Furuse A, Kotsuka Y, Asano K
Jpn J Surg. 1983 Mar;13(2):146-51. doi: 10.1007/BF02469536.
Epicardial potentials of the sinus node, the right atrium, and the right ventricle were recorded in dogs during cold potassium-induced cardioplegia. We found that the sinus node fibers were more resistant to the cardioplegia than were the other myocardial fibers. When the cardioplegia rendered the atrial muscle inexcitable, the high frequency atrial potential was delayed and then abolished in the sinus node electrogram, and a smooth tracing similar to the action potential of the sinus node cell appeared. These findings should be pertinent for the cardiac surgeon attempting to avoid surgically-induced sinoatrial arrhythmias.
在冷钾诱导的心脏停搏期间，记录了犬窦房结、右心房和右心室的心外膜电位。我们发现，与其他心肌纤维相比，窦房结纤维对心脏停搏更具抵抗力。当心脏停搏使心房肌失去兴奋性时，高频心房电位在窦房结电图中延迟，然后消失，出现类似于窦房结细胞动作电位的平滑描记图。这些发现对于试图避免手术引起的窦房性心律失常的心脏外科医生来说应该是相关的。
