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Left lateral radiograph of a dog after implantation of an artificial pacemaker. The generator lies subcutaneously on the right chest wall (lateral to the spine on the radiograph). The lead courses from the generator subcutaneously to the neck (jugular vein) and from there to the cranial vena cava, right atrium, and right ventricle. The tip is in the apex of the right ventricle.
Courtesy of Dr. Mark D. Kittleson.