Introduction: The Fontan procedure, used to palliate univentricular physiology, eliminates direct venous access to the ventricle and complicates implantable cardioverter-defibrillator (ICD) placement.
Methods And Results: We describe two patients with Fontan palliation who underwent a novel transvenous approach to ICD placement. The approach uses a transvenous bipolar lead placed in a coronary sinus branch for ventricular sensing, and a defibrillation lead placed in the right atrium for atrial sensing and ventricular defibrillation.
Conclusion: Transvenous ICD implantation is possible in some patients with an atriopulmonary Fontan. This approach avoids a redo sternotomy for epicardial leads and excludes the need for lead placement in the systemic circulation.
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