A comparison of left ventricular abnormalities associated with glucose intolerance in African Caribbeans and Europeans in the UK


Chaturvedi, N; McKeigue, PM; Marmot, MG; Nihoyannopoulos, P; (2001) A comparison of left ventricular abnormalities associated with glucose intolerance in African Caribbeans and Europeans in the UK. Heart (British Cardiac Society), 85 (6). pp. 643-8. ISSN 1355-6037

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Abstract

OBJECTIVE: To determine whether abnormalities of the left ventricle differ by glucose tolerance status, to explore reasons for differences, and to assess ethnic differences in these relations. DESIGN: Population based prevalence study. SETTING: London, UK. PATIENTS: 1152 African Caribbeans and Europeans. METHODS: Echocardiograms, blood pressure, obesity, fasting and two hour blood glucose, insulin and lipids, and urinary albumin excretion rate were measured. MAIN OUTCOME MEASURES: Left ventricular mass index, wall thickness, and early (E) to atrial (A) wave ratio. RESULTS: Left ventricular mass index was greater in diabetic Europeans than in normoglycaemic Europeans (mean (SE), 95.6 (5.0) v 79.7 (0.8) g/m(2), p = 0.001) and in diabetic African Caribbeans than in normoglycaemic African Caribbeans (88.6 (2.5) v 82.4 (0.9) g/m(2), p = 0.02). Similar, but weaker associations were observed for the E:A ratio. beta Coefficients between left ventricular mass index and fasting glucose in the normoglycaemic range, adjusted for age and sex, were 2.43 in Europeans (p = 0.05) and 3.74 in African Caribbeans (p = 0.02). These were attenuated to 1.19 (p = 0.4) and 3.03 (p = 0.08) in Europeans and African Caribbeans, respectively, when adjusted further for blood pressure and obesity. Adjustments for other risk factors made little difference to the coefficients. There were no ethnic differences in risk factor relations. CONCLUSIONS: Abnormalities of the left ventricle occur in response to glucose intolerance and are observable into the normoglycaemic range. These disturbances are largely accounted for by associated obesity and hypertension. African Caribbeans have a greater degree of left ventricular structural impairment, emphasising the importance of tight blood pressure control.

Item Type: Article
Keywords: echocardiography, glucose tolerance, left ventricular mass, index, ethnic differences, Dependent diabetic-patients, ambulatory blood-pressure, systolic-time intervals, m-mode echocardiography, cardiovascular-disease, insulin-resistance, diastolic function, hypertension, mellitus, heart, Adult, Caribbean Region, ethnology, Comparative Study, Cross-Sectional Studies, Echocardiography, Female, Glucose Intolerance, ethnology, Great Britain, Human, Hypertrophy, Left Ventricular, ethnology, ultrasonography, Male, Middle Age, Regression Analysis, Support, Non-U.S. Gov't
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Non-Communicable Disease Epidemiology
PubMed ID: 11359744
Web of Science ID: 169068000017
URI: http://researchonline.lshtm.ac.uk/id/eprint/16783

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