The mechanism by which rapid pacing induces ventricular fibrillation (VF) is unclear.

Alterations of pacemaker program or rapid pacing were not observed.

These findings support a key role for both CV and ERP restitutions in the initiation of VF by rapid pacing.

To avoid the occlusion of the coronary or brachiocephalic artery (BCA) due to stent graft migration, we used right ventricular rapid pacing and BCA ballooning.

"But how is this?" he cried, stopping short in his rapid pacing up and down the room.