A pacemaker is a small device placed under the skin of the chest. Its job is to send gentle electrical signals to the heart whenever the heart slows down or beats irregularly, helping it keep a steady rhythm. The device does not run all the time. It only steps in when the heart cannot beat fast enough on its own. So a pacemaker is not a replacement for the heart but a quiet helper that supports it when needed.
The device usually sits just below the collarbone. Thin wires from the device travel through a vein and reach the inside of the heart, where they touch the heart muscle. These wires both monitor the heart’s own beats and deliver signals when necessary.
Why is a pacemaker needed?
A healthy heart beats in a steady pattern. This pattern is set by the heart’s own natural electrical system. With age, illness, or sometimes from birth, this system can weaken. As a result, the heart may start beating too slowly, pausing now and then, or working out of step.
When the heart beats too slowly, it struggles to pump enough blood to the body. If the brain does not get enough blood, dizziness, weakness, blurred vision, or even fainting can follow. This is where a pacemaker helps, making sure the heart keeps a safe pace.
The main reasons for getting a pacemaker include heart block (a problem in the heart’s electrical pathways), sick sinus syndrome (a condition where the heart’s natural pacemaker cells become tired), some lasting rhythm problems, and certain types of heart failure. The decision is always made for each person individually. Two people with the same diagnosis may not always need the same treatment.
How is a pacemaker placed?
The procedure is done in an operating room but it is not considered major surgery. The patient stays awake. Only the area under the collarbone is numbed, so no pain is felt during the procedure. A mild sedative can also be given for comfort.
A small cut is made in the skin and a pocket is created where the device will sit. The wires are guided through a vein near the collarbone and into the heart. Imaging is used to make sure the wires are in the right place. The device is then placed under the skin and the cut is closed with stitches.
The procedure usually takes one to two hours. Most patients go home the same day or the next day. For the first few days, the arm on the side of the device should not be lifted above shoulder height. This keeps the wires from shifting.
Life after getting a pacemaker
In the first weeks, mild tenderness and some swelling at the site are normal. These settle with time. Once the skin heals, the device feels like a small bump under the skin but does not get in the way of daily life.
Most people return to work, social life, and hobbies. Walking, swimming, and cycling can be added back gradually. There is no restriction on intimacy. Driving is also possible for most patients after a short break.
A few things still call for care. Mobile phones are safe to use; just avoid carrying the phone in the chest pocket on the same side as the device, and hold it to the opposite ear during calls. Microwaves, televisions, computers, and household appliances do not cause problems. Airport security gates can be passed through, but the staff should be told about the device, and a hand search is preferred. Some medical scans, especially MRI, are not safe with every device. So before any test, the medical team should be told about the pacemaker. That said, MRI-compatible pacemakers are now widely used.
Battery life and check-ups
The battery inside the device lasts for years. Most modern pacemaker batteries run between eight and twelve years. How long it lasts depends on how often the device has to step in. A device that works most of the time wears down faster than one that helps only now and then.
When the battery runs low, only the battery part of the device is replaced, not the wires. This second procedure is easier than the first because the wires are already in place. Only the pocket is reopened and the device is swapped.
Regular check-ups are needed to make sure the device is working as it should. These visits are done in the clinic with a special reader and are painless. The check tells the doctor how much battery is left, how the wires are doing, and how the heart’s rhythm has been. Some newer devices can also be followed from home using remote monitoring.
When to call the doctor
If the area where the device sits becomes more red, more swollen, starts leaking fluid, or feels warm with fever, the doctor should be called right away. These can be signs of infection at the site.
Dizziness, fainting, sudden weakness, shortness of breath, or a steady twitching feeling in the chest also matter. These may point to a problem with how the device is working and need to be checked. If the device feels like it has shifted from its place, that should also be reported.
Frequently Asked Questions
Does it hurt to have a pacemaker placed?
The area is numbed during the procedure, so no pain is felt. Mild soreness can last a few days afterwards and is usually managed with simple pain relief.
Can someone with a pacemaker do sports?
Most sports can be picked up again once the wound heals. Contact sports such as boxing or wrestling, where direct hits to the chest are likely, are not advised. Swimming, walking, and cycling are safe.
Will a cell phone interfere with a pacemaker?
With modern devices, phones cause no real trouble. Still, it is wise not to carry the phone in the pocket on the same side as the device and to use the opposite ear while talking.
Can I have an MRI?
Older devices were not safe for MRI. Most newer ones are MRI-conditional, meaning the scan is allowed under set conditions. Before any scan, the brand and model of the device should be shared, and both the imaging center and the cardiology team should be informed.
Will my heart stop when the battery runs out?
No. The battery does not run out suddenly. It weakens slowly over months, and the change is picked up during routine checks. The replacement is then planned ahead of time. This is why regular check-ups matter.
Can someone with a pacemaker fly?
Yes. Flying does not affect the device. At airport security, telling the staff and asking for a hand search is enough. Carrying a pacemaker ID card makes things smoother.
Is the device always running?
The device is always in place but does not send signals all the time. It only acts when the heart cannot keep up on its own. So it does not interfere with the heart, it only helps when help is needed.