127 results on '"Córdova A, Samuel"'
Search Results
52. Reparación valvular mitral en insuficiencia mitral degenerativa: reparabilidad, resultados inmediatos y seguimiento hasta 20 años
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Latorre S, Gonzalo, Almeida Z, Josefina, Besa B, Santiago, Córdova A, Samuel, and Zalaquett S, Ricardo
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Mitral valve annuloplasty ,Mitral valve ,Cardiac surgical procedures ,Mitral valve insufficiency - Abstract
Background: The 2014 Guidelines for the Management of Patients with Valvular Heart Disease require to know the probability of success and operative mortality of Mitral Valve Repair (MVR) for Degenerative Mitral Insufficiency (DMI) at a given institution. Aim: To assess the probability of success, operative mortality and long-term results of MVR for DMI. Patients and Methods: The database of the Cardiovascular Surgery Service was reviewed for the period December 1991 to December 2013. Long-term survival information was obtained from death certificate records of the Chilean Identification Service. Results: One hundred forty seven patients with DMI were identified, all operated by one author (RZ). In 28 (19%) the mitral valve was replaced, including three patients in whom a MVR was intended without success. A successful MVR was performed in 119 patients (81%). The probability of a successful MVR was 97.5% (119 of 122). Prolapsed posterior leaflet was present in 81% and annulus dilatation in 60% of cases. The most frequent surgical procedures were quadrilateral resection (83%) and chordal transfer (13%). A mitral annuloplasty was performed in 92% of cases. Operative mortality was 0.8%. At the end of a 9.9 (0 - 22.7) years follow-up, 87 patients (73%) were alive and mean survival was 16.9 years. Survival rates at 5, 10, 15 and 20 years were 91%, 78%, 71% and 50%, respectively. Six patients were re-operated, due to mitral valve dysfunction in three. Mean re-operation free survival was 21.4 years. Echocardiographic follow-up was 75% completed at an average of 64 months; 84% of cases had no or only 1+ mitral regurgitation. Conclusions: In our experience, MVR for DMI had an operative mortality below 1% and a probability of success greater than 95%, with excellent long-term results.
- Published
- 2015
53. Malezas invasoras globales en Saccharum spp. L. ex Mukherjee, S.K. 1957 después del impacto del cambio climático.
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Antonio Arévalo, Roberto, Córdova Sánchez, Samuel, José Ambrosano, Edmilson, Beroncini, Edna Ivani, Espinosa García, Francisco Javier, Arévalo Cordero, Lourdes Ársula, Martin, Antonio Chinea, Medina Pitalúa, Juan Lorenzo, and Ambrosano, Guilherme Bovi
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CLIMATE change , *BIOLOGICAL weed control , *SUGAR cane disease & pest resistance , *DWARF plants , *SEED production (Botany) - Abstract
The present paper has objective informer the compartment the Weeds Global Invasive in sugar cane crop Saccharum spp. L. (WWGIS) with climate change for Green House Effect. The WWGIS-Worst Weed Global Invasive in Latina American and Caribbean were selection in the I and II curse of weed biology and management in sugarcane, Tabasco sugarcane, 2010-2013. The results of the first course were highlighted by the participants and corroborated in the second. These plants growth in habitats worm and limited water available. The species selections are: 1) ROOEX-Rottboellia exaltata L.f.1782; 2) TRCYN- Digitaria insularis (L.) Fedde, 1904; 3) CYNDA-Cynodon dactylon (L.) Pers. 1805; 4) CYNPL-Cynodon plectostachyus (K. Schum.) Pilg.1907; 5) CHRPO-Chloris elata Desv, 1831; 6) PANPU-Brachiaria mutica (Forssk.) Stapf, 1919; 7) DIGNU-Digitaria nuda Schumach, 1827; 8) DIGAD-Digitaria ciliaris (Retz.) Koeler, 1802; 9) PANMA-Panicum maximum Jacq. 1781; 10) SORHA-Sorghum halepense (L.) Pers. 1805; 11) CYPRO-Cyperus rotundus L. 1753; 12) SYNPO-Syngonium podophyllum Schott, 1851. Ten plants per square meter of each species were height determined. The WWGIS excluded the total organisms in this habitat. With climate changes, there was an increase of 1.03 °C since 1981, alter their biological behavior, with difficult and onerous weed control. With appearance of dwarf plants and produced seeds in winter. After 2005 the biological comportment were graduates altered with normal seeds productions in spring, summer and winter, showed mini plants 0.10-1.30 m high. The behavior of PMIGS is directly linked to the highest minimum winter temperatures. [ABSTRACT FROM AUTHOR]
- Published
- 2019
54. Resultados a largo plazo de la valvuloplastía mitral con balón
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Martínez R, Gonzalo, Fajuri N, Alejandro, Córdova A, Samuel, Braun J, Sandra, Marchant D, Eugenio, Guarda S, Eduardo, Veas P, Nicolás, Méndez L, Manuel, Lindefjeld C, Dante, Pérez P, Osvaldo, Flores, Alejandra, Valenzuela, Edith, and Martínez S, Alejandro
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Balloon valvuloplasty ,Follow-up studies ,Mitral valve stenosis - Abstract
Background: Mitral balloon valvuloplasty (MBV) is the therapy of choice for the treatment of symptomatic mitral stenosis with suitable anatomy. Although its short and mid-term results are favorable, there is a paucity of information about long-term follow-up. Aim: To assess the late results of MBV. Material and Methods: A cohort of 225 patients aged 8 to 20 years who were subjected to a MBV from 1989 to 2001, was studied. All variables at the time of the procedure, short and long-term results and major events during follow-up (new mitral intervention and mortality) were recorded. Uni and multivariate analysis were used to assess prognosis. Results: The mean follow-up lapse was 13.5 years (range 8 to 20 years). During this period, 88 patients (39.1%) remained event-free and in acceptable functional capacity. Eight percent died, 8% required a second MBV and 43.5% required a surgical mitral valve replacement. A post-procedural area equal or greater to 1.9 cm² was associated with a greater likelihood of free-event survival (log rank test: p = 0.02/Cox proportional regression model: coefficient 0.54, p = 0.04). Conclusions: MBV is effective, although there is a high chance of new interventions in the long-term follow-up. A larger post-procedure mitral area is associated with a better prognosis.
- Published
- 2014
55. Veinte años de cirugía reparadora de la válvula mitral
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Zalaquett S, Ricardo, Latorre S, Gonzalo, Almeida Z, Josefina, Meneses O, Aldo, Muñoz C, Cecilia, and Córdova A, Samuel
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Thoracic surgery ,Mitral valve annuloplasty ,Mitral valve ,Mitral valve insufficiency - Abstract
Background: Mitral valve repair is the preferred procedure for the surgical treatment of mitral valve insufficiency (MI), procedure that we initiated 20 years ago. Aim: To assess our experience and long-term results of mitral valve repair. Patients and Methods: The database of the cardiology department was reviewed for the period between December 1991 and December 2012. A total of 322 patients aged 18 to 89 years (62% males) undergoing mitral valve repair were identified. Long-term survival information was obtained consulting death certificate records of the Chilean Identification Service. The latest echocardiogram available was analyzed. Results: MI was degenerative in 144 patients (45%) and ischemic in 104 (32%). A prosthetic ring was used in all ischemic and in 92% of non-ischemic MI. Operative mortality was 7.5%, 13% in ischemic and 4.4% in non-ischemic MI (p < 0.01). Overall long-term survival was 14.1 years; 9.3 and 16 years for ischemic and non-ischemic MI, respectively (p < 0.001). Survival at 5, 10, 15 and 20 years was 79, 63, 54 and 42%, respectively. For degenerative MI survival at 5 and 10 years was 90 and 76% and for ischemic MI, it was 64 and 44%, respectively (p < 0.001). On a multivariate analysis the main predictors of late mortality were age, associated valvular disease and ischemic etiology. Echocardiographic follow-up was available for 223 patients; MI was absent in 53% and was mild in 29%. Conclusions: In a 20 years follow-up, mitral valve repair for MI had excellent long-term survival and echocardiographic results. The most common etiologies of MI were degenerative and ischemic diseases. The latter had a worst prognosis. The main predictors of long term mortality were age, associated valvular disease and ischemic etiology.
