Premature ventricular beats.
D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D005117:Cardiac Complexes, Premature / Q000175:diagnosis* / Q000503:physiopathology; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged