[Extrasystole and its treatment].
D001145:Arrhythmias, Cardiac / Q000628:therapy*; D005117:Cardiac Complexes, Premature; D004562:Electrocardiography; D011342:Procainamide / Q000628:therapy*; D011802:Quinidine / Q000628:therapy*
D011802:Quinidine; D011342:Procainamide
ARRHYTHMIA/therapy; ELECTROCARDIOGRAPHY; PROCAINE AMIDE/therapy; QUINIDINE/therapy