Single lead catheter of implantable cardioverter-defibrillator with floating atrial sensing dipole implanted via persistent left superior vena cava

Figure 1 Final position of implantable cardioverter defibrillator sensing dipole. A: Fluoroscopic posteroanterior view during implantation; B: Chest X-ray after implantation. Note the position of atrial sensing dipole (white arrow) and defibrillation coil (black arrow).

Figure 2 Ventricular fibrillation event.

Figure 3 Trends of atrial and ventricular sensing during 10 mo of follow-up. FU: Follow-up.