title: Pacemaker failure due to radiation therapy.
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000532:radiotherapy; D003201:Computers; D004562:Electrocardiography; D004868:Equipment Failure; D005260:Female; D006801:Humans; D008838:Microcomputers; D010138:Pacemaker, Artificial; D011878:Radiotherapy / Q000009:adverse effects*; D011879:Radiotherapy Dosage