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Blood pressure and the risk of rebleeding and delayed cerebral ischemia after aneurysmal subarachnoid hemorrhage

  • Celine S Gathier
  • , IJsbrand A J Zijlstra
  • , Gabriel J E Rinkel
  • , T Katrien J Groenhof
  • , Dagmar Verbaan
  • , Bert A Coert
  • , Marcella C A Müller
  • , Walter M van den Bergh
  • , Arjen J C Slooter
  • , Marinus J C Eijkemans

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

INTRODUCTION AND OBJECTIVE: Blood pressure is presumably related to rebleeding and delayed cerebral ischemia (DCI) after subarachnoid hemorrhage (aSAH) and could serve as a target to improve outcome. We assessed the associations between blood pressure and rebleeding or DCI in aSAH-patients.

MATERIALS AND METHODS: In this observational study in 1167 aSAH-patients admitted to the intensive care unit (ICU), adjusted hazard ratio's (aHR) were calculated for the time-dependent association of blood pressure and rebleeding or DCI. The aHRs were presented graphically, relative to a reference mean arterial pressure (MAP) of 100 mmHg and systolic blood pressure (sBP) of 150 mmHg.

RESULTS: A MAP below 100 mmHg in the 6, 3 and 1 h before each moment in time was associated with a decreased risk of rebleeding (e.g. within 6 h preceding rebleeding: MAP = 80 mmHg: aHR 0.30 (95% confidence interval (CI) 0.11-0.80)). A MAP below 60 mmHg in the 24 h before each moment in time was associated with an increased risk of DCI (e.g. MAP = 50 mmHg: aHR 2.59 (95% CI 1.12-5.96)).

CONCLUSIONS: Our results suggest that a MAP below 100 mmHg is associated with decreased risk of rebleeding, and a MAP below 60 mmHg with increased risk of DCI.

Original languageEnglish
Article number154124
JournalJournal of Critical Care
Volume72
Early online date5 Oct 2022
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Aneurysmal subarachnoid hemorrhage
  • Blood pressure
  • Delayed cerebral ischemia
  • Intensive care
  • Rebleeding

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