Search

Introduction Increasing fragility with the aging population compels less invasive procedures. Even if cardiac surgeries are getting minimally invasively with new techniques and technological development in the field, many valve surgery candidates suffer from being qualified as inoperable due to fragility, unstable circulatory system, and to be post-myocardial infarction and their life is in danger every day that they are not operated. The main purpose of this case-based role model study is to invent a new technique for implanting a transapical mitral valve neocorda implantation with new tools. Case report The study was designed as a role model study with a domestic pig. The pig was operated upon at the Experimentaanimalss' production and research center in the veterinarian faculty of Baskent University. Equipment: Figure 1A: Ozan's Ring: The purpose of the apparatus is for stabilized the myocardium and to resist the widening of the hole that is made by the seldinger needle Figure 2B: Picket with the hole: The purpose of the apparatus is to pierce the mitral valve. It is placed on the dilatator of the sheath. After piercing the mitral valve it is pushed by a Teflon wire to the atrial face of the mitral valve. The step-by-step description of the procedure a. Left ventricle is punctured by a seldinger needle and a J guide wire is advanced to the left ventricle. b. The apparatus which has a diameter as the distal part of an 8F sheath is loaded (Ozan's ring) on the 8F sheath, it is advanced to the apical of the left ventricle till it penetrates the myocardium, and the sheath is removed except J wire. c. The 7 F sheath is advanced on the guide wire into the left ventricle. d. With TEE guidance, the sheath is manipulated under the posterior leaflet of the mitral valve. e. The neo-chord is attached to the part of the second apparatus (Picket with the hole-PWH), the chord is placed on the top of the dilator, and when the heart rate is paced at 200 beats/min, the second apparatus is pushed with TEE guidance to pierce the posterior leaflet. With a J-tipped Teflon wire, the second apparatus is pushed from the dilator tip to the atrial surface of the mitral valve, and the dilator is removed. f. Three pro-glides are placed on the apical left ventricle at 10-14-18 o'clock. g. Sheath will be removed and bleeding control is achieved by making an apical knot with pro-glides. h. Then the processing is terminated i. The subject will be allowed to remain alive for about an hour, after which it will be sacrificed and the entrance and placement of the neocord will be observed. The Procedure: Midline sternotomy was performed and the pericardium was opened because the pig heart was out of reach of the seldinger needle. Although the procedure was planned to be performed under transesophageal echocardiography (TEE) the heart could not be visualized most probably due to pneumothorax that developed during sternotomy and the over-weight of the guinea pig. We decided to continue the procedure by attaching the TEE probe over to the heart. The seldinger needle was advanced into the left ventricle from the side of the left anterior descending artery. The J guide wire was advanced to the left ventricle and the needle was removed. An 8 F sheat and PWH apparatus over the sheath was advanced into the wall of the left ventricle till the apparatus was implanted in the myocardium. Hereupon, an 8 F sheath was extracted while the J wire was inside and a 7 F sheath was advanced over the J wire and the PWH apparatus is advanced through the valve. The sheath was visualized inside of the left ventricle. (Figure 2). The hemodynamics of the pig deteriorated due to pneumothorax and the echocardiographic images were insufficient to manipulate the sheath under the posterior leaflet of the mitral valve. The cardiovascular team decided to terminate the procedure. Intracardiac propofol was used for sacrification. The heart was displaced and the desired experimental study was performed in a disconnected heart. Conclusion We concluded that this role model study is significant in that it has the potential to be a precursor to laparoscopic or percutaneous intracardiac procedures. The method that we administered in the current study is innovative and groundbreaking if it would be performed. Future role model studies must be designed witmaterialsal that would have a better technological design in equipped animal laboratories. [ABSTRACT FROM AUTHOR]

Copyright of Archives of the Turkish Society of Cardiology / Türk Kardiyoloji Derneği Arşivi is the property of KARE Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: Resistin, a cysteine-rich peptide, is associated with atherosclerosis and diabetes. Resistin levels increase corresponding to coronary artery disease (CAD) and heart failure severity. Since resistin level tends to elevate with symptomatic heart failure, it is expected to be associated with left ventricular end-diastolic pressure (LVEDP). However, there is no relevant literature on the relationship between resistin levels and LVEDP. We aimed to evaluate the association between resistin levels and LVEDP, severity of CAD, carotid intima-media thickness (CIMT), and echocardiographic diastolic dysfunction parameters. Methods: For this study, 128 euvolemic patients with creatinine clearance >50 mg/dL and without acute coronary syndrome, who had typical chest pain or were stress test positive, were enrolled. Resistin level was measured by Enzyme-linked immunosorbent assays (ELISA) method. Severe CAD is defined as ≥50% stenosis in one of the major coronary arteries. LVEDP was measured during left heart catheterization. Results: After coronary angiography, 60 patients (46.9%) had severe CAD. The mean LVEDPs were similar for patients with and without severe CAD (p=0.480). The resistin levels did not differ between the groups (p=0.154). The resistin levels did not correlate with LVEDP (r=-0.045, p=0.627), ejection fraction (EF; r=0.110, p=0.228), the Gensini score (r=-0.091, p=0.328), and CIMT (r=0.082, p=0.457). No significant correlation was found between the echocardiographic diastolic dysfunction parameters and resistin levels. Conclusion: There was no significant correlation between resistin level and LVEDP, CAD severity, echocardiographic diastolic dysfunction parameters, and CIMT. Further studies are warranted to determine the efficacy of resistin in clinical use. [ABSTRACT FROM AUTHOR]

