4b) Mean arterial blood pressure

Here is the answer to question 4b from the Physiology section:

4b) Mean arterial blood pressure

Mean arterial pressure (MAP) is the average arterial pressure during a single cardiac cycle. It is considered a better indicator of perfusion to vital organs than systolic blood pressure.

The formula for calculating MAP is:

$$\text{MAP} = \text{Diastolic Pressure} + \frac{1}{3} (\text{Systolic Pressure} - \text{Diastolic Pressure})$$

Alternatively, since Pulse Pressure (PP) is defined as Systolic Pressure - Diastolic Pressure, the formula can be written as:

$$\text{MAP} = \text{Diastolic Pressure} + \frac{1}{3} \text{Pulse Pressure}$$

A normal MAP is typically between $70 \text{ mmHg}$ and $100 \text{ mmHg}$.