Factors determining the 24-h blood pressure profile in normotensive patients with type 1 and type 2 diabetes

Journal of Human Hypertension
V SpalloneG Menzinger

Abstract

Some controversy still exists about factors involved in the abnormal circadian pattern of blood pressure (BP) in diabetes, while prognostic value of non-dipping condition is being increasingly recognised. This study was aimed at evaluating the relative influence of autonomic neuropathy (AN) and albumin excretion on 24-h BP profile in type 1 and type 2 diabetes. We measured AN cardiovascular tests, 24-h ambulatory BP, and urinary albumin excretion rate (UAE) in 47 type 1 and 34 type 2 normotensive non-proteinuric diabetic patients. In type 1 diabetic patients day-night differences (Delta) in systolic and diastolic BP were lower in those with AN than in those without (3 +/- 9 vs 10 +/- 6%, P < 0.01, and 8 +/- 9 vs 16 +/- 6%, P < 0.001), and in univariate regression analysis they were inversely related to both autonomic score, index of degree of AN (r = -0.61, P < 0.001 and r = -0.65, P < 0.001), and to 24-h UAE (r = -0.39, P < 0.01 and r = -0.46, P < 0.001). In type 1 diabetic patients AN was also associated with lower nocturnal decrease in UAE (patients with AN vs without AN: -37 +/- 214 vs 49 +/- 37%, P < 0.05), and with a stronger relationship between simultaneous 24-h UAE and 24-h BP (for systolic BP patients with AN vs witho...Continue Reading

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