Fabry disease: a mimic for obstructive hypertrophic cardiomyopathy?

Exogenous administration of the deficient enzyme has been shown to clear microvascular endothelial deposits, which are integral to disease manifestation, in the kidney, skin, and heart. Interestingly, isolated cardiac Fabry disease may exist without other overt manifestations. In one study, 3% of male subjects with myocardial hypertrophy were found to harbour this enzyme deficiency, 3 whereas another study showed that approximately 4% of patients referred to a tertiary centre for evaluation of HCM actually had evidence of Fabry disease. 4 If this storage disease were misdiagnosed as HCM, patients who could be treated effectively with medication might be subjected to aggressive procedures such as septal ablation or surgical septal myectomy. We sought to determine the frequency of Fabry disease among patients who underwent surgical myectomy for the relief of symptomatic obstructive HCM.