Fig. 3From: Reiterative ventricular fibrillation caused by R-on-T during temporary epicardial pacing: a case reportECG and pressure waveform during the first episode of ventricular fibrillation. This ECG shows the R-on-T phenomenon resulting from undersensing of a PVC. A pacing spike hit the T wave (large arrow) following a PVC (small arrow)Back to article page