[Evaluation of elasticity by means of length-tension relationships in a model of isolated ventricular myocardium from rat and cat papillary muscle under conditions of contracture (author's transl)].


Increase of Ca2+ concentration to 7.5 mM in the presence of 10 mM or 20 mM caffeine shifted length-tension relationships of 5 rat trabecular muscles and 5 cat papillary muscles to higher tensions. At 1max diastolic tension was enhanced from (formula: see text), for all measured points of stress-strain relationships after the increase of diastolic tension by… (More)