<prompt> Most common arrhythmia after reperfusion syndrome isAIVRVTVentricular fibrillationPSVT  <response>: AIVR is currently defined as an enhanced ectopic ventricular rhythm with at least 3 consecutive ventricular beats, which is faster than normal intrinsic ventricular escape rhythm 40 bpm, but slower than ventricular tachycardia at least 100-120 bpm Ref Harrison 20th edition pg 1432 