title: Transvenous pacing in presence of anomalous venous return to heart.
mesh_terms: D006328:Cardiac Catheterization; D004566:Electrodes; D006327:Heart Block / Q000150:complications / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D014682:Vena Cava, Inferior / Q000002:abnormalities*; D014683:Vena Cava, Superior / Q000002:abnormalities*