We used a standardized bicycle ergometry protocol with a stepwise increasing workload (30-100 W) to evaluate various metabolic factors for the diagnosis and metabolic monitoring of mitochondrial encephalomyopathies.
All patients (n = 9) showed pathological venous lactate/pyruvate (L/P) ratios, which normalized in three patients after 6 months of coenzyme Q10 (CoQ) therapy.
Thus, the L/P ratio proved to be the clinically most useful parameter in the evaluation and monitoring of mitochondrial diseases, showing higher sensitivity than lactate measurements only. CoQ may exert a favourable effect in some patients with mitochondrial diseases.
About the Authors
Chan A, Reichmann H, Kögel A, Beck A, Gold R. (1998) Metabolic changes in patients with mitochondrial myopathies and effects of coenzyme Q10 therapy. J Neurol. 1998 Oct;245(10):681-5. Neurologische Universitätsklinik, Würzburg.
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Metabolic changes in patients with mitochondrial myopathies and effects of coenzyme Q10 therapy.
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