Circulatory Resistance Notes

Total Peripheral Resistance (TPR) measures the resistance to blood flow in the systemic circulation. It can be calculated using:

$$\text{Blood Pressure} = \text{Cardiac Output} * \text{Total Peripheral Resistance}$$

$$\text{Total Peripheral Resistance} = \frac{\text{Blood Pressure}}{\text{Cardiac Output}}$$

$$\text{Total Peripheral Resistance} = \frac{\text{Blood Pressure}}{\text{Heart Rate * Stroke Volume}}$$

Units would be $$\begin{align*} \text{Total Peripheral Resistance} &= \frac{\text{force / area}}{\text{rate * volume}} \\\\ &= \text{force} * \text{area}^{-1} * \text{rate}^{-1} * \text{volume}^{-1} \\\\ &= \frac{\text{mass * distance}}{\text{time}^2} * \frac{1}{\text{distance}^2} * \text{time} * \frac{1}{\text{distance}^3} \\\\ &= \text{mass} * \text{distance}^{-4} * \text{time}^{-1} \end{align*}$$