- Published
- 2014
56. Biological nitrogen fixation of fabaceae in acid soils of Tabasco, Mexico
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Córdova-Sánchez, Samuel, Cárdenas-Navarro, Raúl, Peña-Cabriales, Juan José, Castelán-Estrada, Mepivoseth, Lobbit-Phellipe, Cristian, and Vera-Núñez, José Antonio
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Cultivos tropicales ,Tropical crops ,Biomasa fresca ,Suelos de sabanas ,Savanna soils ,Nitrógeno ,México ,Nodules ,Biomasa ,Fijación biológica de nitrógeno ,Rhizobiaceae ,Fresh biomass ,Datos estadísticos ,Fabáceas - Abstract
La fijación biológica de nitrógeno (FBN) es un proceso que ocurre en la naturaleza y representa la fuente de N más barata para los suelos ácidos del trópico húmedo. El objetivo de este trabajo fue cuantificar la cantidad de N fijado por cuatro especies de fabáceas a través de técnicas isotópicas con 15N, en un suelo de sabana en México. Los tratamientos se establecieron bajo un diseño de bloques completos al azar, con cuatro repeticiones. Las variables evaluadas fueron; biomasa fresca (BF), materia seca (MS), número de nódulos (NN), masa seca de nódulos (MSN), Nitrógeno total (Nt) y Nitrógeno fijado biológicamente (Nf). Los resultados muestran que Mucuna deerengiana L. presentó mayor producción de BF y MS (17,50 y 5,47 Mg ha-1) así como MSN (58,79 mg planta-1) y también mayor contenido de Nt y Nf (526,94 y 522,11 kg ha-1) respectivamente, en comparación con Cajanus cajan L., Phaseolus lunatus L. y Sesbania emerus L., especies que mostraron valores bajos en dichas variables. Se concluye que Mucuna deerengiana L. tolera bien los factores desfavorables que predominan en los suelos ácidos y por ello expresa una eficiencia superior a 500 kg ha-1 de Nf; se considera adecuada para aumentar el nivel de nitrógeno en los suelos de sabana sin aplicar fertilizantes químicos. Biological nitrogen fixation is a process that occurs in nature and is the cheapest source of N for humid tropical acid soils. The aim of this study was to quantify the amount of N fixed by species of fabaceae through 15N isotopic techniques, in a savanna soil in Mexico. The treatments were established under a design of a randomized complete block, with four replicates. The variables evaluated were: fresh biomass (FB), dry matter (DM), nodule number (NN), nodule dry mass (NDM), total nitrogen (tN) and biologically fixed nitrogen (fN). Our results show that Mucuna deerengiana L. had higher production of FB and DM (17.50 and 5.47 Mg ha-1), NDM (58.79 mg plant-1) and higher content of tN and fN (526.94 and 522.11 kg ha-1) respectively, compared with Cajanus cajan L., Phaseolus lunatus L. and Sesbania emerus L., species that showed low values in these variables. We conclude that Mucuna deerengiana L. tolerates unfavorable factors prevailing in acid soils and therefore has efficiency greater than 500 kg ha-1 fN; we consider it appropriate to increase the level of nitrogen in savanna soils, without applying chemical fertilizers. Fil: Córdova-Sánchez, Samuel. Universidad Autónoma de Chiapas (México). Centro Maya de Estudios Agropecuarios Fil: Cárdenas-Navarro, Raúl. Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigaciones Agropecuarias y Forestales Fil: Peña-Cabriales, Juan José. Centro de Investigación y Estudios Avanzados (Guanajuato, México) Fil: Castelán-Estrada, Mepivoseth. Colegio de Postgraduados (México). Campus Tabasco. Fil: Lobbit-Phellipe, Cristian. Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigaciones Agropecuarias y Forestales Fil: Vera-Núñez, José Antonio. Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigaciones Agropecuarias y Forestales
- Published
- 2013
57. Long-term results of mitral valve repair for ischemic mitral insufficiency
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Zalaquett S, Ricardo, Flores A, Emilio, Cartajena de la M, Fernando, Bächler S, Pablo, Córdova A, Samuel, Becker R, Pedro, Morán V, Sergio, Irarrázabal LL, Manuel, Muñoz C, Cecilia, and González F, Rodrigo
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Myocardial infarction ,Mitral valve annuloplasty ,cardiovascular system ,cardiovascular diseases ,Mitral valve insufficiency - Abstract
Background: The preferred treatment for ischemic mitral insufficiency is mitral valve repair with a prosthetic ring, because it does not deteriorate left ventricular function, allowing better immediate and long-term results. Aim: To assess long-term results of mitral annuloplasty with a prosthetic ring for ischemic mitral insufficiency. Patients and Methods: One hundred patients (68 men), with a mean age of 65.7 ± 8.6 years were included. They underwent a mitral annuloplasty with a prosthetic ring to treat ischemic mitral insufficiency, between February 1992 and May 2009. Fortyfour had a history of prior myocardial infarction and 46 had an evolving acute coronary syndrome. The inferior left ventricular wall was involved, exclusively or associated with an adjacent wall, in 72 cases. Coronary artery bypass grafts were performed in 92 patients and 32 required intra-aortic balloon pumping at some time during the peri-operative period. Results: Operative mortality was 10% (10 patients). During follow-up 30 patients died, at an average of 39 months after surgery (range: 3-142 months). Actuarial long-term survival rates at 1, 3 and 5 years were 79%, 72% and 64.5%, respectively. Trans esophageal echocardiogram performed in the operating room showed none or minimal residual mitral insufficiency in 96% of the cases. Echocardiographic follow-up was completed in 80% of the survivors; 79% of them had no or minimal mitral insufficiency. Only one patient was re-operated on due to severe mitral insufficiency and 4 required a permanent pacemaker. Conclusions: Considering the critical illness of these patients, good long-term results were observed after treatment of ischemic mitral regurgitation performing a mitral annuloplasty with a prosthetic ring.
- Published
- 2011
58. Miocardiopatía no compactada: una serie de 15 casos
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Enríquez R, Andrés, Baeza V, Ricardo, Gabrielli N, Luigi, Córdova A, Samuel, and Castro G, Pablo
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Isolated non compaction of the ventricular myocardium ,Heart failure ,Cardiomyopathies - Abstract
Background: Non compaction cardiomyopathy is a rare disorder caused by the arrest of myocardial compaction during embryogenesis, leading to a non compacted endocardial layer with marked hypertrabeculation and deep recesses. Aim: To report the clinical and echocardiographic characteristics of a series of 15 adult patients with non-compaction cardiomyopathy. Patients and Methods: We included a total of 15 patients aged 52 ± 17 years (40% males) diagnosed at our echocardiography laboratory between January 2001 and July 2010. Results: Theform of presentation was heart failure in 53% of subjects, syncope in 20%o, ventricular arrhythmias in 13%o and stroke in 7%>. Left ventricular end-diastolic diameter was 66 ±11 mm and estimated ejection fraction was 27 ± 10%>. Apical and/or mid-ventricular segments of the left ventricle were involved in all the cases. Pulmonary hypertension was present in 40%o. The average follow-up was 19 months and no patient died during this period. Sixty seven percent ofthe patients had manifestations of heart failure, 27%o presented sustained ventricular arrhythmias and 20%> had atrial fibrillation orflutter, whereas 13%o had cerebral embolic events. An automated internal cardioverter defibrillator was implanted in 47%o of patients. Conclusions: Non-compaction cardiomyopathy is associated with high cardiovascular morbidity. The diagnosis is made in advanced stages of the disease, with significant dilation and ventricular dysfunction.
