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Your pacemaker / icd generator change checklist
Keep this guide with your medication plan and discharge instructions.
Before you arrive
- Read the medication and fasting plans. Your team must complete any intentional blanks before you follow them.
- Complete scheduled tests. Bring your current medicine list and allergy information.
- Arrange an adult driver and someone to stay with you after sedation.
Procedure date / arrival time:
Facility / check-in location:
Before you leave
Keep the current medication list, recovery instructions and follow-up details together. Have conflicting instructions resolved before discharge. Use the emergency warning signs in this guide.
Follow-up appointment or timeframe / booking instructions:
Practice phone: ____________________
After-hours number / route: ____________________
UNDERSTANDING YOUR PROCEDURE
Pacemaker / ICD generator change
Before and after replacement of the battery unit with existing leads retained
What the procedure does
The generator is the sealed battery-and-electronics unit of a pacemaker or implantable defibrillator (ICD). When it needs replacement, the old unit is disconnected and a new unit is connected to the existing working leads. This guide covers a generator-only change. It does not cover a leadless device, extraction, new leads, an upgrade or treatment of an infected system; those need a different plan.
On the day
The skin is numbed with local anesthetic and sedation is usually offered. Through an incision near the device, the team replaces the generator, tests the system and closes the wound. Antibiotics are given around the procedure. Most uncomplicated changes are day procedures, but observation may be longer when needed. Any change in the planned lead work must be reflected in your discharge instructions.
Benefits and risks
Replacement maintains the intended pacing or defibrillator treatment. Risks include wound bleeding or a blood collection, infection, pain, damage to an existing lead, device malfunction and need for additional surgery. Serious complications and death are uncommon but possible. Your team reviews whether the replacement device still fits your current treatment goals.
Getting ready
Medicines and fasting
Blood thinner and antiplatelet decisions balance pocket bleeding against clot or stent risk. Use the completed plan below; do not stop these medicines or add heparin bridging on your own. Restart timing must be documented before discharge.
Blood thinner / antiplatelet plan
Food and drink plan
SGLT2 medicines
GLP-1 medicines
Any separate written instructions for insulin or other diabetes medicines take priority; do not apply a general morning-medicine instruction to them.
Recovering at home
What to expect
The new unit may feel slightly different under the skin. Mild improving soreness or bruising can occur. Rapidly increasing swelling, warmth, redness, drainage or opening needs prompt assessment.
Follow-up
Appointment / return-to-work details:
Driving clearance date / review plan:
If your replacement device is an ICD
The ICD shock plan still applies. After one shock while otherwise feeling well, sit somewhere safe and contact the device clinic promptly the same day; use the after-hours route if needed. Call 911 for more than one shock in a short period, or any shock with chest pain, breathlessness, fainting or feeling very unwell. Do not drive after a shock until the team reassesses you. A pacemaker does not deliver these shocks.
When to get help
Call 911
- Severe or sudden chest pain or trouble breathing, fainting, or stroke symptoms such as facial droop, arm weakness or trouble speaking.
- Heavy or continuing bleeding despite firm pressure, or rapidly growing painful swelling with weakness or faintness. Lie down, keep firm pressure on the bleeding site and have someone call 911.
- Repeated ICD shocks, or a shock with chest pain, breathlessness, fainting or feeling very unwell.
Do not drive yourself. Do not wait for a message or remote-monitor response.
Contact the clinic the same day
Increasing redness, warmth, pain or swelling; drainage; wound opening; visible device material; fever or chills.
For warning symptoms after hours, use the contact route below. If you cannot reach the team and symptoms are worsening, seek urgent assessment. Use 911 for the severe symptoms listed above.
Practice phone: ____________________
After-hours number / route: ____________________
Follow your personalized medication and recovery plan. This guide supports, but does not replace, the consent discussion or your treating team’s instructions.