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QT sensing rate responsive pacing during subacute bacterial endocarditis: a case report.
G C Kaye1, W Baig, A F Mackintosh
1Department of Cardiology, Killingbeck Hospital, Leeds, United Kingdom.
Pacing and Clinical Electrophysiology : PACE
|September 1, 1990
Summary
A patient with a pacemaker after aortic valve replacement developed bacterial endocarditis. The pacemaker appropriately adjusted heart rate during fever, demonstrating physiological pacing.
Area of Science:
- Cardiology
- Infectious Diseases
- Medical Device Technology
Background:
- Pacemakers are crucial for managing cardiac conditions post-surgery.
- Rate-responsive pacemakers adjust pacing based on physiological demand.
- Bacterial endocarditis is a serious infection of the heart valves.
Observation:
- A 63-year-old woman presented with late subacute bacterial endocarditis after aortic valve replacement.
- The patient had a QT sensing rate-responsive pacemaker implanted.
- Febrile periods were associated with systemic symptoms.
Findings:
- The pacemaker demonstrated physiological pacing during febrile episodes.
- Heart rate increased during pyrexia (fever).
- Heart rate decreased when the patient became afebrile.
Implications:
- QT sensing rate-responsive pacemakers can function appropriately during infection-related fever.
- This highlights the adaptability of modern pacemakers in complex clinical scenarios.
- Further research may explore pacemaker performance in various infectious disease states.