Objective: Cystatin C and neutrophil gelatinase-associated lipocalin (NGAL) are biomarkers of renal functions. We evaluated their roles in predicting the severity of coronary artery disease (CAD). Methods: Fifty-two consecutive type 2 diabetic patients (32 males, 65.7±8.6 years) who underwent coronary angiography (CAG) for stable CAD were included in this single-center, prospective, cross-sectional study. Patients with an estimated glomerular filtration rate <60 mL/min/1.73 m2 and with a history of by-pass surgery and/or coronary stent implantation were excluded. The vessel score and Gensini score were calculated to assess the presence and severity of CAD. Mann-Whitney U test, Spearman test, and multiple linear regression analysis were used for the main statistical analyses. Results: Serum cystatin C levels were higher in patients with multivessel disease than in those with single vessel disease [1260 ng/mL (953-1640) vs. 977 ng/mL (599-1114), p=0.017]. According to the median Gensini score, the higher score group also had higher cystatin C levels than the lower score group [1114 ng/mL (948-1567) vs. 929 ng/mL (569-1156), p=0.009]. However, serum NGAL levels were similar between these subgroups. There was a positive correlation between cystatin C and Gensini score (r=0.334, p=0.016). Multiple linear regression analysis revealed serum cystatin C as an independent predictor of the Gensini score (β=0.360, t=2.311, p=0.026). These results may aid in defining cystatin C as a surrogate marker of the extent of CAD in further clinical trials. Conclusion: Serum Cystatin C, but not NGAL levels, could predict the severity of CAD in diabetic patients. [ABSTRACT FROM AUTHOR]

Objective: The aim of this study was to investigate the factors associated with coronary stent restenosis and if there is an association between plasma asymmetric dimethylarginine (ADMA) levels and stent restenosis. Methods: Ninety-one patients, who had a history of coronary bare metal stent implantation due to any cause in the last one year period, were admitted to this observational cross-sectional study. Coronary angiography was performed to all patients and quantitative angiography was used to determine the presence of stent restenosis. Laboratory parameters and angiographic features that contribute to stent restenosis were evaluated. Plasma ADMA levels were measured by using high performance liquid chromatography. Logistic regression analysis was used to determine the independent factors of stent restenosis. Results: Angiographic restenosis was found in 35 patients (38.5%). Stent diameter (p=0.038) and left ventricular ejection fraction (p=0.023) were lower and stent implantation history due to acute coronary syndrome (p=0.029), plasma ADMA level (5.0±1.8x10-4 mmol/L vs. 3.9±1.0x10-4 mmol/L, p=0.001), C-reactive protein concentration (p=0.016), white blood cell count (p=0.044) and stent length (p=0.005) were higher in patients with restenosis. Plasma ADMA level (β=0.536; OR: 1.710; CI: 1.022-2.861; p=0.041), C-reactive protein concentration (β=0.062; OR: 1.064; CI: 1.003- 1.129; p=0.041), stent diameter (β=-3.047; OR: 0.048; CI: 0.007-0.313; p=0.002) and length (β=0.165; OR: 1.179; CI: 1.036-1.343; p=0.013) were found to be the independent predictors of stent restenosis in logistic regression analysis. Conclusion: We conclude that plasma ADMA levels may be used as a novel marker for stent restenosis beyond the classic stent restenosis markers. (Anadolu Kardiyol Derg 2014; 14: 491-7) [ABSTRACT FROM AUTHOR]

