An echocardiographic binary appearance of the left ventricular endocardial border was present in 83% of Fabry's disease patients and 0% of controls, yielding 94% sensitivity and 100% specificity.
Case-Control (n=160)
Does the echocardiographic binary appearance of the left ventricular endocardial border accurately identify Fabry's disease cardiomyopathy compared to other forms of left ventricular hypertrophy?
A binary appearance of the left ventricular endocardial border on echocardiography is a highly sensitive and specific noninvasive diagnostic hallmark for Fabry's disease cardiomyopathy.
Absolute Event Rate: 83% vs 0%
OBJECTIVES: We sought to identify echocardiographic hallmarks of Fabry's disease cardiomyopathy (FC). BACKGROUND: The recognition of FC from other forms of left ventricular hypertrophy (LVH) by noninvasive imaging techniques is not yet available, and diagnosis, mostly in the absence of systemic manifestations, still relies on genetic and invasive studies. METHODS: Forty consecutive patients (mean age 39 +/- 15 years, 22 men and 18 women) with an established diagnosis of Fabry's disease were submitted to echocardiographic evaluation. Control population consisted of 40 consecutive patients with hypertrophic cardiomyopathy (HCM), 40 hypertensive patients with echocardiographic evidence of LVH, and 40 age- and gender-matched healthy subjects with no LVH. All HCM patients and FC with LVH and/or cardiac symptoms underwent cardiac catheterization with left ventricular endomyocardial biopsy. RESULTS: Echocardiography showed in 83% of FC patients (95% of FC patients with LVH) a binary appearance of endocardial border absent in all HCM, hypertensive, and healthy subjects. The sensitivity and specificity of this echocardiographic feature in detecting Fabry patients in study population were 94% and 100%, respectively. Comparison of echocardiographic with histologic and ultrastructural findings showed the binary appearance to reflect an endomyocardial glycosphingolipids compartmentalization, consisting of thickened glycolipid-rich endocardium, free glycosphingolipid subendocardial storage, and an inner severely affected myocardial layer with a clear subendocardial-midwall layer gradient of disease severity. CONCLUSIONS: Echocardiographic binary appearance of left ventricular endocardial border, reflecting endomyocardial glycosphingolipids compartmentalization, represents a sensitive and specific diagnostic hallmark of Fabry's disease cardiomyopathy.
Pieroni et al. (2006) conducted a case-control in Fabry's disease cardiomyopathy (n=160). Echocardiography vs. Hypertrophic cardiomyopathy, hypertensive LVH, and healthy subjects was evaluated on Binary appearance of endocardial border. An echocardiographic binary appearance of the left ventricular endocardial border was present in 83% of Fabry's disease patients and 0% of controls, yielding 94% sensitivity and 100% specificity.