Abstract 18622: Effects of Percutaneous Mitral Balloon Valvuloplasty on Left Atrial Compliance

Introduction: Percutaneous mitral balloon valvuloplasty (PMV) is the treatment of choice for patients with symptomatic mitral stenosis (MS). Rapid improvement in symptoms and hemodynamic parameters can be observed after increasing mitral valve area and decreasing left atrial pressure. However, left atrial pressure has been shown to be influenced by both MS severity and left atrial compliance (Ca). The effects of PMV on Ca are still relatively unknown. The aim of this study is to define the immediate effects of PMV on Ca and to identify factors influencing the changes in Ca post PMV in patients with MS. Methods: We enrolled patients in our institution with MS who underwent successful PMV from December 2012 to May 2014. Transthoracic echocardiography was performed in all the patients pre and 24-h post procedure. PMV was performed by the Inoue technique, guided by echocardiography. Gas analyzes of blood samples from aorta and pulmonary artery were obtained and pressure tracings were recorded from aorta, left...