- Published
- 2011
59. Reparación valvular mitral en insuficiencia mitral degenerativa: reparabilidad, resultados inmediatos y seguimiento hasta 20 años
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Latorre S, Gonzalo, primary, Almeida Z, Josefina, additional, Besa B, Santiago, additional, Córdova A, Samuel, additional, and Zalaquett S, Ricardo, additional
- Published
- 2015
- Full Text
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60. Guías de acreditación en ecocardiografía del adulto y del laboratorio de ecocardiografía de la Asociación de Ecocardiografía de la Sociedad Interamericana de Cardiología
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RESTREPO, GUSTAVO, LOWENSTEIN, JORGE, GUTIÉRREZ FAJARDO, PEDRO, PAZ ARDAYA, ADOLFO, VIEIRA, MARCELO L. C, SPINA, SALVADOR, CÓRDOVA ALVÉSTEGUI, SAMUEL, BELTRÁN, ÁLVARO, PIZZANO, NELSON, and REVILLA ALCOCER, HÉCTOR
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ACREDITACIÓN ,TÉCNICAS Y PROCEDIMIENTOS DE LABORATORIO-normas ,ADULT ,ADULTO ,LABORATORY TECHNIQUES AND PROCEDURES-standards ,ECOCARDIOGRAFÍA ,ECHOCARDIOGRAPHY ,ACREDITATION - Published
- 2010
61. Tratamiento endovascular de la disección aórtica tipo B mediante endoprótesis
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Mertens M, Renato, Arriagada J, Ivette, Valdés E, Francisco, Krämer Sch, Albrecht, Mariné M, Leopoldo, Bergoeing R, Michel, Braun J, Sandra, Godoy J, Iván, Córdova A, Samuel, Huete G, Alvaro, Vergara G, Jeannette, and Carvajal N, Claudia
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Aortic aneurism ,Aortic dissection ,Stents - Abstract
Background: Dissections that involve the ascending aorta are classified as type A, regardless of the site of the primary intimal tear, and all other dissections as type B. Type B dissections can have fatal ischemic and hemorrhagic complications. In the chronic state, dilatation and rupture can be mortal. Endovascular surgery is a therapeutic alternative, considering the high rate of complications of conventional surgery Aim: To report the results of endovascular treatment of type B aortic dissection. Material and methods: Report of 36 treated patients (30 males) aged 43 to 87 years, with a type B aortic dissection. Seventy eight percent were hypertensive and 39% smoked. The diagnosis was conñrmed by CAT sean. Acute patients were treated for complications and chronic patients, for dilatation. In the operating room, an endoprothesis was placed through the femoral artery, to cover the tear. The tear was located and the lumens were differentiated using angiography and transesophageal echocardiography. Results: All procedures were successful. In 16 acute dissections the indications were malperfusion syndrome or unmanageable hypertension in seven patients and imminent rupture or persistent pain in nine. Twenty chronic patients were operated due to dilatation (mean 6 cm). One patient died due to cardiac failure. One patient had a transient paraparesia and two had pulmonary embolism. No patient died in a follow up períod ranging from 2.5 to 74 months. Four patients required a new aortic endovascular procedure due to progressive dilatation or endoleak. Conclusión: Endovascular treatment of type B aortic dissection has good immediate andlong term results.
- Published
- 2008
62. Cardiac myxoma: Clinical characterization, diagnostic methods and late surgical results
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Becker R, Pedro, Ramírez M, Alejandro, Zalaquett S, Ricardo, Moran V, Sergio, Irarrázaval Ll, Manuel J, Arretz V, Claudio, Córdova A, Samuel, and Arnaiz G, Pilar
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Echocardiography ,cardiovascular system ,Myxoma ,Heart neoplasms - Abstract
Background: Cardiac myxoma is the most common primary cardiac tumor. Aim: To evaluate clinical aspects, diagnostic methods and surgical outcomes in patients with cardiac myxoma. Patients and Methods: AH patients who underwent surgical resection of a cardiac myxoma between January 1973 and December 2004 at our institution, were identified and their medical records and diagnostic data reviewed. Results: Thirty seven patients identified (24 women), with a median age of 54 years (range 2-74). The most common symptom was dyspnea (51%), followed by embolism (24%) and cardiac murmurs (16%). The diagnosis was made by echocardiogram in 84% of patients. The mean tumor size was 4.9 ± 1.3 cm. The tumor was located in the ¡eft atrium in 83% of the patients, right atrium in 8% and ¡eft ventricle in 3%. Two patients had multiple tumors. Surgical approach was transeptal in 51%, left atriotomy in 22%, combined transeptal and roof of the left atrium in 19% and right atriotomy in 8%. The tumor and its attachment base were excised in one piece. There were two operative deaths and five late deaths. The mean follow-up was 11.5 years. The 5, 10, 15 and 20 years survival was 89%, 83%, 75% and 64%, respectively. Two patients had recurrence (5.4%), at 2 and 25years after surgery, respectively, and the recurrence free survival at 10 and 25years was 97% and 73%, respectively. Conclusions: Dyspnea was the most common symptom and echocardiogram the main diagnostic method. Surgical treatment was highly effective, with low mortality and recurrence rate, with good long term survival
- Published
- 2008
63. Comportamiento clínico de los tumores cardíacos desde el feto hasta el adulto: serie multicéntrica de 38 pacientes
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Arnaiz G, Pilar, Toledo G, Isabel, Borzutzky S, Arturo, Urcelay M, Gonzalo, Heusser R, Felipe, Garay G, Francisco, Castillo N, Elisa, Toro R, Lida, Becker R, Pedro, Arretz V, Claudio, and Córdova A, Samuel
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Echocardiography ,Rhabdomyoma ,Myxoma ,Heart neoplasms - Abstract
Background: Cardiac tumors are very uncommon at all ages. There are important clinical differences between children and adults in the behavior of these tumors. Aim: To compare the behavior of primary and secondary cardiac tumors, from fetal age to adults. Patients and Method: Multicentric retrospective analysis of 38 children and adults with cardiac tumors, evaluated with echocardiography between January 1995 and August 2001. Medical records, echocardiographic and radiological examinations, surgical protocols and pathologic examinations were reviewed. Follow-up was obtained through data on medical records or calling patients by telephone. Results: Tumors were diagnosed in 38 patients (13 children and 25 adults), from a total of 31.800 echocardiograms. In children the diagnosis was made by fetal, transthoracic or transesophageal echocardiography in 23.6% and 8% of cases, respectively. Eighty five percent were primary (10 benign and 1 malignant) and 15%, secondary tumors. Fifty four percent were rhabdomyomas and 75% regressed spontaneously. Seventy seven percent were symptomatic and 31% were treated with surgery. During a follow up of 44±35 months, 31% of patients died. In adults, 76% of tumors were diagnosed by transthoracic and 20% by transesophageal echocardiography. Seventy six percent were primary (18 benign and 1 malignant) and 24% secondary tumors. Fifty six percent were myxomas. Ninety two percent were symptomatic and 84% were treated surgically. Twenty percent of patients died in the early postoperative period. No adult patients had a follow-up. Conclusions: Rhabdomyomas were solely found in children. In adults, myxomas are the predominat cardiac tumors. Primary and metastasic malignant tumors are observed both in children and in adults
- Published
- 2006
64. Partial or total replacement of the aortic arch: Experience in 23 patients
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Irarrázaval Ll, Manuel J, Morán V, Sergio, Zalaquett S, Ricardo, Becker R, Pedro, Baeza P, Cristian, Urzúa U, Jorge, Lema F, Guillermo, Canessa B, Roberto, Chamorro S, Gastón, Braun J, Sandra, Córdova A, Samuel, and Garayar P, Bernardita
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Perfusion ,Aortic aneurysm, thoracic ,Hipothermia ,Aorta, thoracic ,cardiovascular system - Abstract
