title: Spontaneous ventricular parasystole initiating ventricular tachycardia.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006333:Heart Failure / Q000209:etiology; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D011802:Quinidine / Q000627:therapeutic use; D013610:Tachycardia / Q000209:etiology* / Q000628:therapy
chemical_list: D011802:Quinidine