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Journal Article
Multicenter Study
Randomized Controlled Trial
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Effects of early blood pressure reduction on cognitive function in patients with acute ischemic stroke.
International Journal of Stroke : Official Journal of the International Stroke Society 2016 December
BACKGROUND: The effect of early blood pressure reduction on cognitive function in patients with acute ischemic stroke remains unknown.
AIM: We tested whether antihypertensive treatment would reduce cognitive impairment in patients with acute ischemic stroke.
METHODS: In the China Antihypertensive Trial in Acute Ischemic Stroke, patients with elevated blood pressure were randomly assigned to receive antihypertensive treatment or to discontinue all hypertensive medications within 48 h of onset. Cognitive function was measured by the Mini-Mental State Examination and Montreal Cognitive Assessment at 3 months after randomization in a subsample of 638 participants.
RESULTS: Mean systolic blood pressure was reduced by 21.5 mmHg in the antihypertensive treatment group and 13.9 mmHg in the control group within 24 h after randomization (P < 0.001). Mean systolic blood pressure was 134.9 mmHg in the antihypertensive treatment group and 141.6 mmHg in the control group at day 14 after randomization (P < 0.001). Median Mini-Mental State Examination score was 26 and Montreal Cognitive Assessment score was 22 in both the antihypertensive treatment and control groups at 3 months. An Mini-Mental State Examination < 24 was present in 30.9% of patients in the antihypertensive treatment group compared with 29.7% in the control group (odds ratio = 1.06; 95% confidence interval 0.75-1.48; P = 0.75). Likewise, proportions of patients with Montreal Cognitive Assessment < 26 were similar between the antihypertensive treatment (70.6%) and control (70.7%) groups (odds ratio = 0.99; 95% confidence interval 0.70-1.40; P = 0.96).
CONCLUSIONS: These data indicated that early blood pressure reduction with antihypertensive medication in patients with acute ischemic stroke had no effect on cognitive impairment at 3 months.
AIM: We tested whether antihypertensive treatment would reduce cognitive impairment in patients with acute ischemic stroke.
METHODS: In the China Antihypertensive Trial in Acute Ischemic Stroke, patients with elevated blood pressure were randomly assigned to receive antihypertensive treatment or to discontinue all hypertensive medications within 48 h of onset. Cognitive function was measured by the Mini-Mental State Examination and Montreal Cognitive Assessment at 3 months after randomization in a subsample of 638 participants.
RESULTS: Mean systolic blood pressure was reduced by 21.5 mmHg in the antihypertensive treatment group and 13.9 mmHg in the control group within 24 h after randomization (P < 0.001). Mean systolic blood pressure was 134.9 mmHg in the antihypertensive treatment group and 141.6 mmHg in the control group at day 14 after randomization (P < 0.001). Median Mini-Mental State Examination score was 26 and Montreal Cognitive Assessment score was 22 in both the antihypertensive treatment and control groups at 3 months. An Mini-Mental State Examination < 24 was present in 30.9% of patients in the antihypertensive treatment group compared with 29.7% in the control group (odds ratio = 1.06; 95% confidence interval 0.75-1.48; P = 0.75). Likewise, proportions of patients with Montreal Cognitive Assessment < 26 were similar between the antihypertensive treatment (70.6%) and control (70.7%) groups (odds ratio = 0.99; 95% confidence interval 0.70-1.40; P = 0.96).
CONCLUSIONS: These data indicated that early blood pressure reduction with antihypertensive medication in patients with acute ischemic stroke had no effect on cognitive impairment at 3 months.
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