RESUMEN
Associations between bone mineral density and aortic valvular, aortic annular, and mitral annular calcification were investigated in a cross-sectional analysis of a population-based cohort of 1497 older adults. Although there was no association between continuous bone mineral density and outcomes, a significant association between osteoporosis and aortic valvular calcification in men was found. INTRODUCTION: The process of cardiac calcification bears a resemblance to skeletal bone metabolism and its regulation. Experimental studies suggest that bone mineral density (BMD) and valvular calcification may be reciprocally related, but epidemiologic data are sparse. METHODS: We tested the hypothesis that BMD of the total hip and femoral neck measured by dual-energy X-ray absorptiometry (DXA) is inversely associated with prevalence of three echocardiographic measures of cardiac calcification in a cross-sectional analysis of 1497 older adults from the Cardiovascular Health Study. The adjusted association of BMD with aortic valve calcification (AVC), aortic annular calcification (AAC), and mitral annular calcification (MAC) was assessed with relative risk (RR) regression. RESULTS: Mean (SD) age was 76.2 (4.8) years; 58% were women. Cardiac calcification was highly prevalent in women and men: AVC, 59.5 and 71.0%; AAC 45.1 and 46.7%; MAC 42.8 and 39.5%, respectively. After limited and full adjustment for potential confounders, no statistically significant associations were detected between continuous BMD at either site and the three measures of calcification. Assessment of WHO BMD categories revealed a significant association between osteoporosis at the total hip and AVC in men (adjusted RR compared with normal BMD = 1.24 (1.01-1.53)). In graded sensitivity analyses, there were apparent inverse associations between femoral neck BMD and AVC with stenosis in men, and femoral neck BMD and moderate/severe MAC in women, but these were not significant. CONCLUSION: These findings support further investigation of the sex-specific relationships between low BMD and cardiac calcification, and whether processes linking the two could be targeted for therapeutic ends.
Asunto(s)
Densidad Ósea/fisiología , Calcinosis/fisiopatología , Enfermedades de las Válvulas Cardíacas/fisiopatología , Absorciometría de Fotón , Anciano , Anciano de 80 o más Años , Válvula Aórtica/patología , Válvula Aórtica/fisiopatología , Estenosis de la Válvula Aórtica/epidemiología , Estenosis de la Válvula Aórtica/fisiopatología , Calcinosis/epidemiología , Estudios de Cohortes , Estudios Transversales , Femenino , Cuello Femoral/fisiopatología , Enfermedades de las Válvulas Cardíacas/epidemiología , Articulación de la Cadera/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Estenosis de la Válvula Mitral/epidemiología , Estenosis de la Válvula Mitral/fisiopatología , Osteoporosis/epidemiología , Osteoporosis/fisiopatología , Prevalencia , Factores Sexuales , Estados Unidos/epidemiologíaRESUMEN
AIMS: The aim of the study was to find the epidemiology of hip fractures in heart failure. The increasing survival rate for patients with heart failure places them at risk for other diseases of ageing, including osteoporosis. METHODS AND RESULTS: We included 5613 persons from the Cardiovascular Health Study (CHS) with an average of 11.5 year follow-up. We determined incidence rates and hazard ratios (HRs) in persons with heart failure compared with persons without heart failure and mortality hazards following these fractures. Annualized incidence rates for hip fractures were 14 per 1000 person-years in heart failure and 6.8 per 1000 person-years without heart failure. Unadjusted and multivariable adjusted HRs for hip fracture associated with heart failure in men were 1.87 (95% CI 1.2-2.93) and 1.59 (95% CI 0.93-2.72), respectively. Respective HRs for women were 1.75 (95% CI 1.27-2.4) and 1.41 (95% CI 0.98-2.03). Mortality hazard was approximately 2-fold greater in patients with heart failure and hip fracture compared with those having heart failure alone. CONCLUSION: Persons with heart failure are at high risk for hip fractures. However, much of the association between hip fractures and heart failure is explained by shared risk factors. Hip fractures are a substantial contributor to mortality in men and women with heart failure.