Time	Events
Day 0	Hospitalization for cardiac failure due to permanent atrial fibrillation with fast ventricular rate
Day 1	Echocardiography: major dilatation of the coronary sinus (CS)
Day 5	Failure of the rate control treatment, decision to implant a single-chamber pacemaker (PM) and to perform an atrioventricular (AV) node ablation to control heart rate (HR)
Day 8	Bilateral superior vena cava (SVC) were seen on cardiac computed tomography (CT) scan with the left SVC draining to CS
Day 10	Implantation of a single-chamber PM on the right side
Day 11	AV node ablation failure owing to the right atrium access inability. Cardiac CT scan confirmed an inferior vena cava abnormality. HR control reinforcement