Mossuti E, Elia F, Martello G, Brancati B
Divisione di Cardiologia, Ospedale Umberto I, Siracusa, Italy.
Pacing Clin Electrophysiol. 1990 Dec;13(12 Pt 1):1563-6. doi: 10.1111/j.1540-8159.1990.tb06853.x.
A 65-year-old patient with a chief complaint of syncope had an ECG with ventricular preexcitation and intermittent second-degree atrioventricular (AV) block. AV conduction was maintained by the accessory pathway only, with no evidence of AV nodal conduction. Electrophysiological study demonstrated that the QRS duration and morphology did not increase with atrial pacing; however, A-H prolongation occurred with increased pacing rates.
一名65岁以晕厥为主诉的患者,其心电图显示有室性预激和间歇性二度房室传导阻滞。房室传导仅通过旁路维持,无房室结传导证据。电生理研究表明,心房起搏时QRS波时限和形态未增加;然而,随着起搏频率增加,A-H间期延长。