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Volume: 38
Number: 4
Index: December 2010
Clinical Focus:Respiratory Care
Editorial Calendar
December 2010
Clinical Focus: Respiratory Medicine
  • Asthma and the athlete
    • Vocal cord dysfunction
    • Exercise-induced asthma
    • Exercise-induced bronchospasm
  • COPD
    • Obesity and COPD
    • Relationship between COPD and nutrition intake
  • Treatment options for steroid-induced osteoporosis in men
  • Treatments for asthma
    • Bronchodilators, anticholinergics
    • Corticosteroids
    • Metered-dose vs other types of inhalers
  • Respiratory infections in winter sports athletes
  • Asthma in elite athletes
  • Pulmonary rehabilitation and physical activity
  • Fitness and long-term oxygen therapy/lung transplantation
  • Airflow function and the metabolic syndrome
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doi: 10.3810/psm.2021.07.449
The Physician and Sportsmedicine: Volume 32: No.7
Myotonia Congenita in a Young Active Man
Symptoms and Physique Tip the Diagnosis
Kelvin T. L. Chew, MB, BCh, MSpMed; Yue-Shuen Wong, MBBS; Hock-Luen Teoh, MB, ChB; Erle C. H. Lim, MBBS, MMed (Intern Med)
Abstract: A 19-year-old man had a 7-year history of leg cramps and a tendency for his legs to "seize up" when he participated in sports. The condition was initially mild, and clinical examination revealed an extremely muscular physique and percussion and action myotonia. Electromyography was consistent with myotonic discharges, and myotonia congenita was the diagnosis. Carbamazepine therapy relieved all symptoms, except for a short time when the patient stopped taking medication. Physicians should carefully document family history and symptom triggers to facilitate making the correct diagnosis.


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