Infections of Cardiovascular Implantable Electronic Devices

A 75-year-old man presents with localized pain, redness, and swelling of 3 weeks' duration at the pocket site in the left upper shoulder, where an implantable cardioverter-defibrillator was placed 6 months earlier. He has no fever or other systemic symptoms. Physical examination reveals redness and induration at the site of the generator pocket on the left shoulder, with no stigmata of infective endocarditis. Results of blood cultures are negative. How should this case be managed?