Comparative Study
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Cerebral ischemia and deterioration with lower blood pressure target in intracerebral hemorrhage.

Neurology 2018 September 12
OBJECTIVE: To determine the incidence and predictors of acute cerebral ischemia and neurologic deterioration in intracerebral hemorrhage (ICH) patients after an institutional protocol change in systolic blood pressure (SBP) target from <160 to <140 mm Hg.

METHODS: We retrospectively compared persons admitted with primary ICH before and after a protocol change in SBP target from <160 to <140 mm Hg. The primary outcomes were presence of acute cerebral ischemia on MRI completed within 2 weeks of ICH and acute neurologic deterioration.

RESULTS: Of 286 persons with primary ICH, 119 underwent MRI and met inclusion criteria. Sixty-two had a target SBP <160 mm Hg (group 1) and 57 had a target SBP <140 mm Hg (group 2). There were no differences between the 2 groups in baseline clinical and radiographic characteristics, but over the first 24 hours of hospitalization, group 2 had lower mean SBP (134 vs 143 mm Hg, p < 0.001) and lower minimum SBP over 72 hours (106 vs 112 mm Hg, p = 0.02). Acute cerebral ischemia was more frequent in group 2 than in group 1 (32% vs 16%; p = 0.047) as was acute neurologic deterioration (19% vs 5%; p = 0.022). A minimum SBP ≤120 mm Hg over 72 hours was associated with cerebral ischemia, while no patient with a minimum SBP ≥130 mm Hg had cerebral ischemia. Acute cerebral ischemia was significantly associated with worse discharge NIH Stroke Scale score, while SBP target was not.

CONCLUSIONS: Intensive lowering of SBP <140 mm Hg in acute ICH, particularly allowing SBP <120 mm Hg, is associated with increased remote cerebral ischemic lesions and acute neurologic deterioration.

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