Topics:
Animal Physiology, Animal Refresher
Formula for Mean Arterial Pressure
Mean arterial pressure is-
- Average of systolic & diastolic pressure
- Systolic pressure + 1/3 pulse pressure
- Diastolic pressure + 1/3 pulse pressure — Correct Answer
- Systolic pressure + diastolic pressure
Explanation:
Correct Answer: Diastolic pressure + 1/3 pulse pressure
MAP = Diastolic pressure + 1/3 × Pulse pressure, where Pulse pressure = Systolic − Diastolic pressure.
Why Not a Simple Average?
- The cardiac cycle spends approximately 2/3 of its time in diastole and 1/3 in systole
- MAP is therefore weighted more heavily toward diastolic pressure
- Example: BP = 120/80 mmHg → Pulse pressure = 40 → MAP = 80 + (40/3) = 80 + 13.3 ≈ 93 mmHg
Related Cardiovascular Formulas
- Pulse pressure = Systolic − Diastolic pressure
- MAP = Cardiac output × Total peripheral resistance
- Cardiac output = Stroke volume × Heart rate
- Stroke volume = Volume of blood pumped by left ventricle per contraction
Normal Blood Pressure (mmHg, Syst/Diast)
- Cattle: 134/88 | Sheep: 114/68 | Goat: 120/84
- Pig: 169/108 | Horse: 80/50 | Dog: 148/100 | Chicken: 131/95
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
