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Myotonic dystrophy presenting as atrial flutter in childhood
Kenji Suda1, Masahiko Matsumura, Yuji Hayashi
1Division of Pediatric Cardiology, Department of Pediatrics, Tenri Hospital, Tenri City, Japan. kensuda@tenriyorozu-hp.or.jp
Cardiology in the Young
|July 9, 2004
Summary
Atrial flutter can be an early indicator of cardiac issues in children with myotonic dystrophy. Prompt diagnosis and treatment, like electroversion, can restore normal heart function.
Area of Science:
- Pediatric Cardiology
- Neuromuscular Disorders
Background:
- Myotonic dystrophy is a progressive genetic disorder affecting muscles.
- Cardiac complications are common in myotonic dystrophy, but often manifest later in life.
Observation:
- A 12-year-old boy presented with tachycardia and cardiomegaly.
- Electrocardiogram revealed atrial flutter with a rapid ventricular rate.
- Echocardiogram showed left ventricular dilation and reduced contractility.
Findings:
- Electromyography confirmed myotonic dystrophy.
- Electroversion successfully converted atrial flutter to sinus rhythm.
- Cardiac function normalized after rhythm conversion.
Implications:
- Atrial flutter may serve as an early sign of cardiac involvement in childhood myotonic dystrophy.
- This case highlights the importance of cardiac monitoring in pediatric patients with myotonic dystrophy.
- Timely intervention for arrhythmias can improve cardiac outcomes in affected children.