139 results on '"Siamak Mohammadi"'
Search Results
2. Commentary: Transcatheter therapies for tricuspid regurgitation: The rise of a new standard?Central Message
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Laurent Faroux, MD, MSc, Dimitri Kalavrouziotis, MD, FRCSC, and Siamak Mohammadi, MD, FRCSC
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Diseases of the circulatory (Cardiovascular) system ,RC666-701 ,Surgery ,RD1-811 - Published
- 2020
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3. Macroscopic and microscopic features of surgically explanted transcatheter aortic valve prostheses
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Samantha Guimaron, Dimitri Kalavrouziotis, Michaël Maranda‐Robitaille, Eric Dumont, Phillipe Joubert, Shervin Babaki, Josep Rodés‐Cabau, and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,Endocarditis ,Calcinosis ,Thrombosis ,Aortic Valve Stenosis ,Transcatheter Aortic Valve Replacement ,Treatment Outcome ,Risk Factors ,Aortic Valve ,Heart Valve Prosthesis ,Humans ,Surgery ,Cardiology and Cardiovascular Medicine ,Retrospective Studies - Abstract
With the extended indications of transcatheter aortic valve (TAV) replacement (TAVR) to lower-risk patients, there is an increasing number of patients requiring surgical explantation of failed TAV. We sought to describe macroscopic and microscopic features of surgically explanted percutaneous aortic valve prostheses.Preoperative and surgical characteristic of patients undergoing surgical explantation of TAV were retrospectively analyzed from 2007 to 2020. Surgical and pathologic features of these valves, and outcomes of the surgical valve replacement were described.Out of 1764 patients who underwent a TAVR procedure, 21 were operated for TAV failure. Isolated or combined indications for surgery included: significant paravalvular leak (n = 15), delayed prosthesis migration (n = 5), significant increase of trans-TAV gradients (n = 6), and endocarditis (n = 3). Mean time elapsed between TAVR and explantations was 674.9 ± 803.9 days. Macroscopic lesions found on explanted percutaneous valves were severe adhesions to the aorta (n = 10), calcifications (n = 7), leaflet thrombosis (n = 4), and vegetations (n = 3). Except for patients with endocarditis, one or more pathological lesions were found in 15 patients. Pathology analyses on these valves showed fibro-calcific degenerations (n = 12), pannus formation (n = 9), and chronic inflammation (n = 3). One patient (4.8%) died after surgical explantation, and 13 (61.9%) had concomitant procedures. The survival rate at 1 year was 94.4%.Microscopic findings of fibro-calcific leaflet degeneration, and pannus formation in addition to macroscopic calcification and thrombosis present early, (within a mean of 2 years) after TAVR. Further investigation with a higher number of patients and echocardiographic follow-up is warranted.
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- 2022
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4. Post‐pneumonectomy patients undergoing cardiac surgery: A case series
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Frédéric, Jacques, Dounia, Rouabhia, Valérie, Lafrenière-Bessi, Serge, Simard, Stéphanie, Dionne, Etienne J, Couture, Jean, Perron, François, Dagenais, Yves, Lacasse, Paula, Ugalde, and Siamak, Mohammadi
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Aged, 80 and over ,Heart Valve Prosthesis Implantation ,Pulmonary and Respiratory Medicine ,Middle Aged ,Postoperative Complications ,Treatment Outcome ,Risk Factors ,Aortic Valve ,Humans ,Surgery ,Cardiac Surgical Procedures ,Pneumonectomy ,Cardiology and Cardiovascular Medicine ,Aged ,Retrospective Studies - Abstract
Data regarding post-pneumonectomy patient assessment for cardiac surgery is scarce. This retrospective study was conducted to define early and late outcomes in these patients, and to identify risk factors for poor outcomes.This study included patients with a previous history of pneumonectomy undergoing on-pump cardiac surgery with median sternotomy. The institutional database was reviewed from 1992 to 2018.Sixteen post-pneumonectomy patients (all lung cancer) were identified. The age range was 53-81 years. The mean FEV1/FVC was 69%. The mean EuroSCORE II was 11.6%. Four patients had heart failure symptoms in the 2 weeks before surgery. Seven patients had isolated coronary artery bypass grafting (CABG) and six patients had CABG + aortic valve replacement (AVR). The major perioperative events affecting the ease and outcomes of the surgical procedures were structural shifts (5), extensive adhesions on heart and vessels (5), and extensive calcification of heart components (5). Important postoperative complications were respiratory (7), infections (5), and acute kidney injury (5). The median hospital length of stay was 7 days. Five patients died in hospital (none with isolated CABG) with a preoperative New York Heart Association classification (NYHA) of III-IV, a cardiopulmonary bypass time of 175.2 min and an aortic cross-clamp time of 104.0 min. The long-term survival data were recorded with a mean follow-up of 7.3 ± 7.1 years (range from 0 to 19). The overall, 5-year survival, was 50% for all cardiac surgeries, 71% for isolated CABG surgeries, and 17% for CABG + AVR surgeries, respectively.Post-pneumonectomy patients have acceptable postoperative outcomes and survival. Simple and short surgeries with careful planning can yield favorable outcomes for this high-risk subgroup of patients.
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- 2022
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5. Surgical Aortic Valve Replacement in the Elderly: It Is Worth It!
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Joseph Nader, Thierry Caus, Omar Zainulabdin, Mohamed Marzouk, Siamak Mohammadi, Solenne Vasse, Shanaya Guay, François Dagenais, and Pierre Voisine
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,SF-36 ,030204 cardiovascular system & hematology ,law.invention ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Quality of life ,Aortic valve replacement ,Risk Factors ,law ,medicine ,Humans ,Myocardial infarction ,Aged ,Retrospective Studies ,Aged, 80 and over ,Heart Valve Prosthesis Implantation ,business.industry ,Retrospective cohort study ,EuroSCORE ,Aortic Valve Stenosis ,General Medicine ,medicine.disease ,Intensive care unit ,Surgery ,Treatment Outcome ,030228 respiratory system ,Aortic Valve ,Cohort ,Quality of Life ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
To evaluate survival and quality of life of octogenarians after surgical aortic valve replacement (SAVR), up to 10 year of follow-up. Retrospective observational study on octogenarians operated for an isolated or combined SAVR in 2 centers between 2005 and 2011. Preoperative data were collected for each patient and updated regularly with last follow-up on July 2018. Early postoperative course was assessed for all patients. The primary outcome was late survival after discharge. Health-related quality of life was evaluated in all surviving patients using the Short-Form 12 questionnaire. Nine hundred and nine patients were included. The median age was 82 ± 2.6 years, with 400/909 females (44%). Isolated AVR was performed in 452/909 patients (49.7%). Early in-hospital mortality occurred in 71/909 patients (7.8%). Mean follow-up was 5.9 ± 3.4 years. Survival at 2, 5, and 10 years in the overall cohort was 89%, 70%, and 28%, respectively, without significant difference between isolated or combined AVR. Survival was significantly higher in patients with a Euroscore8% (P0.0001). Multivariate analysis found that older age at surgery, diabetes, history of myocardial infarction, atrial fibrillation and chronic renal failure were predictors of long-term mortality. Finally, the SF-12 physical score was 40.7 ± 10.4 and mental and emotional score was 52.7 ± 8.6 at last follow-up, which falls within the expected range for the general population (50 ± 10) with comparable age. SAVR remains an effective treatment for aortic valve disease in octogenarians, not only increasing life expectancy but also conferring a long-standing quality of life with excellent valve durability.
