Background: Preventing early aneurysm rebleeding is crucial in the management of aneurysmal subarachnoid hemorrhage (SAH). Lowering systolic blood pressure (SBP) has been proposed as a potential strategy, but the evidence remains inconclusive. This systematic review and meta-analysis aimed to determine if a specific SBP target could reduce the risk of aneurysm rebleeding prior to treatment.
Methods: Electronic databases were systematically searched for studies comparing SBP between SAH patients with and without aneurysm rebleeding before surgical treatment. Data on SBP values, patient characteristics, and rebleeding events were extracted. Meta-analyses were performed to pool mean SBP differences and odds ratios (ORs) for rebleeding at different SBP cut-offs.
Results: Ten studies were included in the systematic review. Pooled data from the included studies showed that the mean SBP was higher in the rebleeding group (mean difference 5.89, 95 % CI 1.94 to 9.85). SBP ≤160 mmHg was associated with lower rebleeding risk (OR 0.30, 95 % CI 0.14 to 0.65). However, substantial heterogeneity and limitations in study designs and definitions were noted.
Conclusions: This meta-analysis suggests that SAH patients with rebleeding may present with higher SBP. However, the findings should be interpreted cautiously due to study limitations. Future prospective studies with standardized definitions and comprehensive data collection are needed to elucidate the complex relationship between blood pressure dynamics and rebleeding risk in SAH.
Keywords: Rebleeding; SAH; SBP; Subarachnoid hemorrhage; Systolic blood pressure.
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