Myoglobinuric Syndromes Including Malignant Hyperthermia

Sep 2, 2016 by in NEUROLOGY Comments Off on Myoglobinuric Syndromes Including Malignant Hyperthermia

Myoglobinuria—the presence in urine of a 17.8-kDa, red pigment, iron-protein compound called myoglobin—results from rhabdomyolysis, which is the acute breakdown or necrosis of skeletal muscle fibers whose contents (among them…

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Metabolic and Mitochondrial Myopathies

Sep 2, 2016 by in NEUROLOGY Comments Off on Metabolic and Mitochondrial Myopathies

McArdle disease, an autosomal recessive myophosphorylase deficiency leading to glycolytic defects, is the common glycogen storage disease (GSD). Other glycolytic defects—phosphofructokinase, phosphoglycerate mutase, and lactic dehydrogenase deficiencies—produce similar clinical pictures….

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Endocrine, Toxic, and Critical Illness Myopathies

Sep 2, 2016 by in NEUROLOGY Comments Off on Endocrine, Toxic, and Critical Illness Myopathies

Hypothyroid Myopathy. Most patients with myxedema (chronic hypothyroidism) complain of weakness; 25% have objective proximal muscle weakness. Myoedema, an electrically silent mounding of percussed muscle, occurs in one third of…

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