Atrial Tachycardias Arising from Ablation of Atrial Fibrillation: A Proarrhythmic Bump or an Antiarrhythmic Turn?
Left atrial appendage (LAA) pacing () results in proximal to distal activation (arrow) of coronary sinus (CS). This is suggestive of blocked () posterolateral mitral isthmus, at least, unidirectionally. CS 9-10—proximal CS, CS 1-2—distal CS.
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