🔴 R-on-T Phenomenon: A Silent Killer in Arrhythmias! ⤵️ 🔹Definition: A premature ventricular contraction (PVC) or impulse that lands on the T wave—the heart's vulnerable repolarization phase—dramatically increasing the risk of lethal arrhythmias. 🔹Mechanism: During this relative refractory period, an ectopic beat can create chaotic, disorganized electrical activity, potentially triggering ventricular tachycardia (VT), ventricular fibrillation (VF), or Torsades de Pointes. ⚠️ Common Triggers/C
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