Resumen

Background: Secondary mitral insufficiency is a strong risk factor for death in end stage cardiomyopathies. The possible correction of mitral regurgitation is now been accepted as an alternative to cardiac transplantation in a special subset of patients. We proposed a surgical approach that consists of implantation of a mitral prosthesis smaller than the annulus and preservation and traction of the papillary muscles to reduce sphericity of the left ventricle. Methods: Between December 1995 and March 2008, 132 cardiomyopathies were operated on including the following etiologies: ischemic (78), idiopathic (49), Chaga’s disease (3), viral (1), and postpartum (1). The patients were analyzed according to clinical criteria, echocardiographic findings and morphology of left ventricle. Results: All patients were in an end-stage phase, requiring >2 hospital admissions over the past 3 months, despite receiving full medication. Furthermore, 8 were in intensive care unit receiving intravenous drugs or intra-aortic balloon counterpulsation, and one was in cardiogenic shock. Hospital mortality was 14.4% (19/132) yet midterm follow-up showed a relatively flat late survival curve, with evidence of improved clinical status, better echocardiographic parameters, and reduction ventricular sphericity. Conclusions: The high early mortality rate is related to other clinical conditions at the time of surgery. However, the resultant flat survival after this early interval offers a promising long-term therapeutic alternative for the treatment of patients in refractory heart failure with cardiomyopathy that is associated to moderate or severe secondary mitral regurgitation.

Palabras clave: Secondary mitral insufficiency cardiomyopathy mitral regurgitation mitral prosthesis-refractary heart failure.

2008-10-24   |   791 visitas   |   Evalua este artículo 0 valoraciones

Vol. 3 Núm.3. Julio-Septiembre 2008 Pags. 110-114 Rev Insuf Cardíaca 2008; III(3)