Ventricular tachycardia (VT) often results in hemodynamic compromise (due to minimal ventricular filling time and the absence of atrial kick). What makes this rhythm more ominous is its tendency to transition into ventricular fibrillation. Causes of VT include myocardial ischemia, a PVC landing on a T wave (R-on-T ), cardiac drug toxicity and electrolyte imbalance. Non-sustained VT (a group of 3 or more PVCs) is a run of VT