Background: Surgery of the aortic arch is a very complex procedure since it requires protective strategies for the brain, heart and rest of the body. Aim: To communicate our experience in the first 23 total or partial replacements of aortic arch. Material and methods: Retrospective search in the database of the Cardiovascular Surgery Unit for patients subjected to partial or total replacement of the aortic arch since 1998. Results: Between 1988 and 2002, 23 patients were operated. Seventeen had aortic dissection (10 acute and 7 chronic), five had an atherosclerotic aneurysm and one had a traumatic lesion. Thirteen patients were subjected to a replacement of the arch plus ascending aorta, six to a replacement of the arch plus descending aorta and four to a replacement of the arch, ascending and descending aorta. Seven patients had previous operation of the thoracic aorta. Arterial perfusion was done via the femoral artery, axillary artery or a combination of both. A hypothermic circulatory arrest was induced in 22; it was associated with cerebral retro perfusion alone in 8 patients, antegrade cerebral perfusion in 5; isolated or associated axillary perfusion was used in five patients. In seven, procedures on the aortic or mitral valve, or coronary artery operations were added. Operative mortality was 26%, 3 of the 8 patients operated as an emergency and 3 of 15 elective operations. There was no mortality among those without dissection and of 7 chronic dissections, one died. All patients were followed for an average of 45 months. Two patients required reinterventions on the aorta and one for colon cancer. There was one late death of unknown cause. Postoperative complications were agitation, bleeding and temporary vocal cord dysfunction. Conclusions: There is a learning curve, where more extensive operations, particularly those done as emergency or for dissections, had an increased operative risk
- Published
- 2006
65. Long-term results of repair versus replacement for degenerative mitral valve regurgitation
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Zalaquett S, Ricardo, Scheu G, Maximiliano, Camplá C, Cristóbal, Morán V, Sergio, Irarrázaval Ll, Manuel J, Becker R, Pedro, Arretz V, Claudio, Córdova A, Samuel, Braun J, Sandra, Chamorro S, Gastón, and Godoy J, Iván
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Thoracic surgery ,cardiovascular system ,Mitral valve ,cardiovascular diseases ,Mitral valve insufficiency - Abstract
Mitral valve repair is considered better than mitral valve replacement for degenerative mitral regurgitation. Aim: To evaluate late clinical results of mitral valve repair as compared to mitral valve replacement in patients with degenerative mitral regurgitation. Patients and methods: All patients subjected to open heart surgery for degenerative mitral regurgitation between 1990 and 2002 were assessed for surgical mortality, late cardiac and overall mortality, reoperation, readmission to hospital, functional capacity and anticoagulant therapy. Eighty eight patients (48 males) had mitral valve repair and 28 (19 males) had mitral valve replacement (23 with a mechanical prosthesis). Mean age was 59.9 ± 14.8 (SD) and 61.3 ± 14.6 years, respectively. Sixty three percent of patients with repair and 50% of those with valve replacement were in functional class III or IV before surgery. Results: Operative mortality was 2.3% for mitral valve repair and 3.6% for mitral valve replacement (NS). Also, there was no statistical difference in the need of reoperation during the follow-up period between both procedures (2.3% and 0%, respectively). Ninety four percent of the replacement patients but only 26% of the repair patients were in anticoagulant therapy at the end of the follow-up period (p
- Published
- 2005
66. Valve repair surgery for incompetent bicuspid aortic valves
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Zalaquett S, Ricardo, Camplá C, Cristóbal, Scheu G, Maximiliano, Córdova A, Samuel, Becker R, Pedro, Morán V, Sergio, Irarrázaval Ll, Manuel J, Baeza P, Cristian, Arretz V, Claudio, Braun J, Sandra, Chamorro S, Gastón, Godoy J, Iván, and Yáñez D, Fernando
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cardiovascular system ,Heart valve prosthesis implantation ,Cardiovascular surgical procedures ,Aortic valve - Abstract
Background: Surgical valve repair is a good alternative for correction of incompetent bicuspid aortic valve. Aim: To report the early and late surgical, clinical and ecochardiographic results of surgical repair of incompetent bicuspid aortic valves. Patients and methods: Retrospective review of medical records of 18 patients aged 19 to 61 years, with incompetent bicuspid aortic valve in whom a valve repair was performed. Four patients had infectious endocarditis and 17 were in functional class I or II. Follow up ranged from 3 to 113 months after surgery. Results: A triangular resection of the prolapsing larger cusp, which included the middle raphe, was performed in 17 cases; in 13 of these, a complementary subcommisural annuloplasty was performed. In the remaining case, with a perforation of the non-coronary cusp, a pericardial patch was implanted; this procedure was also performed in 2 other cases. In 3 cases large vegetations were removed. Postoperative transesophageal echocardiography showed no regurgitation in 11 patients (62%) and mild regurgitation in 7 (38%). There was no operative morbidity or mortality. There were no deaths during the follow-up period. In 3 patients (17%) the aortic valve was replaced with a mechanical prosthesis, 8 to 108 months after the first operation. Reoperation was not needed in 93%±6,4% at 1 year and 85%±9,5% at 5 years, these patients were all in functional class I at the end of the follow-up period. 60% had no aortic regurgitation, 20% had mild and 20% moderate aortic regurgitation on echocardiographic examination. A significant reduction of the diastolic diameter of the left ventricle was observed, but there were no significant changes in systolic diameter or shortening fraction. Conclusions: Surgical repair of incompetent bicuspid aortic valves has low operative morbidity and mortality and has a low risk of reoperation (Rev Méd Chile 2005; 133: 279-86)
- Published
- 2005
67. Valve repair surgery in infectious endocarditis
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Zalaquett S, Ricardo, Garrido O, Luis, Casas R, Francisca, Morán V, Sergio, Irarrázaval Ll, Manuel J, Becker R, Pedro, Braun J, Sandra, Córdova A, Samuel, Chamorro S, Gastón, Godoy J, Iván, Yáñez D, Fernando, Labarca L, Jaime, and Pérez C, Carlos
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cardiovascular system ,Cardiovascular surgical procedures ,Endocarditis, bacterial ,Surgical procedures, operative) ,cardiovascular diseases - Abstract
Background: Valve replacement has been the treatment of choice for patients with valvular complications of infectious endocarditis (IE). However, excellent results with valve repair allowed it to become a new therapeutic alternative for these patients. Aim: To evaluate the results of valve repair in patients with valvular complications of IE. Patients and Methods: From January 1991 to December 2000, 14 patients with valvular complications of IE underwent valve repair. Mean age was 37.9 ± 14.9. Results: New York Heart Association (NYHA) class was 2.8 ± 0.9. IE was located in the aortic in 6 (42%), in the mitral valve in 4 (29%) and in both valves in 4 cases (29%). Surgical indication was hemodynamic in 50% of the cases, echocardiographic in 29% and septic in 21%. Five aortic valves were bicuspid, 3 mitral valves were myxomatous and the rest were normal. The most common septic lesions were vegetations and leaflet perforations. A total of 23 aortic and 21 mitral valve repair procedures were performed. There were no deaths. Only 1 patient had a surgical complication (renal failure and prolonged mechanical ventilation). Follow-up was 100% complete. There was not late mortality. One patient with bone marrow aplasia required reoperation for a new episode of IE 19 months later. At the end of the follow-up NYHA class was 1.3 ± 0.6 and echocardiography showed a mild or absence of valve regurgitation in most patients. Conclusions: Valve repair surgery in IE has good results, with advantages over valve replacement (Rev Méd Chile 2004; 132: 307-15).