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- 2022
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6. Transcatheter aortic valve replacement in obese patients: procedural vascular complications with the trans-femoral and trans-carotid access routes
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Alberto Alperi, Angela McInerney, Thomas Modine, Chekrallah Chamandi, Jose D Tafur-Soto, Marco Barbanti, Diego Lopez, Francisco Campelo-Parada, Asim N Cheema, Stefan Toggweiler, Francesco Saia, Ignacio Amat-Santos, Juan F Oteo, Viçent Serra, Maciej Dabrowski, Ramzi Abi-Akar, Natalia Giraldo Echavarria, Roberto Valvo, Javier Lopez-Pais, Anthony Matta, Mobeena Arif, Federico Moccetti, Miriam Compagnone, Siamak Mohammadi, Luis Nombela-Franco, Josep Rodés-Cabau, Institut Català de la Salut, [Alperi A] Quebec Heart & Lung Institute, Laval University, Quebec City, Canada. [McInerney A] Cardiovascular Institute, Hospital Clinico San Carlos, Madrid, Spain. [Modine T] Centre Hospitalier Universitaire de Lille, Lille, France. [Chamandi C] Hôpital européen Georges-Pompidou, Paris, France. [Tafur-Soto JD] The Ochsner Clinical School, Ochsner Medical Center, New Orleans, LA, USA. [Barbanti M] Ferrarotto Hospital, University of Catania, Catania, Italy. [Serra V] Vall d’Hebron Hospital Universitari, Barcelona, Spain, and Vall d'Hebron Barcelona Hospital Campus
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Pulmonary and Respiratory Medicine ,Time Factors ,intervenciones quirúrgicas::procedimientos quirúrgicos cardiovasculares::procedimientos quirúrgicos cardíacos::implantación de prótesis valvulares cardíacas::sustitución valvular aórtica con catéter [TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS] ,Pathological Conditions, Signs and Symptoms::Signs and Symptoms::Body Weight::Overweight::Obesity [DISEASES] ,Aortic Valve Stenosis ,Otros calificadores::Otros calificadores::/efectos adversos [Otros calificadores] ,Persones obeses ,Femoral Artery ,Transcatheter Aortic Valve Replacement ,enfermedades cardiovasculares::enfermedades cardíacas::enfermedades de las válvulas cardíacas::estenosis de la válvula aórtica [ENFERMEDADES] ,Treatment Outcome ,Risk Factors ,Aortic Valve ,Vàlvula aòrtica - Estenosi - Cirurgia ,Cateterisme cardíac - Complicacions ,Other subheadings::Other subheadings::/adverse effects [Other subheadings] ,Surgical Procedures, Operative::Cardiovascular Surgical Procedures::Cardiac Surgical Procedures::Heart Valve Prosthesis Implantation::Transcatheter Aortic Valve Replacement [ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT] ,Humans ,Surgery ,afecciones patológicas, signos y síntomas::signos y síntomas::peso corporal::sobrepeso::obesidad [ENFERMEDADES] ,Obesity ,Cardiovascular Diseases::Heart Diseases::Heart Valve Diseases::Aortic Valve Stenosis [DISEASES] ,Cardiology and Cardiovascular Medicine ,Retrospective Studies - Abstract
OBJECTIVES Obesity may increase the risk of vascular complications in transfemoral (TF) transcatheter aortic valve replacement (TAVR) procedures. The transcarotid (TC) approach has recently emerged as an alternative access in TAVR. We sought to compare vascular complications and early clinical outcomes in obese patients undergoing TAVR either by TF or TC vascular access. METHODS Multicentre registry including obese patients undergoing TF- or TC-TAVR in 15 tertiary centres. All patients received newer-generation transcatheter heart valves. For patients exhibiting unfavourable ileo-femoral anatomic characteristics, the TC approach was favoured in 3 centres with experience with it. A propensity score analysis was performed for overcoming unbalanced baseline covariates. The primary end point was the occurrence of in-hospital vascular complications (Valve Academic Research Consortium-2 criteria). RESULTS A total of 539 patients were included, 454 (84.2%) and 85 (15.8%) had a TF and TC access, respectively. In the propensity-adjusted cohort (TF: 442 patients; TC: 85 patients), both baseline and procedural valve-related characteristics were well-balanced between groups. A significant decrease in vascular complications was observed in the TC group (3.5% vs 12% in the TF group, odds ratio: 0.26, 95% CI: 0.07–0.95, P = 0.037). There were no statistically significant differences between groups regarding in-hospital mortality (TC: 2.8%, TF: 1.5%), stroke (TC: 1.2%, TF: 0.4%) and life-threatening/major bleeding events (TC: 2.8%, TF: 3.8%). CONCLUSIONS In patients with obesity undergoing TAVR with newer-generation devices, the TC access was associated with a lower rate of vascular complications. Larger randomized studies are warranted to further assess the better approach for TAVR in obese patients.
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- 2021
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7. Surgical Explantation After TAVR Failure
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Vinayak N. Bapat, Syed Zaid, Shinichi Fukuhara, Shekhar Saha, Keti Vitanova, Philipp Kiefer, John J. Squiers, Pierre Voisine, Luigi Pirelli, Moritz Wyler von Ballmoos, Michael W.A. Chu, Josep Rodés-Cabau, J. Michael DiMaio, Michael A. Borger, Rudiger Lange, Christian Hagl, Paolo Denti, Thomas Modine, Tsuyoshi Kaneko, Gilbert H.L. Tang, Aditya Sengupta, David Holzhey, Thilo Noack, Katherine B. Harrington, Siamak Mohammadi, Derek R. Brinster, Marvin D. Atkins, Muhanad Algadheeb, Rodrigo Bagur, Nimesh D. Desai, Oliver D. Bhadra, Lenard Conradi, Christian Shults, Lowell F. Satler, Basel Ramlawi, Newell B. Robinson, Lin Wang, George A. Petrossian, Martin Andreas, Paul Werner, Andrea Garatti, Flavien Vincent, Eric Van Belle, Francis Juthier, Lionel Leroux, John R. Doty, Joshua B. Goldberg, Hasan A. Ahmad, Kashish Goel, Ashish S. Shah, Arnar Geirsson, John K. Forrest, Kendra J. Grubb, Sameer Hirji, Pinak B. Shah, Giuseppe Bruschi, Guido Gelpi, Igor Belluschi, Maral Ouzounian, Marc Ruel, Talal Al-Atassi, Joerg Kempfert, Axel Unbehaun, Nicholas M. Van Mieghem, Thijmen W. Hokken, Walid Ben Ali, Reda Ibrahim, Philippe Demers, Alejandro Pizano, Marco Di Eusanio, Filippo Capestro, Rodrigo Estevez-Loureiro, Miguel A. Pinon, Michael H. Salinger, Joshua Rovin, Augusto D'Onofrio, Chiara Tessari, Antonio Di Virgilio, Maurizio Taramasso, Marco Gennari, Andrea Colli, Brian K. Whisenant, Tamim M. Nazif, Neal S. Kleiman, Molly Y. Szerlip, Ron Waksman, Isaac George, Tom C. Nguyen, Francesco Maisano, G. Michael Deeb, Joseph E. Bavaria, Michael J. Reardon, Michael J. Mack, William T. Brinkman, Timothy J. George, Srinivasa Potluri, William H. Ryan, Justin M. Schaffer, Robert L. Smith, Molly Szerlip, Tamim Nazif, Hussein Rahim, Kendra Grubb, Marvin Atkins, Sachin Goel, Neal Kleiman, Michael Reardon, John Doty, Brian Whisenant, Michael Salinger, Lowell Satler, Christian Schults, Susan Fisher, Sophia L. Alexis, Chad A. Kliger, Bruce Rutkin, Pey-Jen Yu, George Petrossian, Newell Robinson, Michael Deeb, Jessica Oakley, Joseph Bavaria, Nimesh Desai, Lisa Walsh, Tom Nguyen, Hasan Ahmad, Joshua Goldberg, David Spielvogel, John Forrest, Michael Chu, Raymond Cartier, Josep Rodes-Cabau, Alain-Philippe Abois, Munir Boodhwani, Alexander Dick, Christopher Glover, Marino Labinaz, Buu-Khanh Lam, Cedric Delhaye, Adeline Delsaux, Tom Denimal, Anaïs Gaul, Mohammad Koussa, Thibault Pamart, Svetlana Sonnabend, Markus Krane, Andrea Munsterer, Michael Borger, Philippe Kiefer, Oliver Bhadra, Len Conradi, Bruno Merlanti, Claudio F. Russo, Claudia Romagnoni, Nicholas Van Mieghem, and Miguel Pinnon
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Mortality rate ,medicine.disease ,Surgery ,Stenosis ,Valve replacement ,Interquartile range ,Concomitant ,medicine ,Endocarditis ,Paravalvular leak ,Cardiology and Cardiovascular Medicine ,business ,Stroke - Abstract
Objectives The aim of this study was to evaluate clinical characteristics, mechanisms of failure, and outcomes of transcatheter aortic valve replacement (TAVR) explantation. Background Surgical explantation following TAVR may be required for structural valve degeneration, paravalvular leak, infection, or other reasons. However, in-depth data on indications and outcomes are lacking. Methods Data from a multicenter, international registry (EXPLANT-TAVR) of patients who underwent TAVR explantation were reviewed retrospectively. Explantations performed during the same admission as initial TAVR were excluded. Clinical and echocardiographic outcomes were evaluated. Median follow-up duration was 6.7 months (interquartile range [IQR]: 1.0-18.8 months) after TAVR explantation and was 97.7% complete at 30 days and 86.1% complete at 1 year. Results From November 2009 to September 2020, 269 patients across 42 centers with a mean age of 72.7 ± 10.4 years underwent TAVR explantation. About one quarter (25.9%) were deemed low surgical risk at index TAVR, and median Society of Thoracic Surgeons risk at TAVR explantation was 5.6% (IQR: 3.2%-9.6%). The median time to explantation was 11.5 months (IQR: 4.0-32.4 months). Balloon-expandable and self-expanding or mechanically expandable valves accounted for 50.9% and 49.1%, respectively. Indications for explantation included endocarditis (43.1%), structural valve degeneration (20.1%), paravalvular leak (18.2%), and prosthesis-patient mismatch (10.8%). Redo TAVR was not feasible because of unfavorable anatomy in 26.8% of patients. Urgent or emergency cases were performed in 53.1% of patients, aortic root replacement in 13.4%, and 54.6% had concomitant cardiac procedures. Overall survival at last follow-up was 76.1%. In-hospital, 30-day, and 1-year mortality rates were 11.9%, 13.1%, and 28.5%, respectively, and stroke rates were 5.9%, 8.6%, and 18.7%, respectively. Conclusions The EXPLANT-TAVR registry reveals that surgical risks associated with TAVR explantation are not negligible and should be taken into consideration in the lifetime management of aortic stenosis.
