Question

Calculate the cardiac output of an individual having 70 heart beats/min with a stroke volume of 55 ml.

• A. 3750 ml
• B. 125 ml
• C. 3850 ml
• D. None of the above

Answer 1

The Correct Option is C

Cardiac Output (CO) is defined as the volume of blood pumped out by each ventricle per minute. It is calculated by multiplying the Heart Rate (HR) by the Stroke Volume (SV).

The formula is:

\[ \text{Cardiac Output (CO)} = \text{Heart Rate (HR)} \times \text{Stroke Volume (SV)} \]

We are given the following values:

• Heart Rate (HR) = 70 beats/minute 
• Stroke Volume (SV) = 55 ml/beat

Now, substitute these values into the formula:

\[ \text{CO} = (70 \, \text{beats/min}) \times (55 \, \text{ml/beat}) \]

\[ \text{CO} = 70 \times 55 \, \text{ml/min} \]

\[ \text{CO} = 3850 \, \text{ml/min} \]

Therefore, the cardiac output of the individual is 3850 ml per minute.

Comparing this result with the given options:

• 3750 ml
• 125 ml
• 3850 ml
• None of the above

The correct option is 3850 ml.

Answer 2

The cardiac output (CO) is calculated using the formula:
\[ CO = \text{Heart rate (HR)} \times \text{Stroke volume (SV)} \]
Given:
Heart rate (HR) = 70 beats/min
Stroke volume (SV) = 55 ml/beat
Now, calculate the cardiac output:
\[ CO = 70 \, \text{beats/min} \times 55 \, \text{ml/beat} \]
\[ CO = 3850 \, \text{ml/min} \]

Thus, the cardiac output is 3850 ml/min.