QRS duration and echocardiographic evidence of left ventricular dyssynchrony in patients with left ventricular systolic dysfunction.

Objective: To determine the association between left ventricular (LV) dyssynchrony assessed by tissue Doppler imaging (TDI) in patients with left ventricular ejection fraction (LVEF) < 35% and prolonged ventricular depolarization on electrocardiography.

Study Design: A cross-sectional study.

Place And Duration Of Study: The Aga Khan University, Karachi, from June to September 2007.

Isolated non-compaction of left ventricular myocardium.

Isolated non-compaction of the left ventricle is a distinct form of cardiomyopathy. It may be idiopathic or secondary to an identifiable disease. The condition usually presents with symptoms of cardiac failure.