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- 2021
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8. From the Evolut Pro to the Evolut FX self-expanding transcatheter aortic valve replacement systems: current status and future perspectives
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Vassili Panagides, Jules Mesnier, Jorge Nuche, Robert Delarochellière, Jean-Michel Paradis, Dimitri Kalavrouziotis, Eric Dumont, Siamak Mohammadi, and Josep Rodes-Cabau
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Transcatheter Aortic Valve Replacement ,Treatment Outcome ,Risk Factors ,Aortic Valve ,Heart Valve Prosthesis ,Biomedical Engineering ,Humans ,Surgery ,General Medicine ,Aortic Valve Stenosis ,Prosthesis Design - Abstract
Since the initial experience with the CoreValve (Medtronic, Minneapolis, Minnesota), there have been continuous iterations of this valve system in order to improve procedural success and reduce periprocedural complications. The Evolut Pro, Pro+, and FX are the latest generations of this transcatheter heart valve (THV).This review paper aims to analyze the main characteristics and clinical evidence about the Evolut Pro THV and summarize the main iterations of the newer generation Evolut FX valve system.The Evolut Pro system has been associated with good clinical outcomes and excellent valve hemodynamic performance including reduced rates of paravalvular leaks. Technical enhancements to improve valve positioning, orientation, and vascular access have been implemented in the newer generation Evolut FX system.
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- 2022
9. Should Bilateral Internal Thoracic Arteries be Used in Patients with Chronic Kidney Disease?
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German J, Chaud, Dimitri, Kalavrouziotis, Stéphanie, Dionne, Samantha, Guimaron, Manuel Roque, Cervetti, Shervin, Babaki, and Siamak, Mohammadi
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Pulmonary and Respiratory Medicine ,Surgery ,General Medicine ,Cardiology and Cardiovascular Medicine - Abstract
Preoperative renal dysfunction is a major determinant of operative and long-term mortality following cardiac surgery. The objective of this study was to assess early and long-term results of CABG in patients with preoperative chronic kidney disease (CKD) using a bilateral internal thoracic artery (BITA) strategy, compared to those without CKD. We retrospectively analyzed data for 2,111 consecutive patients who underwent CABG with BITA between 2000 and 2019. One-to-many propensity score matching was performed to produce a cohort of 132 patients with CKD (defined as an estimated glomerular filtration rate60 mL/min/1.73 m
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- 2022
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10. Prognosis of functional mitral regurgitation after aortic valve replacement for pure severe aortic stenosis
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Siamak Mohammadi, Kim O'Connor, Pierre Yves Turgeon, Jonathan Beaudoin, François Dagenais, Frédéric Beaupré, Pierre Voisine, Mohammed Marzouk, Mario Sénéchal, and Emile Voisine
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Population ,030204 cardiovascular system & hematology ,Severity of Illness Index ,Transcatheter Aortic Valve Replacement ,03 medical and health sciences ,0302 clinical medicine ,Aortic valve replacement ,Internal medicine ,medicine ,Humans ,education ,Functional mitral regurgitation ,Retrospective Studies ,Heart Valve Prosthesis Implantation ,Mitral regurgitation ,education.field_of_study ,business.industry ,Significant difference ,Mitral Valve Insufficiency ,Aortic Valve Stenosis ,Perioperative ,Prognosis ,medicine.disease ,Stenosis ,Treatment Outcome ,030228 respiratory system ,Aortic Valve ,Concomitant ,Cardiology ,Surgery ,Cardiology and Cardiovascular Medicine ,business - Abstract
Objective Whether patients with severe aortic stenosis (AS) and significant functional mitral regurgitation (MR) should undergo isolated aortic (aortic valve replacement [AVR]) or double aortic-mitral valve procedure (DVP) remains controversial. We sought to determine outcomes of such patients undergoing surgical (surgical aortic valve replacement [SAVR]) and transcatheter AVR (TAVR) or DVP, identify echocardiographic parameters predictive of significant residual MR after isolated AVR, and determine its impact on long-term survival. Methods Data prospectively collected from 736 consecutive patients with severe AS and significant MR undergoing AVR or DVP were retrospectively analyzed. Exclusion of organic MR, other valve diseases and concomitant CABG yielded a final population of 74 patients with significant functional MR (32 TAVR, 23 SAVR, 19 DVP). Demographics, postoperative complications and age-adjusted survival were compared. Echocardiographic predictors of significant residual MR and its impact on survival were analyzed for patients undergoing isolated AVR. Results In the isolated AVR group, MR improvement occurred in 60% of patients and was associated with a significant increase in survival compared to persistence of significant MR (p = .03). Patients with improved MR had significantly greater preoperative left ventricular dilatation (LVEDD: 49 vs. 43 mm, p = .001; LVESD: 35 vs. 29 mm, p = .03; LVEDV: 101 vs. 71 ml, p = .0003; LVESV: 57 vs. 33 ml, p = .002). There was no significant difference in perioperative mortality (5.3 vs. 4.4 vs. 9.4%, p = .85) or age-adjusted long-term survival between isolated AVR and DVP groups (76.3 vs. 84.2% survival at 2-year follow-up, p = .26), or between SAVR, TAVR and DVP groups (78.2 vs. 75.0 vs. 84.2% survival at 2-year follow-up, p = .13). Conclusions After isolated AVR, MR improvement occurs in 60% of patients. It is predicted by greater ventricular dimensions and associated with significantly better long-term survival. Whether a staged approach with transcatheter correction of MR should be considered in patients with significant residual MR following AVR remains undetermined.
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- 2021
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11. Paradigm shifts in alternative access for transcatheter aortic valve replacement: An update
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Siamak Mohammadi, Josep Rodés-Cabau, Dimitri Kalavrouziotis, Lucia Junquera, and Eric Dumont
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Transcatheter aortic ,Valve replacement ,business.industry ,medicine.medical_treatment ,Paradigm shift ,Internal medicine ,medicine ,Cardiology ,Surgery ,Cardiology and Cardiovascular Medicine ,business - Published
- 2023
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12. Cerebral Embolism After Transcarotid Transcatheter Aortic Valve Replacement: Factors Associated With Ipsilateral Ischemic Burden
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Jean-Michel Paradis, Josep Rodés-Cabau, Sergio Pasian, Laurent Faroux, Eric Dumont, Lucia Junquera, Emilie Pelletier-Beaumont, Dimitri Kalavrouziotis, Alfredo Nunes Ferreira-Neto, Robert DeLarochellière, Siamak Mohammadi, Guillem Muntané-Carol, and David del Val
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Male ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Time Factors ,medicine.medical_treatment ,030204 cardiovascular system & hematology ,Risk Assessment ,Brain Ischemia ,Transcatheter Aortic Valve Replacement ,Lesion ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Valve replacement ,Risk Factors ,Interquartile range ,Internal medicine ,medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Stroke ,Aged ,Aged, 80 and over ,Ejection fraction ,medicine.diagnostic_test ,business.industry ,Incidence ,Quebec ,Magnetic resonance imaging ,Aortic Valve Stenosis ,medicine.disease ,Diffusion Magnetic Resonance Imaging ,Intracranial Embolism ,030228 respiratory system ,Aortic Valve ,Cerebral hemisphere ,Cardiology ,Female ,Surgery ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Transcarotid transcatheter aortic valve replacement (TAVR) recipients may be exposed to a higher ipsilateral subclinical cerebral ischemic burden compared with the contralateral hemisphere. We sought (1) to compare the cerebral ischemic burden of the 2 hemispheres after transcarotid TAVR, as evaluated by diffusion weighted-magnetic resonance imaging (DW-MRI), and (2) to identify the factors associated with ipsilateral ischemic burden. Methods This prospective study included 52 patients undergoing transcarotid TAVR, followed by a DW-MRI examination. All DW-MRIs were analyzed offline by a radiologist blinded to the clinical data. Results TAVR was performed through the left (n = 50) or right (n = 2) carotid artery. Procedural success was achieved in all patients, carotid dissection requiring patch closure occurred in 1 patient, and there were no periprocedural stroke events. At least 1 cerebral ischemic lesion was identified in the ipsilateral and contralateral hemisphere in 84.6% and 63.5% of patients, respectively (P = .005), and the number of ischemic lesions per patient was higher in the ipsilateral vs the contralateral hemisphere (2 [interquartile range, 1-5] vs 1 [interquartile range, 0-3], P = .005). The lesion volume (per lesion) and the average lesion volume (per patient) did not differ between the 2 hemispheres. A larger sheath/catheter size (≥18F vs ≤16F) was associated with a higher ipsilateral ischemic burden (P = .026). Conclusions Carotid artery access for TAVR was associated with a higher number of cerebral ischemic lesions in the ipsilateral (vs contralateral) cerebral hemisphere. The use of a larger sheath/delivery system (≥18F) was associated with an increased ipsilateral ischemic burden.