- Published
- 2004
68. Resultados a largo plazo de la valvuloplastía mitral con balón
- Author
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Martínez R, Gonzalo, primary, Fajuri N, Alejandro, additional, Córdova A, Samuel, additional, Braun J, Sandra, additional, Marchant D, Eugenio, additional, Guarda S, Eduardo, additional, Veas P, Nicolás, additional, Méndez L, Manuel, additional, Lindefjeld C, Dante, additional, Pérez P, Osvaldo, additional, Flores, Alejandra, additional, Valenzuela, Edith, additional, and Martínez S, Alejandro, additional
- Published
- 2014
- Full Text
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69. Veinte años de cirugía reparadora de la válvula mitral
- Author
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Zalaquett S, Ricardo, primary, Latorre S, Gonzalo, additional, Almeida Z, Josefina, additional, Meneses O, Aldo, additional, Muñoz C, Cecilia, additional, and Córdova A, Samuel, additional
- Published
- 2014
- Full Text
- View/download PDF
70. Long-term results of mitral valve repair for degenerative mitral insufficiency
- Author
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Zalaquett S, Ricardo, Camplá C, Cristóbal, Córdova A, Samuel, Braun J, Sandra, Chamorro S, Gastón, Irarrázaval Ll, Manuel, Morán V, Sergio, Becker R, Pedro, Godoy J, Iván, and Yáñez D, Fernando
- Subjects
cardiovascular system ,cardiovascular diseases ,Mitral valve insufficiency - Abstract
Background: Mitral valve repair is probably the procedure of choice for the surgical treatment of degenerative mitral insufficiency. Aim: To evaluate the late results of mitral valve repair in degenerative mitral insufficiency. Patients and method: The records of 88 patients who underwent mitral valve repair for degenerative mitral insufficiency from December 1991 through June 2002 were reviewed. Mean age was 59.9 years (range 22 to 82). At least moderate mitral insufficiency was present in every patient. Mean left atrial diameter was 55 mm and mean end diastolic and end systolic left ventricular diameters were 61 and 37 mm respectively. Results: The most common underlying lesion was ruptured chordae tendineae (66%) and posterior leaflet prolapse (68%). The surgical procedure most frecuently performed was quadrilateral resection of the posterior leaflet (68%). A Carpentier-Edwards ring was placed in 97% of patients. An associated procedure was performed in 34%. Operative mortality was 2.3%. A complete follow up was obtained in 93% of cases with a mean of 54±36 months. Overall survival rate was 98% at one year, 88% at 5 and 82% at 10 years. Free of cardiac death rates were 94% at 5 and 89% at 10 years. Only 2 patients were reoperated during follow up, resulting in a 98% reoperation free rate follow up. Functional class improved in all patients at the end of follow up. Late echocardiographic evaluation showed absent or minimal mitral regurgitation in 83% and mild mitral regurgitation in 17%. Conclusion: Good late results have been obtained with mitral valve repair, avoiding the inconveniencies of prosthetic replacement. Therefore, mitral valve repair should be the procedure of choice to treat degenerative mitral insufficiency (Rev Méd Chile 2003; 131: 1355-64).
- Published
- 2003
71. Treatment of severe respiratory failure with cardiopulmonary extracorporeal assistance
- Author
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Castillo F, Luis, Velasco L, Soledad, Irarrázabal Ll, Manuel José, Garayar P, Bernardita, Hernández P, Glenn, Córdova A, Samuel, Romero P, Carlos, and Bugedo T, Guillermo
- Subjects
Cardiopulmonary resuscitation ,Respiratory insufficiency ,distress syndrome, adult - Abstract
Cardiopulmonary extracorporeal assistance is a high complexity procedure for patients with acute respiratory failure, who have failed conventional ventilatory support. A 30 years old female patient with bacterial endocarditis and congestive cardiac failure subjected to cardiac surgery presented severe hypoxemia, right heart failure and pulmonary hypertension, and failed conventional treatment. Cardiopulmonary support with extracorporeal membrane oxygenation (ECMO) reverted the pathophysiologic alterations allowing a successful recovery (Rev Méd Chile 2002; 130: 545-50)
- Published
- 2002
72. Falla cardio-respiratoria severa tratada con asistencia cardiopulmonar extracorpórea: Caso clínico
- Author
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Castillo F,Luis, Velasco L,Soledad, Irarrázabal Ll,Manuel José, Garayar P,Bernardita, Hernández P,Glenn, Córdova A,Samuel, Romero P,Carlos, and Bugedo T,Guillermo
- Subjects
Cardiopulmonary resuscitation ,Respiratory insufficiency ,distress syndrome, adult - Abstract
Cardiopulmonary extracorporeal assistance is a high complexity procedure for patients with acute respiratory failure, who have failed conventional ventilatory support. A 30 years old female patient with bacterial endocarditis and congestive cardiac failure subjected to cardiac surgery presented severe hypoxemia, right heart failure and pulmonary hypertension, and failed conventional treatment. Cardiopulmonary support with extracorporeal membrane oxygenation (ECMO) reverted the pathophysiologic alterations allowing a successful recovery (Rev Méd Chile 2002; 130: 545-50)
- Published
- 2002
73. Aortic valve multiple papillary fibroelastoma complicated with a cerebrovascular accident.: Report of one case
- Author
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Córdova A, Samuel, Zalaquett S, Ricardo, Chuaqui J, Benedicto, Casanegra P, Pablo, and Chamorro S, Gastón
- Subjects
Papillary muscles ,Aortic valve stenosis ,Cardiac surgical procedures - Abstract
The echocardiographic identification of cardiac tumors as cause of embolic episodes is infrequent, and the finding of multiple papillary fibroelastoma is even less common. We report a 70 years old female with a history of a rheumatic mitral valve lesion, subjected to a commissurotomy in 1970. She was admitted with a cerebrovascular accident and the transesophageal echocardiogram revealed the presence of a multiple papillary fibroelastoma in the aortic valve. The patient was operated and the tumor excised, the pathological analysis confirmed the diagnosis. The patient was discharged in good conditions and after 8 months of follow up, she has no neurological abnormality and is in functional class I (Rev Méd Chile 2001; 129: 1056-60).
- Published
- 2001
74. Fibroelastoma papilar múltiple de válvula aórtica complicado de accidente vascular encefálico embólico.: Caso clínico
- Author
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Córdova A,Samuel, Zalaquett S,Ricardo, Chuaqui J,Benedicto, Casanegra P,Pablo, and Chamorro S,Gastón
- Subjects
Papillary muscles ,Aortic valve stenosis ,Cardiac surgical procedures - Abstract
The echocardiographic identification of cardiac tumors as cause of embolic episodes is infrequent, and the finding of multiple papillary fibroelastoma is even less common. We report a 70 years old female with a history of a rheumatic mitral valve lesion, subjected to a commissurotomy in 1970. She was admitted with a cerebrovascular accident and the transesophageal echocardiogram revealed the presence of a multiple papillary fibroelastoma in the aortic valve. The patient was operated and the tumor excised, the pathological analysis confirmed the diagnosis. The patient was discharged in good conditions and after 8 months of follow up, she has no neurological abnormality and is in functional class I (Rev Méd Chile 2001; 129: 1056-60).
- Published
- 2001
75. Humoral rejection in heart transplantation: Report of two cases
- Author
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Castro G, Pablo, Arriagada S, Germán, Moreno S, Mauricio, Morán V, Sergio, Becker R, Pedro, Zalaquett S, Ricardo, Godoy J, Iván, and Córdova A, Samuel
- Subjects
Transplantation ,Transplant rejection ,Azathioprine ,Heart transplantation ,Methylprednisolone ,isogeneic - Abstract
Heart transplantation is a therapeutic alternative for selected patients with refractory heart failure. Acute allograft rejection is one of the main causes of early death after transplantation. The cellular rejection is characterized by cellular infiltrates with or without miocyte necrosis. However, some patients develop left ventricular dysfunction due to rejection without evidence of cellular infiltration. In these patients, the rejection is mediated by antibodies and complement. Humoral rejection is a relative rare but potentially fatal form of acute allograft rejection. We report two patients with left ventricular dysfunction secondary to humoral rejection, shortly after cardiac transplantation. Both patients were treated with methylprednisolone, and azathioprine was substituted by cyclophosphamide. One patient underwent plasmapheresis. The clinical outcome was satisfactory and the left ventricular function returned to normal in both cases. The diagnostic and therapeutic strategies for the management of humoral rejection are reviewed (Rev Méd Chile 2000; 128: 1245-49)
