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研究静注 ATP 对正常对照组、心动过缓组、窦房结功能低下组的 SCL_(max)的影响,发现用药后3组病例的 SCL_(max)均较用药前延长(P<0.01),且窦房结功能低下组的 SCL_(max)较对照组和心动过缓组延长更为明显(P<0.01),若以正常组 CSCL363ms((?)+2s)和 SCLI148%((?)+2s)为正常值的上限,则窦房结功能低下组的 CSCL 全部超过此值,SCLI 有72.22%异常;SCLI 诊断窦房结功能低下的敏感性、特异性和准确性分别为72.22%、65.78%、86.84%。故认为静注 ATP 对协助诊断隐匿性窦房结功能低下有一定的价值。
To investigate the effect of intravenous infusion of ATP on SCL_ (max) in normal control group, bradycardia group and sinus node dysfunction group. SCL_ (max) of three groups after treatment were found to be longer than before treatment (P <0.01) (P <0.01). Compared with control group and bradycardia group, the SCL max of sinus node dysfunction group was significantly longer than that of control group and bradycardia group (P <0.01) 2s) was the upper limit of normal, then the CSCL in the sinus node dysfunction group exceeded this value, 72.22% SCLI abnormalities; the sensitivity, specificity and accuracy of SCLI in the diagnosis of sinus node dysfunction were 72.22%, 65.78 %, 86.84%. Therefore, intravenous injection of ATP to assist in the diagnosis of occult sinus node dysfunction have a certain value.