This case series demonstrates 2 innovative approaches to successful coronary sinus lead placement in the setting of coronary sinus ostial atresia. Use of venous phase coronary angiography, a computed tomography scan with venous phase, or a left-sided upper extremity venogram may help reveal a variant anatomy and guide tool selection. (Level of Difficulty: Advanced.).
Keywords: CRT, cardiac resynchronization therapy; CS, coronary sinus; CSOA, coronary sinus ostial atresia; PLSVC, persistent left superior vena cava; SVC, superior vena cava; biventricular pacemaker; coronary sinus lead; coronary sinus ostial atresia; left persistent superior vena cava.
© 2021 The Authors.