title: Radiology of cardiac pacemakers and their complications with three cases of superior vena caval obstruction.
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011859:Radiography; D013927:Thrombosis / Q000000981:diagnostic imaging* / Q000209:etiology; D014683:Vena Cava, Superior / Q000000981:diagnostic imaging*