title: Effects of verapamil on the contractile force in the glycerinated dog heart muscles.
abstract: The effect of Ca-antagonist on the contractile apparatus was investigated in glycerinated cardiac papillary muscle preparations obtained from canine hearts. The results showed that maximal developed tension (P0) was enhanced significantly by 5 mg/liter of verapamil, and the augmentation of contractility was dependent on the concentrations of verapamil. As a conclusion, Ca-antagonist appeared to be a potentiating agent of the contractile force on the contractile apparatus.
mesh_terms: D000818:Animals; D004285:Dogs; D005990:Glycerol / Q000494:pharmacology; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects*; D014700:Verapamil / Q000494:pharmacology*
chemical_list: D014700:Verapamil; D005990:Glycerol