The clinical value of frequency analysis of the first heart sound in myocardial infarction

A sensitive technic for frequency analysis of the first heart sound (S 1 ) during isovolumic contraction time (ICT) was developed. Recorded heart sounds were filtered with a dynamic analyzer. Amplitudes of frequencies between 30 and 70 cps were plotted as a percentage of peak total energy of S 1 aga...

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Veröffentlicht in:	Circulation (New York, N.Y.) N.Y.), 1970-06, Vol.41 (6), p.1003-1014
Hauptverfasser:	Adolph, R J, Stephens, J F, Tanaka, K
Format:	Artikel
Sprache:	eng
Schlagworte:	Adult Diagnosis, Differential Elasticity Electrocardiography Heart - physiology Heart Auscultation Heart Valve Prosthesis Heart Ventricles - physiopathology Humans Male Middle Aged Mitral Valve Stenosis - physiopathology Models, Biological Muscle Contraction Myocardial Infarction - diagnosis Phonocardiography Pulmonary Embolism - physiopathology
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