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A Difficult Case of Atrial Tachycardia

A 60-year-old male with a history of prior ablation for typical cavotricuspid isthmus-dependent atrial flutter presented to us with recurrent palpitations. The surface 12-lead EKG was consistent with atrial tachycardia and ablation was planned. The patient was found to have multiple marcroreentrant left atrial tachycardias utilizing areas of scar as substrate. Isthmuses of tissue with fractionated electrograms assocociated with the scars were targets for ablation.

Credits: Meruka Hazari MD; Deepak Saluja MD

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Introduction to AFib
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