Fig. 4.

Chest radiographs from patients with congenital heart disease demonstrating a variety of non-MR-conditional CIED systems. (A) A dual chamber epicardial system placed in infancy. (B) A right-sided transvenous system placed in a patient with dextrocardia and a retained epicardial system. (C) A complex hybrid system after many years of CIED management, including bilateral transvenous systems, abandoned leads, an epicardial system tunneled to a subclavian pocket and an epicardial coil. Patients shown in (B) and (C) have an intravascular stent, unrelated to the pacing system.