title: The negative inotropic effect of barbiturates on the heart of newborn and adult guinea-pigs.
mesh_terms: D000375:Aging; D000704:Analysis of Variance; D000818:Animals; D000831:Animals, Newborn; D001463:Barbiturates / Q000494:pharmacology*; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D004558:Electric Stimulation; D004562:Electrocardiography; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D006352:Heart Ventricles / Q000187:drug effects; D066298:In Vitro Techniques; D008433:Mathematics; D010424:Pentobarbital / Q000494:pharmacology; D010477:Perfusion; D012631:Secobarbital / Q000494:pharmacology; D013874:Thiopental / Q000494:pharmacology; D013997:Time Factors
chemical_list: D001463:Barbiturates; D012631:Secobarbital; D010424:Pentobarbital; D013874:Thiopental