瓦氏动作在室上速的食管电生理研究

RESEARCH IN THE MECHANISM OF VALSALVA MANEUVER ON SUPRA VENTRICULAR TACHYCARDIA WITH TEAP

为阐明瓦氏动作在终止室上速过程的作用机制。方法 :应用食管心房调搏法 ,测定 14例房室折返性心动过速病人在瓦氏动作和安静时房室不应期和最大房室传导时间 ,并与正常组作对照。结果 :1室上速组房室不应期在瓦氏动作时延长 (12± 16 ) m s,与安静时对比有显著性差异 (P <0 .0 5 ) ;2对照组房室不应期在瓦氏动作和安静时对比无显著性差异(P >0 .0 5 )。结论 :瓦氏动作终止室上速是通过延长房室不应期而起作用。

Objective:To expound the mechanism of Valsalva maneuver to treat supraventricular tachycardia Methods:The atrioventricular refractory period (AVRP) and maximal conduction time(MCT)during Valsalva maneuver and resting state were measured with through esophageal atrial pacemaking(TEAP) in 14 patients with atrioventricular reentrant tachycardia and 10 normal control subjects Results:①In patient group,the AVRPs during resting state and Valsalva maneuver were (286±55)ms,(299±48)ms,respectively (P<0 05) and MCTs were (332±70)ms,(325±104)ms,respectively (P>0 05);②In control group,the AVRPs were (300±60)ms,(300±44)ms,respectively(P>0 05) and the MCTs were (280±84)ms,(293±61)ms,respectively (P>0 05) Conclusion:Valsalva Maneuver terminated supraventricular tachycardia via prolonging atrioventricular refractory period