Question

A patient has a cardiac output of 6500 ml per minute and stroke volume of 50 ml. Find his pulse in beats per minute.

• A. 50.5
• B. 92.5
• C. 130
• D. 72

Answer 1

The correct option is C 130

Cardiac output is defined as the amount of blood pumped by heart in a minute. It is calculated as the product of heart rate (number of heart contractions or beats per minute also called pulse rate) and stroke volume (amount of blood each ventricle of heart pumps in 1 contraction) i.e.,

$CardiacOutput=HeartRateXStrokeVolume\_\_\_\_\_\_\left(i\right)$

Given: Cardiac output of patient = 6500 ml
Stroke Volume of patient = 50 ml

To find: Heart rate or pulse rate in beats per minute

Calculation: Replacing given values in equation (i),

$6500=HeartRateX50$
Rearranging we get,

$HeartRate=\frac{6500}{50}=130beatsperminute$

Hence, the pulse rate of the patient is 130 beats per minute.