Introduction
After heart surgery or a serious heart event, patients are looked after in an intensive care unit (ICU) or cardiac ICU, where the heart, blood pressure, breathing and other organs are watched continuously by specialised nurses and doctors.
Temporary pacing is part of this care. If the heartbeat is too slow after surgery, thin wires placed on the heart during the operation can be connected to an external pacemaker that steadies the rhythm until the heart recovers.
Why the procedure is needed
Close monitoring and temporary pacing help to detect and treat problems quickly, such as:
- A slow heartbeat or heart block after surgery
- Irregular heart rhythms, including atrial fibrillation
- Low blood pressure or low heart output
- Bleeding from the chest drains, or fluid around the heart
- Problems with breathing, kidneys or other organs after a major operation
Who may benefit
- Patients after open-heart surgery such as bypass, valve surgery or congenital heart surgery
- Patients after a serious heart attack or rhythm problem
- Patients with a slow heartbeat or heart block that needs temporary support
- Patients awaiting a permanent pacemaker who need a bridge
What monitoring and pacing involve
- Continuous heart monitor
- Electrodes on the chest show the heart rhythm at every moment, and alarms warn the team of changes.
- Blood pressure lines
- A small tube in an artery gives a beat-by-beat blood pressure, and another line measures pressures in the veins.
- Chest drains and fluid balance
- Drains show bleeding, and fluids, urine output and blood tests are watched.
- Temporary pacing wires
- Fine wires attached to the heart muscle exit through the skin and connect to an external pacemaker, set to the rate the heart needs.
- Weaning and removal
- When the heart's own rhythm is steady, the pacemaker is turned down and the wires are gently removed before discharge.
Procedure overview
Step 1: Admission to ICU
After surgery you are taken to the ICU, connected to monitors, and you may still have a breathing tube for a short time.
Step 2: Continuous observation
Nurses and doctors check rhythm, blood pressure, oxygen levels, drains, urine output and pain throughout the day and night.
Step 3: Treating problems early
Medicines, fluids, oxygen or other treatment are given quickly if any reading changes.
Step 4: Temporary pacing when needed
If the heartbeat is too slow, the wires are connected to an external pacemaker, which paces the heart at a set rate.
Step 5: Weaning
As you recover, support, lines and drains are removed step by step and you move to the ward.
Step 6: Pacing wire removal and next steps
Wires are removed when no longer needed. If the heartbeat remains slow, a permanent pacemaker may be considered.
Clinical advantages
- Problems can be noticed and treated early, often before symptoms develop
- Temporary pacing keeps the heart rate safe while the heart recovers
- Allows safe recovery after major heart surgery
- Gives the team time to decide if a permanent pacemaker is needed
Risks and considerations
Every operation carries risk. The points below are general; your own risk depends on your health and on the operation you need.
- Infection or discomfort from lines, tubes and wires
- Bleeding when drains or pacing wires are removed (uncommon)
- Pacing wires may stop working properly and need adjusting
- Delirium or sleep disturbance in ICU, particularly in older patients
- Pacing is temporary support; some patients still need a permanent pacemaker later
Frequently asked questions
Why do I need to stay in intensive care?
After major heart surgery, the first hours and days are when problems are most likely, and ICU gives close, continuous monitoring.
Are the pacing wires painful?
They are placed during the operation. Most patients do not feel them, and removal is quick.
How long will I need pacing?
Often a few days, but it varies. Some patients do not need it at all.
Will I need a permanent pacemaker?
A small number of patients do if the slow rhythm does not recover. Your team will assess this over the following days.
Can my family visit?
Usually yes, within the unit's visiting rules. Ask the ICU team about timings.
Patient-friendly summary
After heart surgery, ICU monitoring watches the heart and body day and night, and temporary pacing wires can steady a slow heartbeat while the heart recovers. This care helps problems to be caught and treated early, but it is supportive and temporary. Your ICU team will explain what is needed and when you can move to the ward.