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Pulse Pressure & MAP

Pulse Pressure = Systolic − Diastolic. Healthy 30-40. High PP = arterial stiffness, low PP = cardiac output concern. MAP = Diastolic + (PP/3); target 70-100 mmHg.

122 mmHg
80 mmHg
Pulse Pressure
42 mmHg
Normal
Mean Arterial Pressure
94.0 mmHg
Normal

How it works

Pulse Pressure (PP) = Systolic − Diastolic. Mean Arterial Pressure (MAP) = Diastolic + (PP ÷ 3) — an estimate of perfusion pressure during one cardiac cycle. MAP ≥ 65 mmHg is generally needed to perfuse vital organs; ICU teams target 70–100 mmHg. The PP/3 weighting reflects that diastole occupies roughly two-thirds of the cardiac cycle at resting heart rates.

Worked example

A 58-year-old man from Chennai records 142/76 mmHg on his home monitor. PP = 142 − 76 = 66 mmHg (high — suggests arterial stiffness, common after 55 in Indian adults). MAP = 76 + (66/3) = 98 mmHg (within normal). Per ICMR's 2024 cardiovascular guidance, sustained PP > 60 in Indians is an independent predictor of stroke risk and warrants endothelial-function review.

When to use this

  • Hypertension follow-up — tracking PP trend alongside systolic / diastolic
  • Pre-anaesthesia and surgery planning where MAP targets matter
  • Diabetic patients (PP rises faster due to glycation of arterial walls)
  • Athletes monitoring training response — resting PP usually drops with aerobic fitness

For cardiovascular risk context, check our BMI calculator (Asian-Indian cut-offs) and read about the IDRS diabetes risk screen that flags many Indians with silent hypertension.

FAQ

My PP is 65 — should I worry?

High PP > 60 mmHg suggests arterial stiffness — common with aging, hypertension, atherosclerosis. Talk to a doctor about cardiovascular risk + lifestyle changes.

Why does MAP matter more than systolic?

MAP represents the average force perfusing organs throughout the cardiac cycle. Below 60-65 means inadequate organ perfusion. Above 100 strains the arterial walls.

Athletes have low PP — concerning?

Generally not. Low PP from low resting heart rate (good cardiac efficiency). PP < 30 with symptoms (fatigue, dizziness) warrants investigation, but resting low PP in trained individuals is normal.