title: Defect in lung perfusion and ventilation scanning of patients with permanent transvenous implantable pacemaker.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007726:Krypton; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging* / Q000209:etiology; D011868:Radioisotopes; D011877:Radionuclide Imaging; D013668:Technetium Tc 99m Aggregated Albumin; D014692:Ventilation-Perfusion Ratio
chemical_list: D011868:Radioisotopes; D013668:Technetium Tc 99m Aggregated Albumin; D007726:Krypton