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Myotonic dystrophy and cardiac disorders.
V Rakocević-Stojanović1, M Grujić, P Seferović
1Institute of Neurology, Dr. Subotića 6, 11000 Belgrade, Yugoslavia.
Panminerva Medica
|April 11, 2001
Summary
Myotonic dystrophy (MD) frequently causes cardiac issues. Electrophysiologic studies are most effective for early detection of heart problems in MD patients, revealing abnormalities in 87%.
Area of Science:
- Cardiology
- Genetics
- Neurology
Background:
- Myotonic dystrophy (MD) is a multisystem disorder with frequent cardiac complications.
- Fatal cardiac rhythm disturbances cause sudden death in 30% of MD patients.
Purpose of the Study:
- To assess methods for early detection of myocardial and conduction system disturbances in MD.
- To evaluate the sensitivity of various cardiological diagnostic tools.
Main Methods:
- 45 MD patients underwent ECG, 24-hr Holter monitoring, echocardiography, and electrophysiologic studies.
- Late ventricular potentials were analyzed in 36 patients.
- Genetic testing confirmed CTG triplet expansion in all participants.
Main Results:
- Cardiological abnormalities were found in 89% of patients.
- Intraventricular conduction disturbances (prolonged HV interval) were most common (72%).
- Electrophysiologic study showed the highest sensitivity (87%), followed by Holter monitoring (64%), ECG (58%), late ventricular potentials (55%), and echocardiography (46%).
Conclusions:
- MD is associated with a high prevalence of cardiac involvement.
- Electrophysiologic studies are highly sensitive for detecting cardiac abnormalities in MD.
- Early detection of cardiac issues is crucial for managing MD patients.