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- 2021
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13. Aortic Valve Replacement in Low-Risk Patients With Severe Aortic Stenosis Outside Randomized Trials
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Fernando Bernardi, Pierre Voisine, François Dagenais, Josep Rodés-Cabau, Siamak Mohammadi, Alberto Alperi, Eric Dumont, Dimitri Kalavrouziotis, Iria Silva, and Jean Perron
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Male ,Aortic valve ,medicine.medical_specialty ,medicine.medical_treatment ,Coronary Artery Disease ,030204 cardiovascular system & hematology ,law.invention ,Transcatheter Aortic Valve Replacement ,03 medical and health sciences ,Postoperative Complications ,0302 clinical medicine ,Valve replacement ,Aortic valve replacement ,Randomized controlled trial ,Risk Factors ,law ,medicine.artery ,Ascending aorta ,medicine ,Humans ,030212 general & internal medicine ,Aged ,Retrospective Studies ,Tricuspid valve ,business.industry ,Quebec ,Aortic Valve Stenosis ,Odds ratio ,Middle Aged ,medicine.disease ,Surgery ,Stroke ,Stenosis ,medicine.anatomical_structure ,Aortic Valve ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Recent randomized trials including low-risk patients showed positive results for transcatheter aortic valve replacement (TAVR) compared to surgical aortic valve replacement (SAVR), but patients with non-tricuspid aortic valve (NTAV), severe coronary artery disease (SevCAD), and those requiring concomitant mitral/tricuspid valve (CMTV) or concomitant ascending aorta replacement (CAAR) interventions were excluded.This study sought to evaluate the presence and impact of the main clinical variables not evaluated in TAVR versus SAVR trials (NTAV, SevCAD, and CMTV or CAAR intervention) in a large series of consecutive low-risk patients with severe aortic stenosis (SAS) undergoing SAVR.Single-center study including consecutive patients with SAS and low surgical risk (Society of Thoracic Surgeons score of 4%) undergoing SAVR. Baseline, procedural characteristics, and 30-day outcomes were prospectively collected.Of 6,772 patients with SAS who underwent SAVR between 2000 and 2019, 5,310 (78.4%) exhibited a low surgical risk (mean Society of Thoracic Surgeons score: 1.94 ± 0.87%). Of these, 2,165 patients (40.8%) had at least 1 of the following: NTAV (n = 1,468, 27.6%), SevCAD (n = 307, 5.8%), CMTV (n = 306, 5.8%), and CAAR (n = 560, 10.5%). The 30-day mortality and stroke rates for the overall low-risk SAS cohort were 1.9% and 2.4%, respectively. The mortality rate was similar in the SevCAD (2.6%) and CAAR (2.1%) groups versus the rest of the cohort (odds ratio [OR]: 1.79; 95% confidence interval [CI]: 0.85 to 3.75, and OR: 1.64; 95% CI: 0.88 to 3.05, respectively), lower in the NTAV group (0.9%; OR: 0.42; 95% CI: 0.22 to 0.81), and higher in the CMTV group (5.9%; OR: 2.61; 95% CI: 1.51 to 4.5).In a real-world setting, close to one-half of the low-risk patients with SAS undergoing SAVR exhibited at least 1 major criterion not evaluated in TAVR versus SAVR randomized trials. Clinical outcomes were better than or similar to those predicted by surgical scores in all groups but those patients requiring CMTV intervention. These results may help determine the impact of implementing the results of TAVR-SAVR trials in real practice and may inform future trials in specific groups.
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- 2021
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14. Commentary: Moderate aortic regurgitation at the time of surgery: Just don't do it
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Siamak Mohammadi and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Internal medicine ,Regurgitation (digestion) ,medicine ,Cardiology ,Surgery ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Published
- 2022
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15. Aortic Pseudoaneurysm After Type A Aortic Dissection: Results of Conservative Management
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German J. Chaud, Siamak Mohammadi, Manuel Roque Cervetti, Samantha Guimaron, Alexandre Sebestyen, François Dagenais, and Eric Dumont
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Pulmonary and Respiratory Medicine ,Surgery ,General Medicine ,Cardiology and Cardiovascular Medicine - Abstract
Aortic pseudoaneurysms after acute Type A aortic dissection (ATAAD) repair have been reported as high as 10-24% and surgical treatment is usually recommended. The objective of this article is to examine the safety and efficacy of a conservative approach to aortic pseudoaneurysm and to compare this approach to standard surgical treatment. We retrospectively examined 39 patients who had an aortic pseudoaneurysm after ATAAD surgery in order to examine outcomes (baseline characteristics, presentation and freedom from aortic events and mortality). We initially identified 31 patients treated conservatively (CT). After close follow up, 5 of them were operated so 13 patients were treated surgically (ST) and analyzed at a long-term follow-up while 26 were in the conservative group. Mean follow- - up of the whole cohort was 7.9 ± 5.9 years. The freedom from aortic-related mortality at 1, 5, and 10 years was 100%, 83.3% and 72.9% for the ST group and 95.8%, 77.3%, and 77.3% for the CT group (P = 0.35). A conservative approach to aortic pseudoaneurysms could be justified in asymptomatic patients. A close follow-up by a dedicated aortic clinic is mandatory so that patients are referred for surgery when necessary.
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- 2022
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16. Commentary: Tricuspid regurgitation and aortic valve replacement: Act or observe?
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Siamak Mohammadi and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Aortic valve replacement ,business.industry ,Internal medicine ,medicine ,Cardiology ,Surgery ,Regurgitation (circulation) ,Cardiology and Cardiovascular Medicine ,business ,medicine.disease - Published
- 2021
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17. More Than 25 Years of Experience With the Ross Procedure in Children: A Single-Center Experience
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Christine Houde, Siamak Mohammadi, Frédéric Jacques, Philippe Chetaille, Christian Drolet, Jean-Marc Côté, Dimitri Kalavrouziotis, Laurence Vaujois, Charles Laurin, Elisabeth Martin, and Jean Perron
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Male ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Percutaneous ,medicine.medical_treatment ,030204 cardiovascular system & hematology ,Single Center ,03 medical and health sciences ,0302 clinical medicine ,Aortic valve replacement ,Humans ,Medicine ,Autografts ,Child ,Survival rate ,Retrospective Studies ,Bioprosthesis ,Heart Valve Prosthesis Implantation ,business.industry ,Ross procedure ,Quebec ,Retrospective cohort study ,Mean age ,Aortic Valve Stenosis ,medicine.disease ,Cardiac surgery ,Surgery ,Survival Rate ,Treatment Outcome ,surgical procedures, operative ,030228 respiratory system ,Female ,Cardiology and Cardiovascular Medicine ,business ,Follow-Up Studies ,Forecasting - Abstract
Background Aortic valve replacement in children represents an important challenge. Concerns regarding pulmonary autograft and homograft longevity requiring reoperations are well recognized. Very long-term outcomes after the Ross procedure are still unknown. We reviewed our experience with the Ross procedure, aiming to define very long-term survival rate and freedom from reintervention. Methods This was a single-center retrospective cohort including 63 consecutive children who underwent the Ross procedure. Median follow-up duration was 20.5 years. Time-related events were assessed using Kaplan-Meier estimator. Results There were 51 (81%) boys, mean age 10.1 ± 5.8 years. Isolated aortic stenosis was the most common diagnosis (n = 29, 46%) and 34 (54%) patients previously underwent cardiac surgery. There was 1 (1.6%) in-hospital death. Overall survival at 5, 15, and 25 years was 96.7%, 94.4%, and 94.4%, respectively. Freedom from any autograft-related reintervention was 98.1%, 86.4%, and 61.2% at 5, 15, and 25 years, respectively. Fifteen (24%) patients underwent autograft reoperations. Among them, 10 (67%) patients underwent valve-sparing autograft reoperation. Freedom from any pulmonary conduit reintervention was 93.2%, 58.2%, and 28.3% at 5, 15, and 25 years, respectively. Thirty (46.6%) patients underwent conduit reintervention (8 percutaneous, 22 surgical replacements). Conclusions The pediatric Ross procedure is associated with excellent long-term survival. Ross-related reinterventions are more than twice as common on the pulmonary homograft than on the autograft.
