Mean Arterial Pressure (MAP)

Mean arterial pressure is the average pressure in your arteries during one cardiac cycle. It determines how well organs like the brain, kidneys and heart muscle are perfused. A MAP of at least 65 mmHg is generally considered the minimum needed for adequate perfusion.

The standard clinical formula is MAP ≈ (SBP + 2 × DBP) / 3. For example, at 120/80 mmHg, MAP = (120 + 160) / 3 = 93.3 mmHg. Diastolic pressure is weighted twice because the heart spends roughly two-thirds of the cardiac cycle in diastole.

70 to 100 mmHg is considered the normal range for healthy adults. Values below 65 mmHg can signal hypoperfusion of vital organs. Values persistently above 100 mmHg point toward hypertension and increased cardiovascular risk.

A MAP below 65 mmHg is considered critical, especially in intensive care. In conscious patients it may cause dizziness, weakness or confusion. Common causes include hypovolemia, sepsis, heart failure or medication side effects.

In older adults (≥ 65 years) cerebral autoregulation is often impaired. A slightly higher MAP — typically 70–90 mmHg — is often targeted to maintain brain perfusion. The individual target should be set by the treating physician.

No. The formula (SBP + 2 × DBP) / 3 is a simplified estimate. It is useful for home orientation but does not replace direct arterial measurement or medical diagnosis. See a doctor for persistent abnormal readings.