Brugada ECG vs Incomplete Right Bundle Branch Block (iRBBB) Why this differentiation matters Brugada pattern is a malignant channelopathy associated with sudden cardiac death, while incomplete RBBB is usually a benign conduction variant. Mislabeling Brugada as iRBBB can be fatal; overcalling iRBBB as Brugada can lead to unnecessary anxiety and ICD implantation. --- 1. Basic Definitions Brugada ECG Pattern Primary repolarization abnormality Genetic sodium-channel disorder Characteristic ST-segment elevation in V1–V3 Risk of ventricular fibrillation and sudden death Incomplete RBBB (iRBBB) Depolarization abnormality Delay in right ventricular conduction Common in healthy individuals Usually asymptomatic and benign --- 2. ECG Morphology: Side-by-Side Comparison QRS Duration Brugada: QRS usually <120 ms iRBBB: QRS <120 ms, but with RBBB morphology --- V1–V2 Pattern (Key Differentiator) Brugada Pseudo-RBBB appearance ST elevation ≥2 mm ST segment is coved or saddleback Terminal QRS bl...
Cardiology Notes: Clinical Cases including ECG, Echocardiography, Cath, and MOCK Exams to sharpen your cardiology data interpretation skills. Healthcare is stressful!!! Learning cardiology shouldn't be !!!
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