Effects of low blood pressure in cognitively impaired elderly patients treated with antihypertensive drugs

JAMA Internal Medicine
Enrico MosselloAndrea Ungar

Abstract

The prognostic role of high blood pressure and the aggressiveness of blood pressure lowering in dementia are not well characterized. To assess whether office blood pressure, ambulatory blood pressure monitoring, or the use of antihypertensive drugs (AHDs) predict the progression of cognitive decline in patients with overt dementia and mild cognitive impairment (MCI). Cohort study between June 1, 2009, and December 31, 2012, with a median 9-month follow-up of patients with dementia and MCI in 2 outpatient memory clinics. Cognitive decline, defined as a Mini-Mental State Examination (MMSE) score change between baseline and follow-up. We analyzed 172 patients, with a mean (SD) age of 79 (5) years and a mean (SD) MMSE score of 22.1 (4.4). Among them, 68.0% had dementia, 32.0% had MCI, and 69.8% were being treated with AHDs. Patients in the lowest tertile of daytime systolic blood pressure (SBP) (≤ 128 mm Hg) showed a greater MMSE score change (mean [SD], -2.8 [3.8]) compared with patients in the intermediate tertile (129-144 mm Hg) (mean [SD], -0.7 [2.5]; P = .002) and patients in the highest tertile (≥ 145 mm Hg) (mean [SD], -0.7 [3.7]; P = .003). The association was significant in the dementia and MCI subgroups only among patient...Continue Reading

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