title: Effect of verapamil of frequency-force relationship in isolated dog left ventricular muscle.
mesh_terms: D000818:Animals; D004285:Dogs; D005260:Female; D006352:Heart Ventricles; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects*; D014700:Verapamil / Q000494:pharmacology*
chemical_list: D014700:Verapamil