What it means
Because the heart spends longer relaxing than squeezing, the average is closer to the diastolic pressure. It can be estimated as (systolic + 2 × diastolic) ÷ 3, and many monitors show it automatically. A normal range is about 70 to 100 mm Hg, and at least 65 mm Hg is usually needed to keep the organs supplied with blood.
For the nurse
In critically ill clients, the provider often orders a MAP goal, such as above 65 mm Hg, and fluids or drugs are adjusted to keep it there. Report a MAP below the goal.
In a chart
"BP 90/50, MAP 63; provider notified."
At a glance
| Abbreviations | MAP |
|---|---|
| Also written | MAP |
Related terms
blood pressure
The force of blood pushing against the walls of the arteries, written as systolic over diastolic in mm Hg.
perfusion
The flow of blood through the body's tissues, bringing them oxygen and nutrients.
cardiogenic shock
A type of shock in which the heart cannot pump enough blood to supply the body's organs.
afterload
The resistance the heart's ventricles must push against to send blood out into the arteries.