单相动作电位(monophasic action potential,MAP)是心肌细胞群的电活动。传统记录心外膜MAP的方法是在开胸条件下进行的。保持家兔在清醒闭胸状态下用特制的电极经局麻的胸壁穿刺入纵隔,在心包壁层记录MAP的方法,国内外未见报道。本文旨在介绍这种方法,并与麻醉开胸后记录的结果进 Monophasic action potential (MAP) is the electrical activity of the cardiomyocyte population. Traditional methods of recording epicardial MAP are performed under thoracotomy. To keep the rabbit in a state of awake chest closed with a special electrode through the local anesthesia chest wall puncture into the mediastinum in the pericardial wall to record MAP, no reports at home and abroad. This article aims to introduce this approach, and record the results with anesthesia after thoracotomy