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- 2020
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18. Incidence, predictors and prognostic value of permanent pacemaker implantation following sutureless valve implantation in low-risk aortic stenosis patients
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Victoria Vilalta, Germán Cediel, Siamak Mohammadi, Helena López, Dimitri Kalavrouziotis, Helena Resta, Eric Dumont, Pierre Voisine, François Philippon, Claudia Escabia, Andrea Borrellas, Alberto Alperi, Antoni Bayes-Genis, and Josep Rodes-Cabau
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Pulmonary and Respiratory Medicine ,Heart Valve Prosthesis Implantation ,Pacemaker, Artificial ,Cardiac pacemaker ,Incidence ,Bundle-Branch Block ,General Medicine ,Aortic Valve Stenosis ,Aortic valve stenosis ,Prognosis ,Transcatheter Aortic Valve Replacement ,Treatment Outcome ,Risk Factors ,Aortic Valve ,Heart Valve Prosthesis ,Humans ,Surgery ,Heart conduction system ,Cardiology and Cardiovascular Medicine - Abstract
OBJECTIVES Sutureless aortic valve replacement (SU-SAVR) has been associated with higher rates of permanent pacemaker (PPM) compared with conventionally implanted aortic bioprostheses. The purpose of this study was to determine the incidence, predictors and mid-term prognostic impact of PPM after Perceval (Livanova, London, UK) SU-SAVR in low-risk patients. METHODS A total of 400 consecutive low-risk (EuroSCORE II RESULTS PPM was required in 36 (9%) patients after SU-SAVR, with a median time between the procedure and PPM implantation of 7.5 (4.5–10.5) days. Older age and prior right bundle branch block (RBBB) were associated with an increased risk of PPM (P CONCLUSIONS About 1 out of 10 low-risk patients with aortic stenosis undergoing SU-SAVR with the Perceval prosthesis required PPM implantation. Prior RBBB determined an increased risk (close to 3-fold) of PPM following the procedure. PPM was not associated with a higher risk of clinical events at 3-year follow-up.
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- 2022
19. Aortic valve versus root surgery after failed transcatheter aortic valve replacement
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Keti Vitanova, Syed Zaid, Gilbert H.L. Tang, Tsuyoshi Kaneko, Vinayak N. Bapat, Thomas Modine, Paolo Denti, Shekhar Saha, Christian Hagl, Philipp Kiefer, David Holzhey, Thilo Noack, Michael A. Borger, Nimesh D. Desai, Joseph E. Bavaria, MDPierre Voisine, Siamak Mohammadi, Josep Rodés-Cabau, Katherine B. Harrington, John J. Squiers, Molly I. Szerlip, J. Michael DiMaio, Michael J. Mack, Joshua Rovin, Marco Gennari, Shinichi Fukuhara, G. Michael Deeb, Aditya Sengupta, Philippe Demers, Reda Ibrahim, Moritz Wyler von Ballmoos, Marvin D. Atkins, Neal S. Kleiman, Michael J. Reardon, Francesco Maisano, Oliver D. Bhadra, Lenard Conradi, Christian Shults, Lowell F. Satler, Ron Waksman, Luigi Pirelli, Derek R. Brinster, Muhanad Algadheeb, Michael W.A. Chu, Rodrigo Bagur, Basel Ramlawi, Kendra J. Grubb, Newell B. Robinson, Lin Wang, George A. Petrossian, Lionel Leroux, John R. Doty, Brian K. Whisenant, Joerg Kempfert, Axel Unbehaun, Hussein Rahim, Tamim M. Nazif, Isaac George, Arnar Geirsson, John K. Forrest, Flavien Vincent, Eric Van Belle, Mohamad Koussa, Joshua B. Goldberg, Hasan A. Ahmad, Walid Ben Ali, Martin Andreas, Paul Werner, Kashish Goel, Ashish S. Shah, Guido Gelpi, Marc Ruel, Talal Al-Atassi, Nicholas M. Van Mieghem, Thijmen W. Hokken, Augusto D'Onofrio, Chiara Tessari, Sameer Hirji, Pinak B. Shah, Igor Belluschi, Andrea Garatti, Giuseppe Bruschi, Maral Ouzounian, Alejandro Pizano, Marco Di Eusanio, Filippo Capestro, Maurizio Taramasso, Andrea Colli, Rodrigo Estevez-Loureiro, Miguel A. Pinon, Michael H. Salinger, Antonio Di Virgilio, Tom C. Nguyen, and Rudiger Lange
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Pulmonary and Respiratory Medicine ,Surgery ,Cardiology and Cardiovascular Medicine - Abstract
We sought to determine outcomes of aortic valve replacement (AVR) versus root replacement after transcatheter AVR (TAVR) explantation because they remain unknown.From November 2009 to September 2020, data from the EXPLANT-TAVR International Registry of patients who underwent TAVR explant were retrospectively reviewed, divided by AVR versus root replacement. After excluding explants performed during the same admission as the initial TAVR and concomitant procedures involving the other valves, 168 AVR cases were compared with 28 root replacements, and outcomes were reported at 30 days and 1 year.Among 196 patients (mean age, 73.5 ± 9.9 years) who had primary aortic valve intervention at TAVR explant, the median time from TAVR to surgical explant was 11.2 months (interquartile range, 4.4-32.9 months). Indications for explant were similar between the 2 groups. Compared with AVR, patients requiring root replacement had fewer comorbidities but more unfavorable anatomy for redo TAVR (52.6% vs 26.4%; P = .032), fewer urgent/emergency cases (32.1% vs 58.3%; P = .013), longer median interval from index TAVR to TAVR explant (17.6 vs 9.9 months; P = .047), and more concomitant ascending aortic replacement (58.8% vs 14.0%; P .001). Median follow-up was 6.9 months (interquartile range, 1.4-21.6 months) after TAVR explant and 97.4% complete. Overall survival at follow-up was 81.2% with no differences between groups (log rank P = .54). In-hospital, 30-day, and 1-year mortality rates and stroke rates were not different between the 2 groups.In the EXPLANT-TAVR Registry, AVR and root replacement groups had different clinical characteristics, but no differences in short-term mortality and morbidities. Further investigations are necessary to identify patients at risk of root replacement in TAVR explant.
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- 2022
20. Commentary: Subclinical thrombosis of transcatheter aortic valve replacement valves: Can we halt HALT?
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Dimitri Kalavrouziotis, Siamak Mohammadi, and Michael J. Troncone
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Transcatheter aortic ,business.industry ,medicine.medical_treatment ,Thrombosis ,Aortic Valve Stenosis ,medicine.disease ,Transcatheter Aortic Valve Replacement ,Valve replacement ,Heart Valve Prosthesis ,Internal medicine ,Cardiology ,Humans ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Subclinical infection - Published
- 2022
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21. Commentary: Diamonds are forever: Not so for transcatheter aortic valve replacement
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Siamak Mohammadi, Dimitri Kalavrouziotis, and Charles Laurin
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Transcatheter aortic ,Valve replacement ,business.industry ,medicine.medical_treatment ,medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business - Published
- 2021
22. Commentary: To slipknot or skip the knot: Preclosure in percutaneous extracorporeal membrane oxygenation cannulation, a misuse of precious time?
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Gabriel Georges and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Percutaneous ,business.industry ,medicine.medical_treatment ,Extracorporeal membrane oxygenation ,Commentary ,Medicine ,Surgery ,business ,Knot (mathematics) - Published
- 2021
23. Commentary: Surgical reconstruction with the help of a 3-dimensional printer
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Siamak Mohammadi and Charles Laurin
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Pulmonary and Respiratory Medicine ,business.industry ,Commentary ,Medicine ,Surgery ,business - Published
- 2021
24. Early to midterm survival of patients with deep sternal wound infection managed with laparoscopically harvested omentum
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Dimitris Kalavrouziotis, Frédéric S. Hould, Richard Baillot, Joseph Nader, Nawal Amhis, Siamak Mohammadi, Tarek Malas, Mohamed Marzouk, and Laurent Biertho
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Pulmonary and Respiratory Medicine ,Adult ,Male ,medicine.medical_specialty ,Sternum ,medicine.medical_treatment ,Population ,Risk Factors ,medicine ,Humans ,Surgical Wound Infection ,education ,Survival analysis ,Aged ,Retrospective Studies ,education.field_of_study ,business.industry ,Middle Aged ,medicine.disease ,Wound infection ,Sternotomy ,Surgery ,Cardiac surgery ,Bypass surgery ,Median sternotomy ,Heart failure ,Cardiology and Cardiovascular Medicine ,business ,Body mass index ,Omentum - Abstract
Objective The optimal management of deep sternal wound infection (DWSI) remains controversial. Our objective was to evaluate outcomes of patients with DSWI managed with transposition of laparoscopically harvested omentum (LHO). Methods Between 2000 and 2020, a total of 38,623 adult patients who underwent full median sternotomy for cardiac surgery were analyzed retrospectively at our institution. DSWI occurred in 455 (1.2%), of whom 364 (93.2%) were managed with pectoralis myocutaneous flap (PMF) and 33 (7.2%) with LHO. Univariate and multivariate analysis models were used to determine predictors of cumulative late mortality and adjusted survival curves were generated. Results Among patients who received LHO, average age was 65.7 ± 9.7 years and a larger proportion of patients were male. A majority of patients (88%) had coronary bypass surgery, with bilateral internal mammary arteries use in only 21.2%. Mean length of stay (LOS) was 58.90 days and early hospital mortality occurred in 4 patients (12.1%). Patients who received LHO compared to only PMF had larger body mass index and had more heart failure. Furthermore, the hospital LOS was also significantly prolonged in the LHO group (58.9 vs. 27.4 days, p = .002), with a slightly higher in-hospital mortality (12.1% vs. 3.3%, p = .03). Late survival for LHO patients at 5 and 10 years was 71.9% and 44.8%, respectively. Conclusion Use of LHO is a safe and viable alternative to traditional myocutaneous flaps to manage complex DSWI. Early and late survival were favorable in this high-risk population.
