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Cardiac repolarization abnormalities in multiple sclerosis: spinal cord MRI correlates.
J de Seze1, T Stojkovic, J Y Gauvrit
1Department of Neurology, Hôpital R. Salengro, CHRU de Lille, France. j-deseze@chru-lille.fr
Muscle & Nerve
|August 3, 2000
Summary
Multiple sclerosis (MS) patients exhibit ventricular repolarization dysfunction, indicated by prolonged corrected QT (QTc) intervals. This dysfunction correlates with spinal cord atrophy, suggesting axonal loss rather than demyelination in MS.
Area of Science:
- Cardiology
- Neurology
- Neuroimaging
Background:
- Ventricular repolarization dysfunction is increasingly recognized in multiple sclerosis (MS).
- Understanding cardiac involvement in MS is crucial for comprehensive patient care.
Purpose of the Study:
- To investigate ventricular repolarization dysfunction in MS patients.
- To explore the relationship between corrected QT (QTc) interval abnormalities and spinal cord magnetic resonance imaging (MRI) findings in MS.
Main Methods:
- Evaluated 52 MS patients and compared their QTc intervals with healthy controls.
- Assessed spinal cord MRI to identify atrophy and demyelination.
- Correlated QTc interval measurements with spinal cord imaging data.
Main Results:
- MS patients showed significantly increased QTc intervals compared to controls (P < 0.01).
- Elevated QTc intervals were correlated with reduced spinal cord area (P < 0.01).
- QTc abnormalities in MS were associated with spinal cord atrophy, indicative of axonal loss.
Conclusions:
- Ventricular repolarization abnormalities are present in MS.
- QTc interval prolongation in MS is linked to axonal damage, not demyelination.
- Spinal cord atrophy is a key correlate of cardiac dysfunction in MS.