Exploring the optimal lower blood pressure boundary during endovascular thrombectomy in patients with large vessel

Yu-Ming Chang1, Chun-Min Wang1, Kang-Po Lee2

  • 1Department of Neurology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.

Insights

Maintaining systolic blood pressure (SBP) above 130-140 mmHg during endovascular therapy (EVT) may improve functional outcomes. Minimizing blood pressure fluctuations during EVT is also associated with better results.

Area of Science:

  • Neurology
  • Interventional Radiology
  • Cardiovascular Medicine

Background:

  • Current guidelines recommend maintaining blood pressure (BP) below 180/105 mmHg during endovascular therapy (EVT).
  • The optimal lower BP boundary during EVT is not well-established and is largely based on expert consensus.
  • This study investigates the relationship between specific lower BP targets and functional outcomes after EVT.

Purpose of the Study:

  • To determine the correlation between various lower boundary targets for systolic BP (SBP) and diastolic BP (DBP) during EVT and 3-month functional outcomes.
  • To explore the association between periprocedural BP variability and functional outcomes following EVT.

Main Methods:

  • A cohort study involving 201 patients with large artery occlusion undergoing EVT within 8 hours of stroke onset.
  • Mean BP values during EVT were recorded, and logistic regression models were used to assess the association between BP targets and outcomes.
  • Analysis also included the relationship between BP variability and functional outcomes.

Main Results:

  • An SBP higher than 130 or 140 mmHg was independently associated with improved functional outcomes at 3 months (aOR 2.34-2.80).
  • SBP exceeding 130 mmHg correlated with decreased 3-month mortality (aOR 0.24).
  • Higher periprocedural SBP variability was linked to poorer functional outcomes (aOR 0.42). No significant association was found for DBP targets.

Conclusions:

  • A systolic BP range above 130-140 mmHg may represent a safe lower boundary during EVT.
  • Minimizing BP fluctuations during EVT could be crucial for improving functional outcomes.
  • These findings suggest potential adjustments to BP management strategies during EVT.
Abstract

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