Cardiac pacemaker.
D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D006321:Heart / Q000000981:diagnostic imaging; D006327:Heart Block / Q000628:therapy*; D006801:Humans; D007089:Image Enhancement; D010138:Pacemaker, Artificial; D011859:Radiography
D000889:Anti-Arrhythmia Agents