Pacemakers are devices used to treat dangerously slow heartbeats. A pacemaker detects every heartbeat a patient has, and does not allow the heartbeat to drop below a preset rate. The pacemaker can be programmed or set in a variety of ways to best fit the needs of each individual patient. Once a pacemaker is inserted, most patients are not aware of when the pacemaker is pacing their heart, but they usually do notice an improvement in their symptoms. It usually requires a hospital stay of 1-2 days. The hospital and your provider’s nurse will inform you of specific instructions for this procedure.