Prognostic Significance of Non-Dilated Left Ventricular Size and Mitral Regurgitation in Patients With Dilated Phase of Hypertrophic Cardiomyopathy

摘要

Although a subtype of hypertrophic cardiomyopathy (HCM), dilated phase of HCM (D-HCM) characterized by left ventricular (LV) systolic dysfunction, has been reported to have a poor prognosis, some patients with D-HCM survive for a relatively long period. The degree of LV dilatation and functional mitral regurgitation (MR) are generally thought to be important predictors of poor prognosis in patients with LV systolic dysfunction. However, there is little information available on the relations among LV size, presence of significant MR. and prognosis in D-HCM patients.