Pulmonary thromboembolism associated with superior vena cava thrombosis following permanent transvenous endocardial cardiac pacing.

The case of a 70 year old man with superior vena cava syndrome associated with transvenous pacemaker electrode and a 2 yr history of right ventricular failure is reported. Digital subtraction angiography demonstrated a major thrombus in the right pulmonary artery, and pulmonary thromboembolism was confirmed.