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- 2021
25. Commentary: Reintervention for a failed surgical aortic bioprosthesis: Procedure- or patient-driven strategy?
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Siamak Mohammadi and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Text mining ,business.industry ,General surgery ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business - Published
- 2022
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26. Commentary: Can Thrombolysis and ECMO Coexist for Treatment of Massive Pulmonary Emboli?
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Dimitri Kalavrouziotis, Gabriel Georges, and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,Fibrinolysis ,medicine.medical_treatment ,MEDLINE ,General Medicine ,Thrombolysis ,Extracorporeal Membrane Oxygenation ,Treatment Outcome ,Text mining ,Humans ,Medicine ,Thrombolytic Therapy ,Surgery ,Pulmonary Embolism ,Cardiology and Cardiovascular Medicine ,business ,Intensive care medicine - Published
- 2022
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27. Commentary: Novel preoperative predictors of acute kidney injury following cardiac surgery: Is it a game changer?
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Dimitri Kalavrouziotis, Siamak Mohammadi, and Sylvie Breton
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,medicine ,Acute kidney injury ,MEDLINE ,Surgery ,Cardiology and Cardiovascular Medicine ,medicine.disease ,business ,Cardiac surgery - Published
- 2021
28. Commentary: Location is not everything: Transseptal valve-in-valve in intra-arterially implanted mitral prostheses
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Siamak Mohammadi, Gabriel Georges, and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,Commentary ,Medicine ,Surgery ,business ,Valve in valve - Published
- 2021
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29. Commentary: Subclinical valve thrombosis: A game-changer issue in transcatheter aortic valve replacement?
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Dimitri Kalavrouziotis, Jean Porterie, and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Valve thrombosis ,Transcatheter aortic ,business.industry ,medicine.medical_treatment ,MEDLINE ,Valve replacement ,Internal medicine ,medicine ,Cardiology ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Subclinical infection - Published
- 2021
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30. Commentary: Walking wounded: Role of ambulatory femoral venovenous extracorporeal membrane oxygenation
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Siamak Mohammadi, Dimitri Kalavrouziotis, and Gabriel Georges
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Pulmonary and Respiratory Medicine ,business.industry ,Anesthesia ,medicine.medical_treatment ,Ambulatory ,Commentary ,Extracorporeal membrane oxygenation ,Medicine ,Surgery ,business - Published
- 2021
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31. Abstract 16958: Comparison of Clinical and Hemodynamic Outcomes Between Redo Surgical Aortic Valve Replacement versus Transcatheter Valve in Valve in Patient With Failed Aortic Bioprostheses
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Nancy Côté, Leonardo Guimaraes, Jérémy Bernard, Lionel Tastet, Erwan Salaun, Sebastien Hecht, Philippe Pibarot, Siamak Mohammadi, Josep Rodés-Cabau, and Eric Dumont
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Aortic valve ,medicine.medical_specialty ,business.industry ,valvular heart disease ,Hemodynamics ,medicine.disease ,Valve in valve ,Surgery ,Cardiac surgery ,medicine.anatomical_structure ,Aortic valve replacement ,Physiology (medical) ,Redo surgery ,medicine ,In patient ,Cardiology and Cardiovascular Medicine ,business - Abstract
Introduction: Transcatheter valve-in-valve implantation (ViV) has emerged as an alternative to redo surgery (REDO) for the treatment of failed surgical aortic bioprostheses. However, there are few studies comparing clinical and hemodynamic outcomes between REDO and ViV in both the short- and long- term follow-up. Objective: The aim of this study was to compare hemodynamic and clinical outcomes between REDO and ViV. Methods: A total of 184 patients who underwent REDO or ViV at our institution between 2003 and 2017 were included in this study. Clinical and transthoracic echocardiography (TTE) data were collected for each patient. TTE was performed prior and after the reintervention and were retrospectively analyzed in an echocardiography core laboratory. An inverse propensity treatment weighting (IPTW) was used to compare outcomes between groups. Results: 104 patients underwent REDO and 80 underwent ViV. Prevalence of suboptimal valve hemodynamics (mean gradient ≥ 20 mmHg and/or ≥ moderate aortic regurgitation) following reintervention was higher in ViV group (29.8% vs. 61.3%, p Conclusions: ViV was associated with lower risk of 30-day but higher risk of long-term mortality compared to REDO.
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- 2020
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32. Commentary: Preoperative Screening CT: Not Ready for Primetime in The COVID-19 Era
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Dimitri Kalavrouziotis, Jean Porterie, and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,business.industry ,General surgery ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Preoperative screening ,MEDLINE ,General Medicine ,medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,ADULT – Commentary - Published
- 2020
33. Commentary: Performing cardiac surgery in the coronavirus disease 2019 (COVID-19) era: What is the new normal?
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Siamak Mohammadi and Dimitri Kalavrouziotis
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Biopsychosocial model ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,business.industry ,viruses ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,030204 cardiovascular system & hematology ,medicine.disease_cause ,Article ,Cardiac surgery ,03 medical and health sciences ,Patient safety ,0302 clinical medicine ,030228 respiratory system ,Cardiothoracic surgery ,Pandemic ,medicine ,Surgery ,Intensive care medicine ,business ,Cardiology and Cardiovascular Medicine ,Coronavirus - Abstract
The global impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the COVID-19 pandemic crisis have significantly changed the landscape of cardiac surgical practice. There is a sense of urgency that is all the more intensified given the many unanswered questions surrounding virus transmission. Furthermore, the cardiac surgeon’s primary responsibility is to assure patient safety and excellent outcome. There remains a huge gap between the different aspects of this biopsychosocial viral crisis and our current knowledge.
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- 2020
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34. Commentary: Veno-venous extracorporeal membrane oxygenation in areas with high coronavirus disease 2019 (COVID-19) burden: Other causes must still be ruled out
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Dimitri Kalavrouziotis and Siamak Mohammadi
- Subjects
Pulmonary and Respiratory Medicine ,2019-20 coronavirus outbreak ,medicine.medical_specialty ,Coronavirus disease 2019 (COVID-19) ,business.industry ,medicine.medical_treatment ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,medicine ,Extracorporeal membrane oxygenation ,Commentary ,Surgery ,Intensive care medicine ,business - Published
- 2020
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35. Prosthetic choice in mitral valve replacement for severe chronic ischemic mitral regurgitation: Long-term follow-up
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Dimitri Kalavrouziotis, Philippe Pibarot, Joseph Nader, Jérémy Bernard, Siamak Mohammadi, Mathieu Bernier, and Mohamed Marzouk
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Pulmonary and Respiratory Medicine ,Mitral regurgitation ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Mitral valve replacement ,Atrial fibrillation ,030204 cardiovascular system & hematology ,medicine.disease ,Prosthesis ,03 medical and health sciences ,0302 clinical medicine ,medicine.anatomical_structure ,030228 respiratory system ,Internal medicine ,Mitral valve ,Propensity score matching ,Cardiology ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Adverse effect ,Stroke - Abstract
Prosthetic choice for mitral valve replacement is generally driven by patient age and patient and surgeon preference, and current guidelines do not discriminate between different etiologies of mitral valve disease. Our objective was to assess and compare short- and long-term outcomes after mitral valve replacement among patients with biological or mechanical prostheses in the setting of severe ischemic mitral regurgitation.Between 2000 and 2016, 424 patients underwent mitral valve replacement for severe ischemic mitral regurgitation at our institution, using biological prosthesis in 188 (44%) and mechanical prosthesis in 236 (56%). A 1:1 propensity score match (n = 126 per group) and inverse probability of treatment weighting were used to compare groups. Short-term outcomes included in-hospital mortality and other cardiovascular adverse events. Long-term outcomes included survival and hospital readmission for cardiovascular causes, stroke, and major bleeding.In-hospital mortality and early postoperative adverse events were similar between groups in the propensity score match and inverse probability of treatment weighting cohorts. Overall long-term survival was similar at 5 and 9 years, but mechanical prosthesis recipients were more frequently readmitted to hospital for cardiovascular causes, including stroke and non-neurological bleeding in propensity score matching and inverse probability of treatment weighting analyses (all P values .004). Type of prosthesis did not independently influence all-cause mortality (hazard ratio, 1.01; 95% confidence interval, 0.71-1.43; P = .959), but placement of a mechanical prosthesis was associated with increased risk of readmission for cardiovascular events (hazard ratio, 1.65; 95% confidence interval, 1.17-2.32; P = .004) among matched patients.The type of prosthesis has no influence on long-term survival among patients with severe ischemic mitral regurgitation undergoing mitral valve replacement. There may be an increased risk of neurologic events and serious bleeding associated with mechanical prostheses.
