【摘要】 <正> 自从Woodbury和Brady用浮置玻璃微电极记录跳动心脏的心肌细胞动作电位以来,整体记录单个心肌细胞电活动的报道不多。Czarnecka等曾在犬身上,以后Dow-nar等和kleber等在猪身上对急性心肌缺血影响单个心室肌细胞电活动进行了一些研究。Woodbury和Brady除青蛙和豚鼠的心肌细胞动作电位外,对其他哺乳动物的这类记录,则尚未见正式报道。更多还原

【Abstract】 Electrocardiogram (Lead Ⅱ) and the in vivo action potentials of a single ventricular muscle fiber picked up by floating ultramicroelectrode inserted intracellularly were recorded simultaneously in several species of mammals.Continuous monitoring of electrocardiogram made sure that the action potentials were recorded when the animals were under good condition.Our results suggest that the Sα T in albino rats might be due to an extraordinarily short plateau (phase 2) of the ventricular action potential.Several points to be noted in recording action potentials of ventricular muscle fiber in rabbit and cat have also been stressed.更多还原