Okumura K, Henthorn R W, Epstein A E, Plumb V J, Waldo A L
Pacing Clin Electrophysiol. 1986 May;9(3):332-42. doi: 10.1111/j.1540-8159.1986.tb04488.x.
Two patients with incessant or nearly incessant episodes of atrioventricular (AV) reciprocating tachycardia were studied and were found to be unique because of the location of a slowly conducting retrograde AV bypass pathway in the left lateral position. During the tachycardia in both patients, negative P waves were present not only in ECG leads II, III, and aVF, but also in leads I and aVL. The R-P'/P'-R ratios were 1.3 and 1.9, respectively. Cardiac electrophysiologic study revealed that in both tachycardias, retrograde ventriculoatrial conduction occurred utilizing a concealed left lateral AV bypass pathway with a long conduction time. Verapamil prolonged conduction over the AV bypass pathway in both patients. One patient was successfully treated with oral verapamil. The other patient underwent successful surgical interruption of the AV bypass pathway.
对两名患有持续性或近乎持续性房室折返性心动过速的患者进行了研究，发现他们很独特，原因是左侧存在一条传导缓慢的逆向房室旁路。在两名患者的心动过速期间，不仅心电图Ⅱ、Ⅲ和aVF导联出现负向P波，Ⅰ和aVL导联也出现负向P波。R-P'/P'-R比值分别为1.3和1.9。心脏电生理研究显示，在两种心动过速中，逆向心室心房传导均通过一条传导时间长的隐匿性左侧房室旁路发生。维拉帕米延长了两名患者房室旁路的传导时间。一名患者口服维拉帕米治疗成功。另一名患者成功接受了房室旁路手术切断。
