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Ventricular pacemaker upgrade: experience, complications and recommendations
D J Hildick-Smith1, M D Lowe, S A Newell
1Department of Cardiology, Papworth Hospital, Cambridge, UK.
Heart (British Cardiac Society)
|June 9, 1998
Summary
Pacemaker upgrades from single chamber to dual chamber systems take longer and have more complications than initial implantations. This procedure should only be performed by experienced operators for clear indications.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
- Medical Device Technology
Background:
- Single chamber ventricular pacemakers (VVI) are often implanted initially.
- Advancements in pacing technology allow for upgrades to dual chamber systems (DDD).
- Understanding the outcomes of these upgrades is crucial for patient management.
Purpose of the Study:
- To evaluate the outcomes of upgrading pacemakers from single chamber ventricular (VVI) to dual chamber (DDD) systems.
- To compare the procedure duration and complication rates of upgrades versus initial pacemaker implantations.
Main Methods:
- Retrospective analysis of 44 patients undergoing pacemaker upgrade.
- Data collected on procedure duration, indications, and complications.
- Comparison with historical data of VVI and DDD implantation durations.
Main Results:
- The primary indications for upgrade were pacemaker syndrome, heart failure, and opportunistic replacement.
- Upgrade procedure duration (82.9 min) was significantly longer than VVI (42.9 min) or DDD (56.6 min) implantation.
- A high complication rate of 45% was observed, including pneumothorax, arrhythmias, and lead issues.
Conclusions:
- Pacemaker upgrade procedures are associated with increased duration and complication rates compared to initial implantations.
- The study recommends that upgrades be performed by experienced operators and only when a clear clinical indication exists.
- Avoid implanting VVI systems with the expectation of a low-risk future upgrade if atrial activity is present.