How is a pacemaker fitted? 

A pacemaker is a small, battery powered device that is implanted under the skin to regulate a slow or irregular heartbeat. In the UK, fitting a pacemaker is a common and highly successful procedure typically performed as a day case under local anaesthesia. The process involves precise surgical steps to create a pocket for the device and carefully thread electrical leads through the veins into the heart chambers. 

In this article, you will learn about the surgical techniques used during the procedure, how the leads are tested for accuracy, and what to expect during the recovery phase in an NHS hospital. We will also discuss the role of the cardiac physiologist in programming your new device. 

What We’ll Discuss in This Article 

• Preparing for the procedure and the use of local anaesthesia 

• Creating the surgical pocket under the collarbone 

• The technique of venous access and lead positioning 

• Electrical testing and sensing checks during the procedure 

• Connecting the pulse generator and closing the incision 

• Post operative care and immediate recovery guidelines 

• Internal Link Suggestions for living with a pacemaker 

Preparation and local anaesthesia 

Before the procedure begins, you will be taken to a cardiac catheterisation lab or a specialised operating theatre. You will usually be given a dose of antibiotics through a drip to prevent infection. The area just below your collarbone, usually on the non dominant side, will be cleaned with antiseptic solution and numbed with a local anaesthetic injection. 

While you will be awake during the fitting, most patients in the UK are also offered a light sedative to help them feel relaxed. You should not feel any sharp pain, though you may feel some pressure or pulling sensations as the cardiologist works on the surgical pocket. 

• Local Anaesthetic: Numbing medication injected into the skin and deeper tissue. 

• Prophylactic Antibiotics: Medicine given before surgery to lower infection risk. 

• Sterile Field: The surgically cleaned area where the device is implanted. 

• Sedation: Optional medication to reduce anxiety during the procedure. 

Creating the pocket and lead placement 

Once the area is numb, the cardiologist makes a small incision, about 5cm to 10cm long, just below the collarbone. They then create a pocket between the skin and the chest muscle, or sometimes deeper under the muscle, where the pulse generator will eventually sit. 

The next step is to find a large vein, such as the cephalic or subclavian vein, that leads directly to the heart. Using X ray guidance, also known as fluoroscopy, the cardiologist threads one or two thin, flexible leads through this vein and into the heart. For a standard dual chamber pacemaker, one lead is placed in the right atrium and another in the right ventricle. 

• Pulse Generator: The brain of the pacemaker containing the battery and circuitry. 

• Endocardial Leads: The electrical wires that carry signals between the heart and the device. 

• Fluoroscopy: Continuous X ray imaging used to guide the leads into place. 

• Dual Chamber: A pacemaker that monitors and paces both the top and bottom of the heart. 

Testing and device connection 

Once the leads are in position, a cardiac physiologist performs several electrical tests. They check the pacing threshold to see how much energy is needed to make the heart beat and the sensing to ensure the leads can clearly hear the heart’s natural electricity. 

If the measurements are optimal, the leads are secured in place and plugged into the pulse generator. The cardiologist then places the device into the pre prepared pocket and stitches the incision closed. Most UK hospitals use dissolvable stitches or surgical glue, which means you won’t need to return to have them removed. 

• Pacing Threshold: The minimum electrical output required to stimulate a heartbeat. 

• Sensing: The device’s ability to detect the heart’s own electrical signals. 

• Impedance: A measure of the electrical resistance in the leads to check for damage. 

• Subcuticular Stitches: Stitches placed under the skin that dissolve on their own. 

Recovery and post operative care 

After the procedure, you will be taken to a recovery ward where your heart rhythm and blood pressure will be monitored. A chest X ray is usually performed shortly after the fitting to confirm that the leads are still in the correct position and that there are no lung complications. 

Most patients can go home the same day. You will be given specific instructions on how to care for your wound and advised to avoid lifting your arm on the side of the pacemaker above shoulder height for about 4 to 6 weeks. This arm restriction is vital to prevent the leads from being pulled out of place before they have had a chance to scar into the heart tissue. 

Conclusion 

Fitting a pacemaker is a precise clinical procedure that has been refined over decades to ensure maximum patient safety. By using local anaesthesia and real time X ray guidance, UK cardiology teams can accurately restore a healthy heart rhythm with minimal downtime for the patient. Following the post operative care instructions is the final, essential step in ensuring your new device functions perfectly for years to come. 

If you experience severe, sudden, or worsening symptoms, such as a sudden blackout, redness or swelling at the wound site, or a fever, call your cardiac team or 111 immediately. 

Authority Snapshot  

This article was written by Dr. Rebecca Fernandez, a UK trained physician with an MBBS and extensive experience in cardiology and general surgery. Having assisted in numerous pacemaker implant procedures and managed post operative cardiac wards in the NHS, Dr. Fernandez provides expert insight into the clinical steps and safety protocols of heart device therapy. This content is aligned with UK national guidelines to provide accurate and balanced information.