本文采用经食道程序心房期前刺激法(PAS)及连续心房起搏法(CAP),测定了83名正常人和23例病态窦房结综合征(SSS)患者自主神经阻滞(ANB)前后的SACTp和SACTc。本文就无创性SACT测定的方法学及影响因素进行了分析讨论,并提出SACT的正常上限。结果表明,自然条件下SACTp为230毫秒,SACTc为280毫秒;在ANB后分别为189和186毫秒,认为在ANB后采用经食道起搏间接法测定SACT,其可靠性增加,目前在临床上仍有一定的实用价值。 In this study, we used transesophageal atrial pacing (PAS) and continuous atrial pacing (CAP) to measure the changes of autonomic nerve block (ANB) in 83 normal subjects and 23 patients with sick sinus syndrome (SSS) SACTp and SACTc. In this paper, the methodology and influencing factors of noninvasive SACT determination were discussed and discussed, and the normal upper limit of SACT was proposed. The results showed that SACTp was 230 milliseconds and SACTc was 280 milliseconds under natural conditions and 189 and 186 milliseconds after ANB respectively. It was considered that the reliability of SACT was increased by transesophageal pacing indirect method after ANB and is still clinically still Has some practical value.