title: Relationship of the left ventricular and apical first sounds to the left ventricular pressure derivative.
mesh_terms: D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D006326:Heart Auscultation; D006347:Heart Sounds; D008838:Microcomputers; D009200:Myocardial Contraction; D010701:Phonocardiography