- Published
- 2000
76. Programa de fertilización sustentable para plantaciones de cítricos en Tabasco, México.
- Author
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Salgado-García, Sergio, Palma-López, David Jesús, Zavala-Cruz, Joel, Córdova-Sánchez, Samuel, Castelán-Estrada, Mepivoseth, Lagunes-Espinoza, Luz del Carmen, Ortiz-García, Carlos Fredy, del Rivera-Cruz, María, Ventura-Ulloa, Floricel, Marín-Aguilar, Álvaro, Moreno-Caliz, Elvia, and Rincón-Ramírez, Joaquín Alberto
- Published
- 2016
77. Resultados alejados de la cirugía reparadora de la insuficiencia mitral isquémica
- Author
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Zalaquett S, Ricardo, primary, Flores A, Emilio, additional, Cartajena de la M, Fernando, additional, Bächler S, Pablo, additional, Córdova A, Samuel, additional, Becker R, Pedro, additional, Morán V, Sergio, additional, Irarrázabal LL, Manuel, additional, Muñoz C, Cecilia, additional, and González F, Rodrigo, additional
- Published
- 2011
- Full Text
- View/download PDF
78. Miocardiopatía no compactada: una serie de 15 casos
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Enríquez R, Andrés, primary, Baeza V, Ricardo, additional, Gabrielli N, Luigi, additional, Córdova A, Samuel, additional, and Castro G, Pablo, additional
- Published
- 2011
- Full Text
- View/download PDF
79. Insuficiencia tricuspídea aislada
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Flores A, Emilio, primary, Zalaquett S, Ricardo, additional, Gabrielli N, Luigi, additional, Córdova A, Samuel, additional, and eón S, Paula, additional
- Published
- 2009
- Full Text
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80. Tratamiento endovascular de la disección aórtica tipo B mediante endoprótesis
- Author
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Mertens M, Renato, primary, Arriagada J, Ivette, additional, Valdés E, Francisco, additional, Krämer Sch, Albrecht, additional, Mariné M, Leopoldo, additional, Bergoeing R, Michel, additional, Braun J, Sandra, additional, Godoy J, Iván, additional, Córdova A, Samuel, additional, Huete G, Alvaro, additional, Vergara G, Jeannette, additional, and Carvajal N, Claudia, additional
- Published
- 2008
- Full Text
- View/download PDF
81. Mixoma cardiaco: Caracterización clínica, métodos diagnósticos y resultados alejados del tratamiento quirúrgico durante tres décadas de experiencia
- Author
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Becker R, Pedro, primary, Ramírez M, Alejandro, additional, Zalaquett S, Ricardo, additional, Moran V, Sergio, additional, Irarrázaval Ll, Manuel J, additional, Arretz V, Claudio, additional, Córdova A, Samuel, additional, and Arnaiz G, Pilar, additional
- Published
- 2008
- Full Text
- View/download PDF
82. Comportamiento clínico de los tumores cardíacos desde el feto hasta el adulto: serie multicéntrica de 38 pacientes
- Author
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Arnaiz G, Pilar, primary, Toledo G, Isabel, additional, Borzutzky S, Arturo, additional, Urcelay M, Gonzalo, additional, Heusser R, Felipe, additional, Garay G, Francisco, additional, Castillo N, Elisa, additional, Toro R, Lida, additional, Becker R, Pedro, additional, Arretz V, Claudio, additional, and Córdova A, Samuel, additional
- Published
- 2006
- Full Text
- View/download PDF
83. Reemplazo parcial o total del arco aórtico: Experiencia en 23 pacientes
- Author
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Irarrázaval Ll, Manuel J, primary, Morán V, Sergio, additional, Zalaquett S, Ricardo, additional, Becker R, Pedro, additional, Baeza P, Cristian, additional, Urzúa U, Jorge, additional, Lema F, Guillermo, additional, Canessa B, Roberto, additional, Chamorro S, Gastón, additional, Braun J, Sandra, additional, Córdova A, Samuel, additional, and Garayar P, Bernardita, additional
- Published
- 2006
- Full Text
- View/download PDF
84. Resultados alejados de la reparación versus reemplazo en insuficiencia mitral degenerativa
- Author
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Zalaquett S, Ricardo, primary, Scheu G, Maximiliano, additional, Camplá C, Cristóbal, additional, Morán V, Sergio, additional, Irarrázaval Ll, Manuel J, additional, Becker R, Pedro, additional, Arretz V, Claudio, additional, Córdova A, Samuel, additional, Braun J, Sandra, additional, Chamorro S, Gastón, additional, and Godoy J, Iván, additional
- Published
- 2005
- Full Text
- View/download PDF
85. Ciruguía reparadora de la válvula aórtica bicúspide insuficiente
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Zalaquett S, Ricardo, primary, Camplá C, Cristóbal, additional, Scheu G, Maximiliano, additional, Córdova A, Samuel, additional, Becker R, Pedro, additional, Morán V, Sergio, additional, Irarrázaval Ll, Manuel J, additional, Baeza P, Cristian, additional, Arretz V, Claudio, additional, Braun J, Sandra, additional, Chamorro S, Gastón, additional, Godoy J, Iván, additional, and Yáñez D, Fernando, additional
- Published
- 2005
- Full Text
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86. Cirugía valvular reparadora en endocarditis infecciosa
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Zalaquett S, Ricardo, primary, Garrido O, Luis, additional, Casas R, Francisca, additional, Morán V, Sergio, additional, Irarrázaval Ll, Manuel J, additional, Becker R, Pedro, additional, Braun J, Sandra, additional, Córdova A, Samuel, additional, Chamorro S, Gastón, additional, Godoy J, Iván, additional, Yáñez D, Fernando, additional, Labarca L, Jaime, additional, and Pérez C, Carlos, additional
- Published
- 2004
- Full Text
- View/download PDF
87. Resultados alejados de la cirugía reparadora de la insuficiencia mitral degenerativa
- Author
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Zalaquett S, Ricardo, primary, Camplá C, Cristóbal, additional, Córdova A, Samuel, additional, Braun J, Sandra, additional, Chamorro S, Gastón, additional, Irarrázaval Ll, Manuel, additional, Morán V, Sergio, additional, Becker R, Pedro, additional, Godoy J, Iván, additional, and Yáñez D, Fernando, additional
- Published
- 2003
- Full Text
- View/download PDF
88. Falla cardio-respiratoria severa tratada con asistencia cardiopulmonar extracorpórea: Caso clínico
- Author
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Castillo F, Luis, primary, Velasco L, Soledad, additional, Irarrázabal Ll, Manuel José, additional, Garayar P, Bernardita, additional, Hernández P, Glenn, additional, Córdova A, Samuel, additional, Romero P, Carlos, additional, and Bugedo T, Guillermo, additional
- Published
- 2002
- Full Text
- View/download PDF
89. Cirugía de la insuficiencia mitral isquémica
- Author
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Zalaquett S, Ricardo, primary, Garrido O, Luis, additional, Morán V, Sergio, additional, Irarrázaval Ll, Manuel J, additional, Becker R, Pedro, additional, Maturana B, Gustavo, additional, Chamorro S, Gastón, additional, Braun J, Sandra, additional, Godoy J, Iván, additional, and Córdova A, Samuel, additional
- Published
- 2002
- Full Text
- View/download PDF
90. Fibroelastoma papilar múltiple de válvula aórtica complicado de accidente vascular encefálico embólico.: Caso clínico
- Author
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Córdova A, Samuel, primary, Zalaquett S, Ricardo, additional, Chuaqui J, Benedicto, additional, Casanegra P, Pablo, additional, and Chamorro S, Gastón, additional
- Published
- 2001
- Full Text
- View/download PDF
91. Rechazo humoral en trasplante cardíaco: Comunicación de dos casos
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Castro G, Pablo, primary, Arriagada S, Germán, additional, Moreno S, Mauricio, additional, Morán V, Sergio, additional, Becker R, Pedro, additional, Zalaquett S, Ricardo, additional, Godoy J, Iván, additional, and Córdova A, Samuel, additional
- Published
- 2000
- Full Text
- View/download PDF
92. Resultados alejados de la cirugía reconstructora de la insuficiencia mitral
- Author
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Zalaquett S, Ricardo, primary, Chamorro S, Gastón, additional, Braun J, Sandra, additional, Garrido O, Luis, additional, Howard G, Michael, additional, Morán V, Sergio, additional, Irarrázaval LI, Manuel, additional, Maturana B, Gustavo, additional, Becker R, Pedro, additional, Arretz V, Claudio, additional, Córdova A, Samuel, additional, and Sacco C, Carla, additional