Copyright of Anatolian Journal of Cardiology / Anadolu Kardiyoloji Dergisi is the property of KARE Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Anatolian Journal of Cardiology / Anadolu Kardiyoloji Dergisi is the property of KARE Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Transcatheter aortic valve implantation (TAVI) is a safe and effective alternative to surgical valve replacement in intermediate and even in low-risk patient cohorts. Direct aortic (DAo) route may be used in patients with severe peripheral vascular disease. Here, we present an 88-year old patient hospitalized with cardiogenic shock. Echocardiography revealed severe aortic valve stenosis with aortic valve area 0.5 cm², mean gradient of 55 mmHg, and peak gradient 92 mmHg. TAVI was considered by the Institutional Heart Team. Multislice computed tomography (MSCT) revealed severe peripheral vascular disease, decreased calibration of abdominal aorta, and multiple large vulnerable atherosclerotic plaques. The patient was scheduled for a DAo TAVI. A 26-mm Medtronic CoreValve Evolut R valve was implanted after predilatation with median sternotomy. The patient was discharged after 96 hours. Although transfemoral (TF) access is used as the default approach for TAVI, it was contraindicated in our patient owing to severe peripheral vascular disease and decreased calibration of the abdominal aorta at its narrowest point (4.5 mm) with multiple large vulnerable atherosclerotic plaques. Careful preprocedural MSCT evaluation is essential and directly affects the success of the procedure. MSCT is also mandatory to confirm the best cannulation zone that must be met for a successful DAo TAVI.

Introduction: Respiratory and cardiac functions in association with skeletal and neurophysiologic systems can be evaluated with cardiopulmonary exercise testing (CPET). Compared to treadmill exercise test, CPET provides more comprehensive data about the hemodynamic response to exercise., Materials and Methods: We aimed to evaluate the relationship with CPET findings and coronary lesions identified on angiography in patients with angina pectoris who underwent teradmill exercise, CPET and coronary angiography (CAG). By this way we sought to examine the CPET parameters that might be predictive for coronary artery disease (CAD) before diagnostic exercise test results and ischemia symptoms develop. Thirty patients in whom CAG was planned because of symptoms and exercise test results were enrolled in the study. Oxygen consumption (VO2), carbondioxide production (VCO2), minute ventilation (VE), maximum work rate (WR), DVO2/DWR and O2 pulse (VO2/HR) values were calculated. Significant CAD was defined as ≥ 50% narrowing in at least one of the coronary arteries., Result: The mean age was 60.4 ± 8.9 years ve 21 (65.6%) of subjects were male. On CAG, CAD was detected in 19 (59.4%) patients. Maximum heart rate, heart rate reserve (HRR), VE/VCO2 measured at anaerobic threshold (AT) and VO2(mL/kg/min) were significantly differed in patients with CAD than those without (p= 0.031; p= 0.041; p= 0.028; p= 0.03 respectively). Peak VO2, VO2/WR and O2 pulse values were higher in patients with normal angiographic results than those with CAD but the difference did not reach to statistical significance., Conclusions: The findings of our study indicate that among CPET parameters AT VE/VCO2, ATVO2 (mL/kg/dk) and HRR can have predictive value in the diagnosis of CAD. We think that these parameters might be used in the evaluation of patients with angina and dyspnea suspected of CAD. In conclusion parameters obtained during the test that are not influenced by patient's effort might increase the value of CPET in the diagnosis CAD.

Objectives: Accumulating data indicate that serum gamma-glutamyltransferase (GGT) activity represents a true marker of atherosclerotic cardiovascular disease and has prognostic importance. In this study, we sought to evaluate serum GGT activity in patients with metabolic syndrome (MetS)., Study Design: We enrolled 232 patients (mean age 60.4 years) from our outpatient cardiology clinic, 117 with and 115 without MetS (control group) as defined by the ATP-III criteria. The results of serum liver function tests including serum GGT and C-reactive protein (CRP) levels were compared between the two groups., Results: The two groups were similar with regard to age, sex, smoking, and family history of coronary artery disease (p>0.05). The prevalences of hypertension and dyslipidemia were significantly higher in patients with MetS. Compared with controls, patients with MetS had significantly higher serum GGT [(median 21, interquartile range (16-33) vs. 19 (14-26) U/l; p=0.008] and C-reactive protein levels [6.2 (3.6-9.4) vs. 5.0 (3.1-7.0) U/l; p=0.044]. A high GGT activity (>40 U/l) was determined in 14.5% of the patients with MetS and in 4.4% of the control subjects (p=0.012). Serum GGT level showed significant correlations with MetS (r=0.24, p=0.001), CRP (r=0.20, p=0.003), triglyceride (r=0.18, p=0.006), HDL cholesterol (r=-0.19, p=0.004), aspartate aminotransferase (r=0.15, p=0.02), alanine aminotransferase (r=0.32, p=0.001), and alkaline phosphatase (r=0.16, p=0.01). This significant association continued only for MetS (β=-0.25, p=0.03), HDL cholesterol (β=-0.18, p=0.03), and alkaline phosphatase (β=0.17, p=0.01) in multivariate regression analysis., Conclusion: Our findings suggest that patients with MetS have higher serum GGT and CRP levels compared with controls. This increased GGT level might be a marker of increased oxidative stress and premature atherosclerosis.