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本组27例室上性心动过速(SVT),经食道心房调搏(TEAP)确定分型22例(81.5%),其中旁道折返占63.6%,房室结折返占22.7%,表明小儿SVT以旁道折返为最常见,经随访显性旁道折返所致SVT的发生率随年龄增长而下降,推测与小儿传导系统发育规律及旁道电生理特性发生演变有关。另根据本组超速抑制终止SVT的起搏周期与相应的SVT-CL呈高度正相关,故提出公式,起搏周期=06×SVT-CL+88ms为估计适宜终止SVT的起搏周期。本组用TEAP行急性药物试验20例次,指导选择有效药物,可为临床治疗SVT提供依据。
The group of 27 cases of supraventricular tachycardia (SVT), transesophageal atrial pacing (TEAP) identified 22 cases (81.5%), of which 63.6% of the bypass reentry, atrioventricular node return accounted for 22.7%, indicating that children SVT is the most common path of reentry. The incidence of SVT decreased with the increase of age following the follow-up of dominant pathways. It is presumed that the development of SVT is related to the development of pediatric conduction system and the electrophysiological characteristics of the bypass. In addition, according to this group, the pacing cycle of termination SVT and its corresponding SVT-CL are highly positive correlation, so the formula, pacing cycle = 06 × SVT-CL +88 ms is to estimate the suitable termination of SVT pacing cycle. This group with TEAP line acute drug test 20 times, guide the choice of effective drugs, can provide the basis for the clinical treatment of SVT.