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Supraventricular Tachycardia with Aberrancy ECG

ECG Findings:

1. Atrial Fibrillation with a Rapid Ventricular Response

2. Left Bundle Branch Block

Any tachycardic rhythm with a left or right bundle branch block that is NOT ventricular tachycardia is considered "supraventricular tachycardia with aberrancy". This would even include sinus tachycardia with a right or left bundle branch block, atrial fibrillation/flutter with a right or left bundle branch block or AVNRT with a right or left bundle branch block.