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Case Reports
. 2013 Sep;22(9):769-71.
doi: 10.1016/j.hlc.2012.12.004. Epub 2013 Jan 18.

Unforeseen cardiac involvement in McArdle's disease

Sherif Moustafa  1 , David J Patton, Michael S Connelly
Affiliations
Case Reports

Unforeseen cardiac involvement in McArdle's disease

Sherif Moustafa et al. Heart Lung Circ. 2013 Sep.

Abstract

McArdle's disease (glycogen storage disease type V) is a rare autosomal recessive metabolic myopathy due to myophosphorylase deficiency. It classically manifests by exercise intolerance, leg cramps, muscle pain and occasionally exercise induced myoglobinuria. The onset of exercise intolerance is typically in the second or third decades of life. It has a specific predilection to skeletal muscle involvement, yet cardiac muscle involvement is very rare. This report describes an unusual case of a 33 year-old man with known McArdle's disease who presented with an incidental finding of severe obstructive hypertrophic cardiomyopathy.

Keywords: Cardiac involvement; Echocardiography; Magnetic resonance; McArdle's disease.

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