CTICasesCoronary Sinus Defibrillation Lead
Imaging findings
Chest radiographs show a left pectoral CRT-D device with four leads. In addition to the standard right ventricular and coronary vein pacing leads, an extra defibrillation shock coil lead is positioned within the coronary sinus.
Key takeaways
Achieving a satisfactory defibrillation threshold can sometimes be challenging. In patients with high thresholds, cardiologists may deploy an additional shock coil lead in the coronary sinus to optimize the vector configuration for successful defibrillation.
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