A recently implanted left ventricular lead was fixated in the coronary sinus due to thrombosis while attempting to reposition the lead because of phrenic nerve stimulation.

Coronary venous thrombosis, Lead fixation
dx.doi.org/10.1111/j.1540-8159.2008.01215.x, hdl.handle.net/1765/29389
Pacing and Clinical Electrophysiology
Erasmus MC: University Medical Center Rotterdam

Breuls, N, & Res, J. (2008). LV lead fixation in a coronary vein may be the cause and result of thrombosis. Pacing and Clinical Electrophysiology, 31(11), 1506–1507. doi:10.1111/j.1540-8159.2008.01215.x