title: Significance of ectopic beats.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000150:complications / Q000453:epidemiology / Q000503:physiopathology; D005117:Cardiac Complexes, Premature; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D005082:Physical Exertion; D014693:Ventricular Fibrillation / Q000150:complications