Abstract
The relation of the phonocardiographic time intervals (Q-I) and (IIA-OS) and the use of two formulas (Q-I, IIA-OS difference versus their ratio) for estimation of left atrial pressure were investigated in 70 cases of pure mitral stenosis.
It was noted that, in cases with normal blood pressure and pluse rate, there was a fair correlation of the two intervals to left atrial pressure. In our studies the best correlation was obtained by using the ratio of these two intervals (Q-I)/(IIA-OS).
These results indicate that it is possible to use a new formula and equation that are dependable for phonocardiographic evaluation of left atrial pressure.
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Selected References
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- Davies J. P. A simple phonocardiographic formula for predicting left atrial pressure in mitral stenosis. Br Heart J. 1967 Nov;29(6):843–851. doi: 10.1136/hrt.29.6.843. [DOI] [PMC free article] [PubMed] [Google Scholar]
- LEO T., HULTGREN H. Phonocardiographic characteristics of tight mitral stenosis. Medicine (Baltimore) 1959 May;38(2):85–101. doi: 10.1097/00005792-195905000-00001. [DOI] [PubMed] [Google Scholar]
- MESSER A. L., COUNIHAN T. B., RAPPAPORT M. B., SPRAGUE H. B. The effect of cycle length on the time of occurrence of the first heart sound and the opening snap in mitral stenosis. Circulation. 1951 Oct;4(4):576–580. doi: 10.1161/01.cir.4.4.576. [DOI] [PubMed] [Google Scholar]
- ORIOL A., PALMER W. H., NAKHJAVAN F., MCGREGOR M. PREDICTION OF LEFT ATRIAL PRESSURE FROM THE SECOND SOUND-OPENING SNAP INTERVAL. Am J Cardiol. 1965 Aug;16:184–188. doi: 10.1016/0002-9149(65)90472-8. [DOI] [PubMed] [Google Scholar]
- RADNER S. Extended suprasternal puncture technique. Acta Med Scand. 1955 Mar 23;151(3):223–227. doi: 10.1111/j.0954-6820.1955.tb10288.x. [DOI] [PubMed] [Google Scholar]