The second sound-mitral opening snap (A2-OS) interval during exercise in the evaluation of mitral stenosis

Cardiac catheterization and phonocardiography data were obtained from patients with mitral stenosis at rest and during exercise. There was a linear relationship between the percentage decrease of the interval from closure of the aortic valve to the mitral valve opening snap (A2-OS) and the percentag...

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Bibliographic Details
Published in:Circulation (New York, N.Y.) N.Y.), 1966-03, Vol.33 (3), p.399-403
Main Authors: Delman, A J, Gordon, G M, Stein, E, Escher, D J
Format: Article
Language:English
Subjects:
Adult
Cardiac Catheterization
Exercise Test
Humans
Middle Aged
Mitral Valve Stenosis - diagnosis
Phonocardiography
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Summary:Cardiac catheterization and phonocardiography data were obtained from patients with mitral stenosis at rest and during exercise. There was a linear relationship between the percentage decrease of the interval from closure of the aortic valve to the mitral valve opening snap (A2-OS) and the percentage increase [see figure in the PDF file] of the left atrial mean pressure from rest to exercise. The duration of the A2-OS interval was an effective indicator of the level of the left atrial mean pressure during exercise. The duration of the A2-OS interval during exercise allowed separation of patients with mild stenosis from those with moderate or severe stenosis but could not be used to distinguish moderate stenosis from severe stenosis.
ISSN:0009-7322
1524-4539
DOI:10.1161/01.CIR.33.3.399