🚨 Know the Risk: Lown Grading System for PVCs & Ventricular Arrhythmias 📊 The Lown grading system stratifies Premature Ventricular Complexes (PVCs) by severity—higher grades indicate greater risk of ventricular tachycardia (VT) or fibrillation (VF). 📈 Lown Grades Simplified: Grade 0: No PVCs ✅ Grade 1: Occasional ( 30/hour) ⚠️⚠️ Grade 3: Multiform (varying shapes) ❗ Grade 4: Repetitive A: Couplets (2 consecutive PVCs) ❗❗ B: Salvos (≥3 PVCs) ❗❗❗ Grade 5: R-on-T Phenomenon (PVC on T-wave → high
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