Mean Arterial Pressure (MAP)

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Mean Arterial Pressure (MAP)

Reflects average arterial pressure for assessing tissue perfusion

All tools /

Mean Arterial Pressure (MAP)

Reflects average arterial pressure for assessing tissue perfusion

Systolic BP (SBP)

Instructions

The Mean Arterial Pressure (MAP) calculator provides an estimate of the average arterial pressure during a full heartbeat. It is derived from routine blood pressure readings and offers a more complete picture of circulation than systolic or diastolic pressure alone.

MAP is widely used to check if organs and tissues are receiving enough blood flow. In practice, it is often monitored in emergency and critical care settings, during surgery, or when patients require medications that affect blood pressure.

MAP is calculated quickly at the bedside or in critical care settings. It should be used as part of a complete assessment of cardiovascular status.

Overview

When to use

Why use

Evidences

Interpretation

MAP = 1/3*(Systolic BP) + 2/3*(Diastolic BP)

MAP Table

MAP value	Interpretation
<60	Low Perfusion
60-69	Borderline low
70-100	Normal
100-110	Elevated
>110	High

Sepsis and shock target of MAP≥65 mmHg: The SEPSISPAM randomized trial (n=776) compared MAP targets 65–70 vs 80–85 mmHg in septic shock; no overall mortality difference, but patients with chronic hypertension in the higher-target arm had less need for renal replacement therapy, supporting MAP≥65 mmHg as a default with individualized higher targets for chronic hypertensives. A meta-analysis and guideline-aligned reviews concur that universal elevation above 65 mmHg does not improve mortality, emphasizing individualized goals.
https://pmc.ncbi.nlm.nih.gov/articles/PMC4303164/

Neurocritical care and cerebral perfusion pressure: Cerebral perfusion pressure is CPP = MAP − ICP; neurocritical guidance emphasizes maintaining adequate MAP to achieve CPP targets in traumatic brain injury and subarachnoid hemorrhage, reflecting MAP’s direct role in brain blood flow when autoregulation is impaired.
https://www.atsjournals.org/doi/full/10.1164/rccm.201908-1581ST

Overview

When to use

Why use

Evidences

Mean Arterial Pressure is a vital hemodynamic parameter that helps clinicians assess whether organs and tissues are receiving enough blood flow. Unlike systolic or diastolic pressure alone, MAP represents an average driving force for circulation throughout the cardiac cycle.

It is particularly important in critical care, anesthesia, and shock management, where maintaining perfusion is essential. Clinicians often target specific MAP ranges when treating sepsis, trauma, or patients requiring vasoactive medications.

MAP is also useful for monitoring patients with chronic hypertension or cerebrovascular disease. As a simple calculation from blood pressure readings, it offers a fast and reliable way to guide treatment decisions.