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Long-term variations in optimal programming of cardiac resynchronization therapy devices.
D O'Donnell1, V Nadurata, A Hamer
1Department of Electrophysiology Unit, Austin Health, Studley Road, Heidelberg, Victoria, 3084, Australia. odonnell.research@hotmail.com
Pacing and Clinical Electrophysiology : PACE
|February 3, 2005
Summary
Optimal programming for cardiac resynchronization therapy (CRT) devices changes over time. Regular reevaluation and reprogramming of CRT stimulation parameters are necessary for effective patient management.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Optimal programming of cardiac resynchronization therapy (CRT) devices is crucial for patient outcomes.
- Current guidelines for long-term CRT device management remain uncertain.
Purpose of the Study:
- To quantify temporal variations in CRT programming parameters.
- To optimize the follow-up protocols for CRT devices.
Main Methods:
- 40 CRT recipients were studied over 9 months post-implant.
- Echocardiographic and electrocardiographic (ECG) recordings were used to determine optimal AV delay and interventricular (V-V) delays.
- Stimulation parameters were assessed at multiple time points.
Main Results:
- Optimal stimulation parameters remained stable in only 3 out of 40 patients.
- 18 patients required adjustments at each follow-up session.
- A trend towards reduced LV predominance in V-V delay and increased AV delay was observed.
Conclusions:
- Optimal CRT stimulation parameters exhibit significant temporal variability.
- Regular reevaluation and reprogramming are essential for effective CRT management.
- Individual changes in optimal parameters cannot be accurately predicted.