Superior vena caval anomaly preventing pervenous pacemaker implantation.
D000368:Aged; D006328:Cardiac Catheterization; D004566:Electrodes; D006327:Heart Block / Q000628:therapy; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial; D014683:Vena Cava, Superior / Q000002:abnormalities*