On the mechanism of accentuation of the first heart sound in mitral stenosis

In 10 patients with mitral stenosis, catheterization of the left ventricle and the left atrium has revealed a considerable increase in dp/dt at the moment of closure of the mitral valve in comparison with 10 healthy controls. Systolic and diastolic pressure and the contractility indicators (dp/dtmax...

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Bibliographic Details
Published in:	Cor et vasa (English ed.) Vol. 26; no. 1; p. 38
Main Authors:	Chestukhin, V V, Martianova IYu, Belova, A E, Baranova, E N, Chernov, V A
Format:	Journal Article
Language:	English
Published:	Czech Republic 1984
Subjects:	Electroencephalography Heart Auscultation Heart Sounds Humans Mitral Valve Stenosis - physiopathology Myocardial Contraction Phonocardiography
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Summary:	In 10 patients with mitral stenosis, catheterization of the left ventricle and the left atrium has revealed a considerable increase in dp/dt at the moment of closure of the mitral valve in comparison with 10 healthy controls. Systolic and diastolic pressure and the contractility indicators (dp/dtmax and dp/dtmax/P) did not differ from the values found in the controls, and Vmax was even reduced. Simultaneously with the change in the dp/dt ratio at the moment of the mitral valve closure there occurred also a proportional change in the Ist heart sound amplitude. The authors therefore suggest that besides anatomical changes, a role in the accentuation of the Ist heart sound in mitral stenosis is played also by the haemodynamic factor - the dp/dt ratio at the moment of the mitral valve closure.
ISSN:	0010-8650