title: [Sound level and frequency field of the 1st heart sound during various contractility conditions of the myocardium].
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000187:drug effects; D004562:Electrocardiography; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D006326:Heart Auscultation; D006339:Heart Rate / Q000187:drug effects; D006347:Heart Sounds; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D008297:Male; D010701:Phonocardiography; D011433:Propranolol / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology
chemical_list: D012965:Sodium Chloride; D011433:Propranolol; D007545:Isoproterenol
vernacular_title: Schallpegel und Frequenzbereich des 1. Herztones während verschiedener Kontraktilitätszustände des Myokards