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[Mitral valve prolapse: do rhythm disorders have an electrophysiologic substratum?]
Archives Des Maladies Du Coeur Et Des Vaisseaux
|June 1, 1982
Summary
Patients with mitral valve prolapse (MVP) show prolonged PR intervals and a higher incidence of pre-excitation syndromes, suggesting specific electrophysiological abnormalities. Ventricular arrhythmias in MVP may stem from endomyocardial issues, limiting pacing
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Surgery
Context:
- Mitral valve prolapse (MVP) is a common valvular heart disease.
- The underlying electrophysiological mechanisms of arrhythmias in MVP patients remain incompletely understood.
- Electrophysiological investigation is crucial for diagnosing and managing cardiac arrhythmias.
Purpose:
- To investigate electrophysiological characteristics in patients with mitral valve prolapse (MVP).
- To identify common electrophysiological features associated with arrhythmias in MVP.
- To assess the utility of electrophysiological studies in understanding MVP-related arrhythmias.
Summary:
- Electrophysiological studies in 18 MVP patients revealed a significantly prolonged PR interval, primarily due to impaired atrioventricular nodal conduction (decreased AH interval).
- The Wenckebach point was significantly lower in the MVP group compared to controls.
- A notable prevalence of pre-excitation syndromes (4/18), including Wolff-Parkinson-White patterns, was observed in MVP patients, particularly those with supraventricular arrhythmias.
Impact:
- Findings suggest specific electrophysiological alterations in MVP, contributing to supraventricular arrhythmias.
- The study highlights the importance of identifying pre-excitation syndromes in MVP patients.
- Electrophysiological evaluation may have limited value for elucidating ventricular arrhythmias in MVP, potentially due to their endomyocardial origin.