Long-term effect of pulmonary valve replacement on QRS duration in patients with corrected tetralogy of Fallot

Abstract

In our study, we observed a decrease in QRS duration directly after surgery, followed by a steady increase, in patients with a preoperative QRS >150 ms. The beneficial effect of pulmonary valve replacement on QRS duration was transient. The risk of developing ventricular arrhythmias after surgery was substantial when preoperative QRS was > or =180 ms, but mortality remained low.