Retrograde coronary sinus perfusion to maintain viability during cardiac surgery means that a connection via the capillary system to the coronary arteries, and potentially bypass grafts, may be possible. Coronary sinus (CS) venography prior to resynchronisation therapy in this patient with previous bypass grafting was associated with visualisation of these grafts.

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Thornton, A.S., Scholten, M.F., & Jordaens, L.J.L.M.. (2006). Imaging of a coronary artery bypass graft during coronary sinus venography. Cardiovascular Journal of Southern Africa. Retrieved from