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Advantage of discrepant upper rate limits in a DDDR pacemaker.
S T Higano1, D L Hayes, G Eisinger
1Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, MN 55905.
Mayo Clinic Proceedings
|August 1, 1989
Summary
Dual-chamber, rate-modulated (DDDR) pacing offers benefits for heart rhythm disorders. Discrepant upper rate limits in DDDR pacing can prevent rapid tracking of supraventricular tachycardias while maintaining rate response.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Devices
Background:
- Dual-chamber, rate-modulated (DDDR) pacing synchronizes heart rhythms and adjusts pacing rate based on physiological demand.
- This mode integrates dual-chamber and single-chamber rate-modulated pacing technologies.
- Programming requires setting both a maximum tracking rate and a maximum sensor rate, typically to equivalent values.
Observation:
- A case study highlights the benefit of programming discrepant upper rate limits in DDDR pacing.
- Lowering the maximum tracking rate prevented rapid pacing during supraventricular tachycardias.
- Maintaining a higher maximum sensor rate allowed for appropriate rate response during physical activity.
Findings:
- Programming discrepant upper rate limits in DDDR pacing is advantageous.
- A lower maximum tracking rate effectively controls heart rate during tachyarrhythmias.
- A higher maximum sensor rate ensures adequate physiological rate adaptation.
Implications:
- This strategy enhances the safety and efficacy of DDDR pacing devices.
- It offers a method to manage patients with both conduction system disease and potential for supraventricular arrhythmias.
- Optimized programming can improve patient outcomes and device performance.