Kühlkamp V, Haasis R, Seipel L
Department of Internal Medicine III, Eberhard-Karls-University Tübingen, Germany.
Eur Heart J. 1990 Sep;11(9):857-62. doi: 10.1093/oxfordjournals.eurheartj.a059809.
In a patient with frequent paroxysmal supraventricular tachycardia, an electrophysiologic study was performed. Although by programmed atrial stimulation only double AV nodal pathways could be documented, three distinct forms of AV nodal reentrant tachycardia could be induced. By programmed atrial stimulation a typical AV nodal reentrant tachycardia was initiated, by programmed ventricular stimulation, an AV nodal reentrant tachycardia was induced with an antegrade conduction time of 215 ms and a retrograde conduction time of 160 ms. Furthermore, a third form of tachycardia was induced with alternating cycle length due to two different antegrade conduction times, whereas retrograde conduction time was almost identical, irrespective of the antegrade conduction time. The patient received betaxolol (20 mg day-1); during a second electrophysiologic study, the tachycardia could not be induced, and it did not occur spontaneously during a follow-up period of 14 months.
对一名频发阵发性室上性心动过速患者进行了电生理研究。尽管通过程控心房刺激仅能记录到双房室结径路，但可诱发三种不同形式的房室结折返性心动过速。通过程控心房刺激诱发了典型的房室结折返性心动过速，通过程控心室刺激，诱发了房室结折返性心动过速，其前传时间为215毫秒，逆传时间为160毫秒。此外，还诱发了第三种形式的心动过速，其周期长度交替变化，原因是两种不同的前传时间，而逆传时间几乎相同，与前传时间无关。该患者接受了倍他洛尔（20毫克/天）治疗；在第二次电生理研究期间，未能诱发心动过速，且在14个月的随访期内未再自发发作。