- Published
- 1999
- Full Text
- View/download PDF
93. Fijación biológica de nitrógeno por cuatro fabáceas en suelos ácidos de Tabasco, México.
- Author
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Córdova-Sánchez, Samuel, Cárdenas-Navarro, Raúl, Peña-Cabriales, Juan José, Salgado-García, Sergio, Castelán-Estrada, Mepivoseth, Lobbit-Phellipe, Cristian, and Vera-Núñez, José Antonio
- Subjects
- *
NITROGEN fixation , *LEGUME yields , *BIOFERTILIZERS , *ACID soils , *SOILS , *TROPICAL crops , *AGRICULTURAL research - Abstract
Biological nitrogen fixation is a process that occurs in nature and is the cheapest source of N for humid tropical acid soils. The aim of this study was to quantify the amount of N fixed by species of fabaceae through 15N isotopic techniques, in a savanna soil in Mexico. The treatments were established under a design of a randomized complete block, with four replicates. The variables evaluated were: fresh biomass (FB), dry matter (DM), nodule number (NN), nodule dry mass (NDM), total nitrogen (tN) and biologically fixed nitrogen (fN). Our results show that Mucuna deerengiana L. had higher production of FB and DM (17.50 and 5.47 Mg ha-1), NDM (58.79 mg plant-1) and higher content of tN and fN (526.94 and 522.11 kg ha-1) respectively, compared with Cajanus cajan L., Phaseolus lunatus L. and Sesbania emerus L., species that showed low values in these variables. We conclude that Mucuna deerengiana L. tolerates unfavorable factors prevailing in acid soils and therefore has efficiency greater than 500 kg ha-1 fN; we consider it appropriate to increase the level of nitrogen in savanna soils, without applying chemical fertilizers. [ABSTRACT FROM AUTHOR]
- Published
- 2013
94. Autoexploración mamaria en usuarias del Instituto Mexicano del Seguro Social de Teapa, Tabasco, México.
- Author
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Córdova-Cadena, Samuel, González-Pozos, Patricia Vanessa, and Zavala-González, Marco Antonio
- Subjects
- *
BREAST self-examination , *WOMEN , *EARLY detection of cancer , *BREAST cancer risk factors , *BREAST cancer , *CANCER prevention , *HEALTH - Abstract
Objective: To establish the proportion of women of 40 years-old and more, which perform properly breast self-examination in the Family Medical Unit 18 of the Instituto Mexicano del Seguro Social from Teapa, Tabasco, Mexico, in 2011. Methods: Cross-sectional study in a universe of 1457 women. A random sample of 127 women was obtained and aleatorily selected. Socio-demographic and hereditary variables were included and breast self-examination technique was evaluated. The information was taken from clinical files and check lists. Descriptive statistic was obtained. Results: The mean age was 52.7 ± 9.3, with a confidence interval of 40-80 years-old. Women with a primary-school education were the largest group, representing 35.4 %. Family antecedent of breast malign tumor was found in 11 %. The mother was the most frequent parent with this background (42.9 %). Adequate breast self-examination technique was observed in 0.8 %. Conclusions: The proportion of women that performs breast self-examination properly is very low. Associated factors were not found. Educative interventions are required in order to correct this problem. [ABSTRACT FROM AUTHOR]
- Published
- 2015
95. Consumo de nitrógeno por cultivares de caña de azúcar en Tabasco, México.
- Author
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Salgado García, Sergio, Izquierdo Hernández, José, del Carmen Lagunes Espinoza, Luz, Palma López, David Jesús, Córdova Sanchez, Samuel, Ortiz Laurel, Hipólito, and Castelán Estrada, Mepivoseth
- Subjects
- *
SUGARCANE , *NITROGEN fertilizers , *EFFECT of nitrogen on plants , *SUGARCANE growing , *CROP yields , *AGRICULTURE - Abstract
Efficiency in taking nitrogen sugarcane cultivars is not directly related yields stems per hectare. The objectives were to determine the effect of nitrogen fertilization on juice quality, performance, nitrogen demand and profitability. The study was conducted in the sugar factory Azsuremex (Tenosique, Tabasco) during the 2014/2015 cycle plant cane, under culture conditions without supplemental irrigation on soil Cambisol haplico. N rates were evaluated: 0, 120 and 180 kg ha-1 in 10 sugarcane cultivars. The results show that high doses of N adversely affected the quality of the juice. A positive linear response on performance, except MEX 69-290 cultivar presented the highest performance 120 kg.N.ha-1 was observed. N consumption was different between cultivars and increased as the dose of N. The internal efficiency index (EI) of nitrogen utilization ranged from 1.6 to 2.0 kg N per tons stem increased. In five of the evaluated cultivars is profitable fertilize with doses of 120 and/or 160 kg ha-1 of N. [ABSTRACT FROM AUTHOR]
- Published
- 2017
96. [Mitral valve repair for degenerative mitral insufficiency: likelihood of success, early and-long term results at 20 years].
- Author
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Latorre S G, Almeida Z J, Besa B S, Córdova A S, and Zalaquett S R
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Follow-Up Studies, Humans, Male, Middle Aged, Mitral Valve Insufficiency mortality, Retrospective Studies, Survival Rate, Treatment Outcome, Heart Valve Prosthesis Implantation, Mitral Valve Insufficiency surgery
- Abstract
Background: The 2014 Guidelines for the Management of Patients with Valvular Heart Disease require to know the probability of success and operative mortality of Mitral Valve Repair (MVR) for Degenerative Mitral Insufficiency (DMI) at a given institution., Aim: To assess the probability of success, operative mortality and long-term results of MVR for DMI., Patients and Methods: The database of the Cardiovascular Surgery Service was reviewed for the period December 1991 to December 2013. Long-term survival information was obtained from death certificate records of the Chilean Identification Service., Results: One hundred forty seven patients with DMI were identified, all operated by one author (RZ). In 28 (19%) the mitral valve was replaced, including three patients in whom a MVR was intended without success. A successful MVR was performed in 119 patients (81%). The probability of a successful MVR was 97.5% (119 of 122). Prolapsed posterior leaflet was present in 81% and annulus dilatation in 60% of cases. The most frequent surgical procedures were quadrilateral resection (83%) and chordal transfer (13%). A mitral annuloplasty was performed in 92% of cases. Operative mortality was 0.8%. At the end of a 9.9 (0 - 22.7) years follow-up, 87 patients (73%) were alive and mean survival was 16.9 years. Survival rates at 5, 10, 15 and 20 years were 91%, 78%, 71% and 50%, respectively. Six patients were re-operated, due to mitral valve dysfunction in three. Mean re-operation free survival was 21.4 years. Echocardiographic follow-up was 75% completed at an average of 64 months; 84% of cases had no or only 1+ mitral regurgitation., Conclusions: In our experience, MVR for DMI had an operative mortality below 1% and a probability of success greater than 95%, with excellent long-term results.
- Published
- 2015
- Full Text
- View/download PDF
97. [Long term results of mitral balloon valvuloplasty].
