RESUMO
PURPOSE: Mitral regurgitation (MR) is a leading cause of mortality in patients with heart failure (HF). Cardiac resynchronization therapy (CRT) has been shown to improve MR in these patients, but maintenance of MR improvement after CRT implantation has not yet been evaluated. We aimed to evaluate the post-CRT improvement pattern of MR in a 6-month follow-up period. MATERIALS AND METHODS: 65 consecutive patients scheduled for CRT implantation with inclusion criteria of moderate to severe heart failure, left ventricular ejection fraction (LVEF)