Final answer:
According to the American Heart Association guidelines, clients with a pacemaker that was placed 3 years ago do not require antibiotic premedication prior to invasive dental procedures.
Step-by-step explanation:
According to the American Heart Association guidelines, clients with a pacemaker that was placed 3 years ago do not require antibiotic premedication prior to invasive dental procedures. In the past, antibiotic prophylaxis was recommended to prevent infective endocarditis, but the guidelines were updated in 2007 due to a lack of evidence supporting its efficacy. It is important for patients to regularly follow up with their cardiologist to ensure the pacemaker is functioning properly.