title: [Genesis of the pre-systolic murmur in extrasystole].
mesh_terms: D000818:Animals; D005117:Cardiac Complexes, Premature / Q000503:physiopathology*; D004285:Dogs; D006326:Heart Auscultation; D006339:Heart Rate; D006347:Heart Sounds; D006349:Heart Valve Diseases / Q000175:diagnosis; D006801:Humans; D009200:Myocardial Contraction; D010701:Phonocardiography; D013599:Systole
vernacular_title: Considerações sobre a génese do ruído pré-sistólico em extra-sístoles.