ISSN:
1741-0444
Keywords:
Echocardiogram
;
Fast Fourier transform
;
First heart sound
;
Membrane vibration
;
Mitral-leaflet closing velocity
;
Phonocardiogram
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
Notes:
Abstract A mathematical model is presented to relate mitral valve leaflet closing velocity to the subsequent vibrational magnitude following valve closure. This relationship is investigated experimentally by means of phonocardiographic and echocardiographic recordings from 17 human subjects. Fast Fourier transform analysis of digitised first heart sounds from each subject reveals that the sound intensities in different frequency bands are not uniformly related to the valve-leaflet closing velocity, obtained from the anterior mitral leaflet echocardiogram. It is found that, in the frequency range up to 150 Hz, closing velocity correlates best with sound intensity in the 30–45 hz bandwidth.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02442408
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