title: Multifocality - its prognostic importance in the grading of ventricular ectopy.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000145:classification*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications*