Permanent Pacemaker Implantation :
A pacemaker is implanted to treat bradycardia (an abnormally slow heart rate). Pacemakers can also adjust the heart rate to meet the body's needs, whether during exercise or rest. Implantation of a pacemaker involves positioning leads (thin, insulated wires) in the heart and placing the device in a pocket of skin, usually in the shoulder area. Typically the implant procedure involves only local anesthetics and a sedative, rather than general anesthesia. Most people have a fairly quick recovery after a pacemaker implant.
What Is a Pacemaker?
A pacemaker is a small implantable device that treats abnormal heart rhythms called arrhythmias. Specifically, a pacemaker treats slow arrhythmias called bradycardia.
Arrhythmias result from a problem in the heart's electrical system. Electrical signals follow a certain pathway through the heart. It is the movement of these signals that causes your heart to contract.
A pacemaker system has two parts, and each plays a role in treatment. The pacemaker leads are thin, insulated wires that carry electrical signals back and forth between the device and the heart. The leads can sense when the heart is beating too slowly and needs treatment.
The pacemaker device, or pulse generator, is quite small, easily fitting in the palm of your hand. It contains computerized parts that run on a battery. The device treats your heart by sending very small amounts of electrical energy to the heart through the leads. Patients usually can't feel the treatment. The pacing system delivers treatment based on what it senses in your heart, even if you don't feel any symptoms.
How Should I Prepare for the Implant?
Your doctor or nurse will give you specific instructions. Common guidelines include:
- Whether to continue or stop certain medications
- What to avoid eating or drinking before surgery
- What your hospital's check-in procedures are
- Where Is the Device Implanted?
The pacemaker can be implanted below the collarbone on either the right or left side of the body. In some cases the device is implanted in the abdomen. Before confirming where to place the device, you and your doctor will talk about:
- Your age and overall health
- Whether you have had chest surgery
- Your activities and lifestyle
- How Is a Pacemaker Implanted ?
Implanting the Leads: You lie on an exam table and an intravenous (IV) line is put into your arm. The IV delivers fluids and medications during the procedure. The medication makes you relaxed and groggy, but not unconscious. (General anesthesia is usually not needed.) During the procedure, you will be attached to several monitors.
Your doctor numbs a small area of skin and inserts the leads through a small incision, usually near the collarbone. The doctor gently steers the leads through the blood vessels and into the heart. The doctor can see where the leads are going by watching a video screen with real-time, moving x-rays (fluoroscopy).
Depending on the treatment your heart needs, either one or two leads are implanted in your heart. A pacemaker that uses one lead is called a single-chamber pacemaker. A pacemaker that uses two leads is called a dual-chamber pacemaker. With a dual-chamber pacing system, one lead goes in your top right chamber (the atrium) and the other lead goes in your bottom right chamber (the ventricle).
Testing the Leads and Device: Your doctor connects the implanted leads to the device and tests the system. In this way the doctor makes sure that both parts of the pacemaker system—the leads and the device—work properly. During the testing you may feel your heart beating faster.
Implanting the Device: Your doctor places the device just under the skin—usually near your collarbone—and then stitches the incision closed.