title: Human ventricular refractoriness. II. Effects of procainamide.
mesh_terms: D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000187:drug effects*; D006352:Heart Ventricles / Q000294:innervation*; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction / Q000187:drug effects; D010138:Pacemaker, Artificial; D011342:Procainamide / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D011342:Procainamide