[Dysrhythmias following cardiac surgery].
The precise mechanism of various dysrhythmias following cardiac surgery remains unknown. The sinoatrial node (SAN) tissue flow is important to maintain sinus rhythm, especially, after maze operation. The minimum requirement for maintaining sinus rhythm was assumed to be more than 10 Laser Doppler Flowmeter units from an experimental study using dogs, subjected to SAN artery blockade+various types of right atrial wall division. The AH interval was prolonged by division of the epicardium on anterior internodal tract, whilst it was decreased in case of the posterior internodal tract. The influence of injury to the autonomic nerves beneath the epicardium on the SAN and AVN function should be considered in maze operation. Cryoablation may be a beneficial procedure for prevention of autonomic nerve function.
Yamashiro
T
T
Kochi Medical School, Department of Surgery II.
D000818:Animals; D001919:Bradycardia / Q000209:etiology / Q000517:prevention & control; D004285:Dogs; D006801:Humans; D011183:Postoperative Complications; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000517:prevention & control