Surface thrombosis and fibrous encapsulation of intravenous pacemaker catheter electrode.

AN INDWELLING catheter placed in the right side of the heart has the potential for causing untoward reactions. One such reaction is erosion of the lining of the superior vena cava and the right atrium. Bland mural thrombosis is a common response. Infection, of which samples were presented in an earlier communication,' is a more serious complication. Other complications include thrombosis on the surface of the catheter and fibrous encapsulation of the catheter electrode placed into the right ventricle for the purpose of pacing. This report illustrates the latter phenomena, and implies that there are inherent dangers in the attempt at removal of a catheter electrode that has been in place for a considerable period of time.