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- 2020
36. Clinical impact of the heart team on the outcomes of surgical aortic valve replacement among octogenarians
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Josep Rodés-Cabau, Siamak Mohammadi, Robert De Larochellière, Dimitri Kalavrouziotis, Jean Porterie, Jean-Michel Paradis, and Eric Dumont
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,COPD ,business.industry ,medicine.medical_treatment ,Hazard ratio ,EuroSCORE ,030204 cardiovascular system & hematology ,medicine.disease ,Confidence interval ,03 medical and health sciences ,0302 clinical medicine ,030228 respiratory system ,Aortic valve replacement ,Valve replacement ,Heart failure ,Internal medicine ,medicine ,Cardiology ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Stroke - Abstract
Objectives The effectiveness of a multidisciplinary heart team in the management of patients with severe symptomatic aortic stenosis is unknown. This study evaluated the impact of a heart team on the outcomes of surgical aortic valve replacement in octogenarians. Methods Between May 2007 and January 2016, 528 patients aged 80 years or more were referred to our institutional heart team for a transcatheter aortic valve replacement. Among these, 101 were redirected to surgical aortic valve replacement (heart team group). These patients were compared with a surgical aortic valve replacement cohort (n = 506) without prior heart team screening (non-heart team group), taken from the same time period. Propensity score matching with bootstrap analysis was performed; 76 heart team patients were matched to 76 non-heart team patients. Early and late outcomes including survival and readmission for cardiovascular causes were compared. Results Matched subgroups were largely comparable; congestive heart failure and echocardiographic pulmonary hypertension were more prevalent in the heart team group. In-hospital mortality was significantly lower in the matched heart team group (0% vs 6.0%, bootstrap mean difference 6.0%, 95% confidence interval, 2.2-9.8). The risk of stroke, low cardiac output state, reexploration for bleeding, pneumonia, and prolonged ventilation was also significantly lower in the heart team group. There was no significant between-group difference regarding late survival (hazard ratio, 0.86, 95% confidence interval, 0.55-1.33, P = .49) or readmission for cardiovascular reasons (hazard ratio, 0.70, 95% confidence interval, 0.41-1.20, P = .19). Conclusions Preoperative multidisciplinary assessment of octogenarians by a heart team was associated with lower in-hospital mortality and adverse events after surgical aortic valve replacement.
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- 2020
37. Preoperative physical frailty assessment among octogenarians undergoing cardiac surgery: Upgrading the 'eyeball' test
- Author
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Yasmine Babaki, Stephanie Lim, Dimitri Kalavrouziotis, Shervin Babaki, Serge Simard, Frédéric Jacques, and Siamak Mohammadi
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,education.field_of_study ,Multivariate analysis ,business.industry ,Population ,Odds ratio ,030204 cardiovascular system & hematology ,Intensive care unit ,Confidence interval ,Surgery ,Cardiac surgery ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,030228 respiratory system ,Quality of life ,Interquartile range ,law ,medicine ,Cardiology and Cardiovascular Medicine ,business ,education - Abstract
Objectives There are many well-described, but as yet unproven, physical ability tools to assess frailty. The objective of this study was to evaluate the effectiveness of 4 preoperative physical tests in predicting mortality, morbidity, and functional outcomes among octogenarians undergoing cardiac surgery. Methods Between 2016 and 2019, 200 patients aged 80 years or more undergoing elective cardiac surgery were prospectively recruited. Four physical tests were performed preoperatively: 5-m walk time, timed up-and-go, 5 time sit-to-stand, and handgrip strength tests. The primary end point was a composite of in-hospital mortality, neurologic, and pulmonary complications. Multivariate analysis was performed. Results In-hospital mortality was 1.5%. Slow performance on the 5-m walk test (time ≥6.4 seconds) was the only independent predictor of the composite end point among the tests evaluated (odds ratio, 2.70; 95% confidence interval, 1.34-5.45; P = .006). At follow-up, patients with a slow 5-m walk test had a significantly lower midterm survival compared with patients with a normal test result (1-year survival 91.5% vs 98.7%, log-rank P = .03). Mean Physical and Mental Component Scores of the 12-item short form survey were 47.2 ± 8.3 and 53.6 ± 5.9, respectively, which are comparable to those of a general population aged more than 75 years. Conclusions The 5-m walk time test is an independent predictor of a composite of in-hospital mortality and major morbidity, as well as midterm survival. This test could be used as a simple adjunctive preoperative tool for octogenarians undergoing cardiac surgery.
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- 2020
38. 'How to BIMA?' is in fact the question
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Siamak Mohammadi and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,2019-20 coronavirus outbreak ,Coronavirus disease 2019 (COVID-19) ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Medicine ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Virology - Published
- 2020
39. Commentary: Rheumatic valve surgery in emerging countries: New insights for an old disease
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Jean Porterie, Dimitri Kalavrouziotis, and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Valve surgery ,business.industry ,Rheumatic Heart Disease ,Disease ,Medicine ,Humans ,Mitral Valve Stenosis ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,Intensive care medicine ,Emerging markets - Published
- 2020
40. Radiation Exposure During Transcatheter Aortic Valve Replacement: Impact of Arterial Approach and Prosthesis Type
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Josep Rodés-Cabau, Laurent Faroux, Eric Dumont, Dimitri Kalavrouziotis, Lucia Junquera, David del Val, Jean-Michel Paradis, Robert DeLarochellière, Thierry Blanpain, Jean Arsenault, Aurélien Villecourt, Damien Metz, Jérôme Wintzer-Wehekind, Virginie Heroguelle, Siamak Mohammadi, Vito Giovanni Ruggieri, Leonardo Guimaraes, Sophie Tassan-Mangina, and Guillem Muntané-Carol
- Subjects
Pulmonary and Respiratory Medicine ,Male ,medicine.medical_specialty ,Transcatheter aortic ,medicine.medical_treatment ,030204 cardiovascular system & hematology ,Prosthesis Design ,Prosthesis ,Transcatheter Aortic Valve Replacement ,03 medical and health sciences ,0302 clinical medicine ,Valve replacement ,Internal medicine ,Occupational Exposure ,Clinical endpoint ,Medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Aged ,Aged, 80 and over ,Bioprosthesis ,business.industry ,Transarterial approach ,Radiation Exposure ,Confidence interval ,Radiation exposure ,Femoral Artery ,Carotid Arteries ,030228 respiratory system ,Heart Valve Prosthesis ,Cardiology ,Surgery ,Female ,Patient Safety ,Cardiology and Cardiovascular Medicine ,business - Abstract
BACKGROUND The impact of novel alternative access and valve type on radiation exposure during transcatheter aortic valve replacement (TAVR) has not yet been evaluated. This study sought to determine the impact of a transarterial approach and prosthesis type on physician and patient exposure to radiation during TAVR. METHODS This was a prospective study including 140 consecutive patients undergoing TAVR by transfemoral (n = 102) or transcarotid (TC) (n = 38) access at 2 centers. Implanted valves were the self-expanding Evolut R/PRO system (Medtronic, Minneapolis, MN; n = 38) and the balloon-expandable SAPIEN 3 valve (Edwards Lifesciences, Irvine, CA; n = 102). The primary endpoint was first operator radiation exposure. The secondary endpoint was patient radiation exposure. RESULTS First operator radiation exposure was 4-fold greater during TC TAVR (P < .001). The use of a self-expanding valve was associated with a longer x-ray time (P = .015) and a 2-fold greater first operator radiation dose (P = .018). Patient radiation dose was not significantly affected by arterial approach (P = .055) or valve type (P = .095). After adjustment for potential confounders, the TC approach remained associated with a 174.8% (95% confidence interval, 80.6-318.3, P < .001) increase in first operator radiation dose, whereas the use of a self-expanding valve no longer influenced the first operator dose (P = .630). CONCLUSIONS TC access and the use of a self-expanding valve were associated with a 4- and 2-fold greater first operator radiation exposure during TAVR procedures, respectively. Unlike the arterial approach, the effect of bioprosthesis type on radiation exposure was mainly related to x-ray time and was no longer significant after adjustment.
- Published
- 2020
41. TAVR Access
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Siamak Mohammadi, Josep Rodés-Cabau, and Dimitri Kalavrouziotis
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medicine.medical_specialty ,business.industry ,Aortic valve surgery ,MEDLINE ,Medicine ,Cardiology and Cardiovascular Medicine ,business ,Surgery - Published
- 2019
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42. Minimizing Atheromatous Emboli During Arch Surgery With a Sequential Debranching Procedure
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Siamak Mohammadi, François Dagenais, Valentina Grazioli, and Mohamed Marzouk
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Treatment outcome ,Aortic Diseases ,Aorta, Thoracic ,Prosthesis Design ,law.invention ,Blood Vessel Prosthesis Implantation ,Hypothermia, Induced ,Risk Factors ,Blood vessel prosthesis ,law ,medicine.artery ,medicine ,Cardiopulmonary bypass ,Humans ,Arch ,Aorta ,Cardiopulmonary Bypass ,medicine.diagnostic_test ,business.industry ,Magnetic resonance imaging ,General Medicine ,Middle Aged ,Hypothermia ,Atherosclerosis ,Magnetic Resonance Imaging ,Plaque, Atherosclerotic ,Blood Vessel Prosthesis ,Surgery ,Treatment Outcome ,Intracranial Embolism ,Cardiothoracic surgery ,Female ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Published
- 2019
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43. Commentary: Endocarditis of the forgotten valve: Forget about valvectomy?
