Unidad de Arritmias, Instituto Cardiovascular del Consorcio Hospital General Universitario de Valencia, Valencia, Spain.
Rev Esp Cardiol. 2010 Feb;63(2):229-32. doi: 10.1016/s1885-5857(10)70042-6.
Intermittent atrial undersensing in patients with single-lead VDD pacemakers is regarded as being of limited clinical significance. Nevertheless, in patients with bradycardia-mediated repolarization abnormalities, undersensing could result in RR-interval oscillations due to changes in pacemaker mode and this could act as a trigger for the initiation of torsades de pointes. We report our findings in three patients, which demonstrate the functioning of this trigger mechanism for ventricular arrhythmias.
间歇性心房感知不良在单导线 VDD 起搏器患者中被认为具有有限的临床意义。然而，在心动过缓介导的复极异常患者中，由于起搏器模式的改变，感知不良可能导致 RR 间期的波动，这可能成为尖端扭转型室性心动过速的触发因素。我们报告了三例患者的发现，这些发现证明了这种触发机制对室性心律失常的作用。
