[Determinants of the rate of myocardial relaxation].
The main mechanical determinant of the rate of the myocardium isometric relaxation was found to be the final-systolic length (LK.C.) in cats and frogs. Adrenaline accelerated the relaxation by shortening the LK.C. and by its "own" effect, the latter being obvious in fixed values of the LK.C. An increase in the stimulation rate shortened the LK.C. as well but decelerated the relaxation in fixed values of the LK.C. The mechanisms of control of the rate of the myocardium relaxation, are discussed.
F A
FA
Bliakhman
V Ia
VIa
Izakov
Iu L
IuL
Protsenko
D000818:Animals; D002415:Cats; D004558:Electric Stimulation; D004837:Epinephrine / Q000494:pharmacology; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects; D013599:Systole; D013997:Time Factors
D004837:Epinephrine
Determinanty skorosti rasslableniia miokarda.