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Dimitri Kalavrouziotis and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,General surgery ,Medicine ,Endocarditis ,Surgery ,Cardiology and Cardiovascular Medicine ,business ,medicine.disease - Published
- 2021
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44. Commentary: TAVR-in-TAVR—Be a good host for your guest
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Dimitri Kalavrouziotis and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,medicine ,MEDLINE ,Surgery ,Cardiology and Cardiovascular Medicine ,Intensive care medicine ,business ,Host (network) - Published
- 2021
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45. Commentary: Sweetening the Deal: A Novel Blood Test Ratio for Preoperative Glycemic Screening
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Dimitri Kalavrouziotis, Siamak Mohammadi, and Gabriel Georges
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,medicine ,Blood test ,Surgery ,General Medicine ,Cardiology and Cardiovascular Medicine ,Intensive care medicine ,business ,Sweetening ,Glycemic - Published
- 2021
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46. Clinical Outcomes Following the Ross Procedure in Adults
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Elisabeth Martin, Dimitri Kalavrouziotis, Frédéric Jacques, Jean Perron, Siamak Mohammadi, Daniel Doyle, and Pierre Voisine
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Aortic valve ,medicine.medical_specialty ,medicine.medical_treatment ,Population ,030204 cardiovascular system & hematology ,03 medical and health sciences ,0302 clinical medicine ,Bicuspid aortic valve ,medicine.artery ,Internal medicine ,parasitic diseases ,Ascending aorta ,medicine ,education ,education.field_of_study ,business.industry ,Ross procedure ,Hazard ratio ,medicine.disease ,Surgery ,medicine.anatomical_structure ,030228 respiratory system ,Aortic valve stenosis ,Cardiology ,Platelet aggregation inhibitor ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Very few reports of long-term outcomes of patients who underwent the Ross procedure have been published. Objectives The authors reviewed their 25-year experience with the Ross procedure with the aim of defining very–long-term survival and factors associated with Ross-related failure. Methods Between January 1990 and December 2014, the Ross procedure was performed in 310 adults (mean age 40.8 years) at a single institution. All patients were prospectively added to a dedicated cardiac surgery registry. Complete post-operative clinical examination and history were obtained, and transthoracic echocardiography was performed according to a standardized protocol. There was no loss to follow-up. Median follow-up was 15.1 years and up to 25 years. Results Bicuspid aortic valve was diagnosed in 227 patients (73.2%), and the most common indication for surgery was aortic stenosis (n = 225 [72.6%]). Freedom from any Ross-related reintervention was 92.9% and 70.1% at 10 and 20 years, respectively. Independent risk factors for pulmonary autograft degeneration were pre-operative large aortic annulus (hazard ratio: 1.1; p = 0.01), pre-operative aortic insufficiency (hazard ratio: 2.7; p = 0.002), and concomitant replacement of the ascending aorta (hazard ratio: 7.7; p = 0.0003). There were 4 hospital deaths (1.3%), and overall survival at 10 and 20 years was 94.1% and 83.6%, respectively. Long-term survival was not significantly different in patients who required Ross-related reintervention (log-rank p = 0.70). However, compared with the general population, survival was significantly lower in patients following the Ross procedure when matched on age and sex (p Conclusions The Ross procedure was associated with excellent long-term valvular outcomes and survival, regardless of the need for reintervention. Adults presenting with aortic insufficiency or a dilated aortic annulus or ascending aorta were at greater risk for reintervention. Unlike previous reports, long-term survival was lower in Ross patients compared with matched subjects.
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- 2017
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47. Coronary Revascularization in Patients Undergoing Transcatheter Aortic Valve Replacement
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Justin Fried, Matthew Finn, Benoit M. Labbé, Tamim Nazif, Martin B. Leon, Susheel Kodali, Josep Rodés-Cabau, Jean-Michel Paradis, and Siamak Mohammadi
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medicine.medical_specialty ,Transcatheter aortic ,medicine.medical_treatment ,Context (language use) ,Coronary Artery Disease ,macromolecular substances ,030204 cardiovascular system & hematology ,Transcatheter Aortic Valve Replacement ,Coronary artery disease ,03 medical and health sciences ,0302 clinical medicine ,Valve replacement ,Aortic valve replacement ,Internal medicine ,Myocardial Revascularization ,medicine ,Humans ,030212 general & internal medicine ,business.industry ,Aortic Valve Stenosis ,medicine.disease ,Surgery ,Stenosis ,medicine.anatomical_structure ,Concomitant ,Cardiology ,Cardiology and Cardiovascular Medicine ,business ,Artery - Abstract
Concomitant coronary artery disease (CAD) is highly prevalent among patients with severe aortic stenosis (AS). Historically, surgical aortic valve replacement with coronary artery bypass grafting was the only treatment option for patients with severe AS and significant CAD. The rapid expansion of transcatheter aortic valve replacement has led to significant paradigm shifts in the treatment of severe AS and has raised new questions regarding the optimal management of CAD in these patients. We review the evidence regarding management of concomitant CAD in severe AS patients, specifically focusing on issues surrounding transcatheter aortic valve replacement. In the absence of robust evidence supporting specific treatment strategies, decisions regarding coronary revascularization in severe AS should be individualized and made within the context of a multidisciplinary heart team.
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- 2017
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48. Commentary: Early failure of the Trifecta GT bioprosthesis: Innovation is not always progress
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Siamak Mohammadi, Jean Porterie, and Dimitri Kalavrouziotis
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Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,business.industry ,General surgery ,Commentary ,medicine ,Surgery ,Early failure ,business - Published
- 2020
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49. Commentary: Extracorporeal membrane oxygenation cannulation for postcardiotomy shock—Is location really everything?
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Dimitri Kalavrouziotis and Siamak Mohammadi
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Pulmonary and Respiratory Medicine ,business.industry ,Anesthesia ,medicine.medical_treatment ,Shock (circulatory) ,Extracorporeal membrane oxygenation ,medicine ,Surgery ,medicine.symptom ,Cardiology and Cardiovascular Medicine ,business - Published
- 2020
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50. TCT CONNECT-4 Surgical EXPLANTation After Transcatheter Aortic Valve Replacement Failure: Midterm Outcomes From the EXPLANT-TAVR International Registry
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Filippo Capestro, Ruediger Lange, Antonio Divirgilio, Pinak B. Shah, Svetlana Sonnabend, Giuseppe Bruschi, Andrea Garatti, Francesco Maisano, Jessica Oakley, Oliver Bhadra, G. Deeb, Alberto Alperi, Philippe Demers, Paul H Werner, Michael W.A. Chu, Augusto D'Onofrio, Stephanie Simon, Eric Dumont, Lowell F. Satler, Paolo Denti, Kendra J. Grubb, Jörg Kempfert, Joshua Rovin, Marvin Atkins, Aditya Sengupta, Thomas Modine, Susan G. Fisher, Maral Ouzounian, Ron Waksman, Andrea Colli, Axel Unbehaun, Rodrigo Bagur, Michael J. Reardon, Arnar Geirsson, Michael H. Salinger, Nimesh D. Desai, Newell Robinson, Neal S. Kleiman, Muhanad Algadheeb, Joshua Goldberg, Shinichi Fukuhara, Christian Schults, Brian Whisenant, Elizabeth Walsh, Guido Gelpi, Siamak Mohammadi, Alejandro Pizano, Hasan Ahmad, Marco Gennari, John K. Forrest, Syed Zaid, Sameer A. Hirji, Reda Ibrahim, Marc Ruel, Kashish Goel, Moritz C. Wyler von Ballmoos, Joseph E. Bavaria, Lenard Conradi, Pierre Voisine, Andrea Munsterer, Vinayak Bapat, Keti Vitanova, Josep Rodés-Cabau, Marco Di Eusanio, Tsuyoshi Kaneko, Martin Andreas, Basel Ramlawi, John R. Doty, Talal Al-Atassi, Walid Ben Ali, Lionel Leroux, Gilbert H.L. Tang, David Spielvogel, Ashish S. Shah, George Petrossian, Tom C. Nguyen, Dimitri Kalavrouziotis, Daniel Doyle, Rodrigo Estévez-Loureiro, Maurizio Taramasso, and Lin Wang
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medicine.medical_specialty ,Valve replacement ,Transcatheter aortic ,business.industry ,medicine.medical_treatment ,medicine ,Cardiology and Cardiovascular Medicine ,business ,Explant culture ,Surgery - Published
- 2020
- Full Text
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