UMEM Educational Pearls

Category: Critical Care

Title: Mean arterial pressure

Keywords: mean arterial pressure (PubMed Search)

Posted: 1/15/2008 by Mike Winters, MD (Updated: 10/20/2020)
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Mean Arterial Pressure

  • Arterial pressure is the input pressure for organ perfusion
  • Mean arterial pressure (MAP) is the best physiologic estimate of perfusion pressure
  • MAP is less subject to measurement variability than SBP and DBP
  • MAP remains relatively constant when measured at different sites throughout the arterial circuit
  • MAP of 60 mmHg is considered the autoregulatory threshold below which perfusion becomes compromised
  • Goal: maintain MAP > 65 mmHg
  • There is no proven value to achieving a MAP higher that 65 mmHg.  In fact, there is some literature to support that if you try and drive the MAP higher, patients do worse