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Updated: Aug 23, 2026

Isolation of Atrial Myocytes from Adult Mice
Published on: July 25, 2019
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
Abstract:
A 12-year-old boy presented with tachycardia and cardiomegaly. An electrocardiogram showed atrial flutter with a ventricular rate of 170 beats/min. The echocardiogram showed left ventricular dilation, with decreased contractility. Electromyography confirmed the diagnosis of myotonic dystrophy. The atrial flutter was converted to sinus rhythm by electroversion, leading to restoration of normal cardiac function. Our case illustrates that atrial flutter can be an early sign of the cardiac complications of myotonic dystrophy in childhood.
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