The effect of distension of the left ventricle of the heart on the length of the individual myocardial fibers |
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Authors: | Panagiotis C Voukydis MD DMSc PhD |
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Institution: | (1) Biometrics Laboratory, Boston University Medical Center, Boston, Massachusetts;(2) Present address: Winnipeg General Hospital, Winnipeg, Manitoba, Canada |
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Abstract: | Based on the ellipsoid model of the left ventricle and the helicoidal course of the left ventricular myocardial fibers, a
theory has been developed for calculating the length of the individual myocardial fibers. Numerical solutions of the final
equation show that when the left ventricle is distended, the increase in length of the myocardial fibers is not uniform throughout
the thickness of the myocardial wall. It was shown that with increasing dimensions of the left ventricle, the distension of
the myocardial fibers becomes smaller as one advances from the endocardium to the middle layer of fibers, whereas it increases
as one advances from the middle layer to the epicardial layer. The mechanism by which this effect is brought about as well
as its physiological implications are discussed. |
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Keywords: | |
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