SummaryAdiponectin, which is an adipose-derived protein with antiatherosclerogenic activities, has been reported to be elevated in patients with heart failure. However, there are no reports on the significance of adiponectin in patients with hypertrophic cardiomyopathy (HCM). The purpose of this study was to elucidate the clinical significance of plasma adiponectin levels in HCM patients.Clinical characteristics, echocardiographic parameters, and levels of plasma B-type natriuretic peptide (BNP) and adiponectin were evaluated in 106 HCM patients. The plasma adiponectin levels were 10.8 ± 6.3 (range, 2.7-37.3) μg/mL. Plasma adiponectin levels were positively related to age and inversely related to body mass index (BMI). Among echocardiographic parameters, % fractional shortening (r = -0.20, P = 0.03) and maximum LV wall thickness (r = -0.23, P = 0.02) were inversely related to plasma adiponectin levels. A significant correlation between plasma adiponectin levels and BNP levels was also observed (r = 0.27, P = 0.005). In multivariate analysis, BMI, % fractional shortening, and plasma BNP levels were independent predictors of plasma adiponectin levels.Plasma adiponectin levels are associated with impaired LV systolic function in HCM patients, but not with the LV outflow gradient. Together with BNP, adiponectin can be a useful biomarker for assessing disease severity in HCM patients. (Int Heart J 2010; 51: 51-55) Key words: Hypertrophic cardiomyopathy, Adiponectin, B-type natriuretic peptide, LV remodeling, Heart failure H ypertrophic cardiomyopathy (HCM), a relatively prevalent genetic cardiac disease caused by mutations in genes encoding sarcomere proteins, is clinically defined as left ventricular (LV) hypertrophy with heterogeneous clinical and morphological features in the absence of other cardiovascular diseases.1,2) The clinical and morphological features are diverse and the natural history varies from an asymptomatic and benign clinical course to sudden premature death. [3][4][5] Biomarkers are molecules that are objectively measured by laboratory techniques, which can give us useful information in patients with cardiovascular disease, including HCM. 6) Adipocytokine adiponectin is an adipose-derived protein and shows antiatherosclerogenic and insulin-sensitizing effects. The low plasma levels of adiponectin are associated with type 2 diabetes and ischemic heart disease. [7][8][9][10][11] Moreover, the novel cardiovascular effects of adiponectin have attracted considerable attention in patients with LV hypertrophy and chronic heart failure.12-16) However, the significance of adiponectin has not yet been evaluated in patients with HCM. The purpose of this study was to elucidate the significance of plasma adiponectin levels in HCM.
MethodsPatients and study protocol: The study group included 106 patients with HCM diagnosed based on echocardiographic demonstration of a hypertrophied left ventricle (maximum wall thickness ≥ 15 mm) in the absence of systemic hypertension or other cardiac disease that could produc...