[Nature of the "length-force" relationship in mammalian heart muscle].
Alteration of myocardial contractile state (a transitional process) is shown to be associated with changes of muscle length or with 3-min pause. The drugs which block the propagation of AP along the T-tubular system, induce a less obvious response of the lengthening alone. An increase of the muscle length seems to lead to improvement of propagation along the T-tubular system and to involve "additional" functional units.
D000818:Animals; D001696:Biomechanical Phenomena; D001699:Biometry; D004558:Electric Stimulation; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D010210:Papillary Muscles / Q000033:anatomy & histology / Q000502:physiology*; D011817:Rabbits; D051381:Rats; D016276:Ventricular Function
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