Dilated phase of hypertrophic cardiomyopathy with mid-ventricular obstruction after 20-year follow-up

This paper reports a case of dilated phase in hypertrophic cadiomyopathy wi th mid-ventricular obstruction. Following the first cardiac catheterization and endomyocardial biopsy, the patient was diagnosed as having hypertrophi c cardiomyopathy (HCM) with mid-ventricular obstruction. He had been first diagnosed at the age of 38 years and was subsequently followed for 20 years . Echocardiogram revealed gradually progressive dilatation of the left vent ricle, associated with disappearance of the mid-ventricular obstruction. Th e second cardiac catheterization and endomyocardial biopsy performed at the age of 58 disclosed that the patient was in the dilated phase of HCM with a dip-and-plateau pattern diastolic pressure trace.