- Author
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Martínez R G, Fajuri N A, Córdova A S, Braun J S, Marchant D E, Guarda S E, Veas P N, Méndez L M, Lindefjeld C D, Pérez P O, Flores A, Valenzuela E, and Martínez S A
- Subjects
- Adult, Age Factors, Balloon Valvuloplasty mortality, Epidemiologic Methods, Female, Humans, Male, Middle Aged, Mitral Valve diagnostic imaging, Mitral Valve surgery, Mitral Valve Stenosis diagnostic imaging, Mitral Valve Stenosis mortality, Postoperative Complications, Time Factors, Treatment Outcome, Ultrasonography, Balloon Valvuloplasty methods, Mitral Valve Stenosis surgery
- Abstract
Background: Mitral balloon valvuloplasty (MBV) is the therapy of choice for the treatment of symptomatic mitral stenosis with suitable anatomy. Although its short and mid-term results are favorable, there is a paucity of information about long-term follow-up., Aim: To assess the late results of MBV., Material and Methods: A cohort of 225 patients aged 8 to 20 years who were subjected to a MBV from 1989 to 2001, was studied. All variables at the time of the procedure, short and long-term results and major events during follow-up (new mitral intervention and mortality) were recorded. Uni and multivariate analysis were used to assess prognosis., Results: The mean follow-up lapse was 13.5 years (range 8 to 20 years). During this period, 88 patients (39.1%) remained event-free and in acceptable functional capacity. Eight percent died, 8% required a second MBV and 43.5% required a surgical mitral valve replacement. A post-procedural area equal or greater to 1.9 cm² was associated with a greater likelihood of free-event survival (log rank test: p = 0.02/Cox proportional regression model: coefficient 0.54, p = 0.04)., Conclusions: MBV is effective, although there is a high chance of new interventions in the long-term follow-up. A larger post-procedure mitral area is associated with a better prognosis.
- Published
- 2014
- Full Text
- View/download PDF
98. [Twenty years of mitral valve repair. An experience in 322 patients].
- Author
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Zalaquett S R, Latorre S G, Almeida Z J, Meneses O A, Muñoz C C, and Córdova A S
- Subjects
- Adult, Aged, Disease-Free Survival, Female, Follow-Up Studies, Heart Valve Prosthesis Implantation, Humans, Male, Middle Aged, Mitral Valve Annuloplasty, Mitral Valve Insufficiency etiology, Mitral Valve Insufficiency mortality, Retrospective Studies, Severity of Illness Index, Treatment Outcome, Mitral Valve Insufficiency surgery
- Abstract
Background: Mitral valve repair is the preferred procedure for the surgical treatment of mitral valve insufficiency (MI), procedure that we initiated 20 years ago., Aim: To assess our experience and long-term results of mitral valve repair., Patients and Methods: The database of the cardiology department was reviewed for the period between December 1991 and December 2012. A total of 322 patients aged 18 to 89 years (62% males) undergoing mitral valve repair were identified. Long-term survival information was obtained consulting death certificate records of the Chilean Identification Service. The latest echocardiogram available was analyzed., Results: MI was degenerative in 144 patients (45%) and ischemic in 104 (32%). A prosthetic ring was used in all ischemic and in 92% of non-ischemic MI. Operative mortality was 7.5%, 13% in ischemic and 4.4% in non-ischemic MI (p < 0.01). Overall long-term survival was 14.1 years; 9.3 and 16 years for ischemic and non-ischemic MI, respectively (p < 0.001). Survival at 5, 10, 15 and 20 years was 79, 63, 54 and 42%, respectively. For degenerative MI survival at 5 and 10 years was 90 and 76% and for ischemic MI, it was 64 and 44%, respectively (p < 0.001). On a multivariate analysis the main predictors of late mortality were age, associated valvular disease and ischemic etiology. Echocardiographic follow-up was available for 223 patients; MI was absent in 53% and was mild in 29%., Conclusions: In a 20 years follow-up, mitral valve repair for MI had excellent long-term survival and echocardiographic results. The most common etiologies of MI were degenerative and ischemic diseases. The latter had a worst prognosis. The main predictors of long term mortality were age, associated valvular disease and ischemic etiology.
- Published
- 2014
- Full Text
- View/download PDF
99. [Long-term results of mitral valve repair for ischemic mitral insufficiency].
- Author
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Zalaquett S R, Flores A E, Cartajena de la M F, Bächler S P, Córdova A S, Becker R P, Morán V S, Irarrázabal Ll M, Muñoz C C, and González F R
- Subjects
- Aged, Female, Follow-Up Studies, Humans, Kaplan-Meier Estimate, Male, Mitral Valve Insufficiency mortality, Mitral Valve Insufficiency pathology, Reoperation statistics & numerical data, Survival Rate, Treatment Outcome, Heart Valve Prosthesis Implantation adverse effects, Heart Valve Prosthesis Implantation mortality, Mitral Valve Annuloplasty adverse effects, Mitral Valve Annuloplasty mortality, Mitral Valve Insufficiency surgery
- Abstract
Background: The preferred treatment for ischemic mitral insufficiency is mitral valve repair with a prosthetic ring, because it does not deteriorate left ventricular function, allowing better immediate and long-term results., Aim: To assess long-term results of mitral annuloplasty with a prosthetic ring for ischemic mitral insufficiency., Patients and Methods: One hundred patients (68 men), with a mean age of 65.7 ± 8.6 years were included. They underwent a mitral annuloplasty with a prosthetic ring to treat ischemic mitral insufficiency, between February 1992 and May 2009. Forty four had a history of prior myocardial infarction and 46 had an evolving acute coronary syndrome. The inferior left ventricular wall was involved, exclusively or associated with an adjacent wall, in 72 cases. Coronary artery bypass grafts were performed in 92 patients and 32 required intra-aortic balloon pumping at some time during the peri-operative period., Results: Operative mortality was 10% (10 patients). During follow-up 30 patients died, at an average of 39 months after surgery (range: 3-142 months). Actuarial long-term survival rates at 1, 3 and 5 years were 79%, 72% and 64.5%, respectively. Trans esophageal echocardiogram performed in the operating room showed none or minimal residual mitral insufficiency in 96% of the cases. Echocardiographic follow-up was completed in 80% of the survivors; 79% of them had no or minimal mitral insufficiency. Only one patient was re-operated on due to severe mitral insufficiency and 4 required a permanent pacemaker., Conclusions: Considering the critical illness of these patients, good long-term results were observed after treatment of ischemic mitral regurgitation performing a mitral annuloplasty with a prosthetic ring.
- Published
- 2011
- Full Text
- View/download PDF
100. [Non compaction cardiomyopathy: a series of 15 cases].
- Author
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Enríquez R A, Baeza V R, Gabrielli N L, Córdova A S, and Castro G P
- Subjects
- Adolescent, Adult, Aged, Echocardiography, Female, Follow-Up Studies, Humans, Isolated Noncompaction of the Ventricular Myocardium complications, Magnetic Resonance Imaging, Male, Middle Aged, Retrospective Studies, Young Adult, Isolated Noncompaction of the Ventricular Myocardium diagnosis, Rare Diseases diagnosis
- Abstract
Background: Non compaction cardiomyopathy is a rare disorder caused by the arrest of myocardial compaction during embryogenesis, leading to a non compacted endocardial layer with marked hypertrabeculation and deep recesses., Aim: To report the clinical and echocardiographic characteristics of a series of 15 adult patients with non-compaction cardiomyopathy., Patients and Methods: We included a total of 15 patients aged 52 ± 17 years (40% males) diagnosed at our echocardiography laboratory between January 2001 and July 2010., Results: The form of presentation was heart failure in 53% of subjects, syncope in 20%o, ventricular arrhythmias in 13%o and stroke in 7%>. Left ventricular end-diastolic diameter was 66 ± 11 mm and estimated ejection fraction was 27 ± 10%>. Apical and/or mid-ventricular segments of the left ventricle were involved in all the cases. Pulmonary hypertension was present in 40%o. The average follow-up was 19 months and no patient died during this period. Sixty seven percent of the patients had manifestations of heart failure, 27%o presented sustained ventricular arrhythmias and 20%> had atrial fibrillation or flutter, whereas 13%o had cerebral embolic events. An automated internal cardioverter defibrillator was implanted in 47%o of patients., Conclusions: Non-compaction cardiomyopathy is associated with high cardiovascular morbidity. The diagnosis is made in advanced stages of the disease, with significant dilation and ventricular dysfunction.
- Published
- 2011
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