Left Ventricle Contraction models

One can study the physiology and the mechanics of cardiac function on many levels. These include details of muscle contractions from the anatomical, physiological, and model based descriptions as well as the gross functioning of the various heart chambers such as the left ventricle. Study of the chamber performance can again be carried out at the anatomical, physiological, and model based levels. This paper deals with some model based descriptions of the functioning of the left ventricle and of necessity includes some model based descriptions of muscle contraction. 

So called 3-D contraction pattern or wall motion analysis from one or two ventricular contours needs similar assumptions as for volume determination (Heintzen, Biirsch, 1978). The computer models - which can be derived for further analysis - are assuming multiple elliptical cross sections for the left ventricle. The methodology we use has been described earlier (Heintzen et al., 1974). For normalization purposes in regional contraction and relaxation studies... 

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