A pacemaker is a small, implantable electronic device that helps regulate the heartbeat. Pacemakers are commonly used for people who have a heart rate that is too slow or who have disorders that interfere with the heart’s normal electrical pathways. A pacemaker prevents slow heart rates that may cause shortness of breath, fatigue, lightheadedness, or even sudden death. ➡️ Learn more about the role of electronic pacemaker devices in maintaining heart rhythm for patients with certain conditions in this JAMA Patient Page: ja.ma/4dUpg5n