A pacemaker is a small electronic device that is implanted under the skin of the chest to help regulate the heartbeat. It is used to treat conditions that cause an abnormal heart rhythm or a slow heart rate, such as bradycardia, heart block, and certain types of arrhythmias.
The pacemaker works by sending electrical impulses to the heart muscle, which stimulates the heart to beat at a regular rate. The device consists of a battery-powered generator, one or more leads (wires) that are threaded through a vein into the heart, and sensors that detect the heart's electrical activity.
The pacemaker can be programmed to deliver electrical impulses at different rates depending on the patient's needs. Some pacemakers are also capable of monitoring and recording the heart's activity, and can transmit this data wirelessly to the patient's doctor for analysis.
Pacemakers are generally safe and reliable, and can greatly improve the quality of life for people with certain heart conditions. However, like any medical device, there are risks associated with implantation and use, and patients should discuss the potential benefits and risks with their doctor.