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Artificial cardiac pacemaker - Wikipedia
Pacemaker - Mayo Clinic
Pacemaker: Types, Procedure, Precautions, and More - Healthline
Pacemaker | American Heart Association
How Does a Pacemaker Work? - Verywell Health
Pacemaker (for the Heart): Surgery, Types & What It Is - Cleveland …
Living With Your Pacemaker | American Heart Association
Heart Disease and Pacemakers - WebMD
Pacemaker recovery surgery: Timeline and complications
Pacemaker implantation - NHS