average magnitude
9.Experiments were carredd out on the curarized intact rats under arti- ficial respiration. There was a natural attenuation of magnitude cf mya- cardiac action potential(AP)with time. An average natural depression of magnitude of myocardiac AP of 8% at 10′ 17% at 20′ 20% at 30′ and 25% at 40′ was observed.

