If a person's heart rate is 75 beats per minute, what is their cardiac output if
Practice Questions
Q1
If a person's heart rate is 75 beats per minute, what is their cardiac output if the stroke volume is 70 mL?
5.25 L/min
4.5 L/min
6.0 L/min
3.0 L/min
Questions & Step-by-Step Solutions
If a person's heart rate is 75 beats per minute, what is their cardiac output if the stroke volume is 70 mL?
Step 1: Understand that cardiac output is the amount of blood the heart pumps in one minute.
Step 2: Know the formula for calculating cardiac output: Cardiac Output = Heart Rate x Stroke Volume.
Step 3: Identify the heart rate given in the question, which is 75 beats per minute.
Step 4: Identify the stroke volume given in the question, which is 70 mL per beat.
Step 5: Multiply the heart rate (75 beats/min) by the stroke volume (70 mL/beat).
Step 6: Perform the multiplication: 75 x 70 = 5250 mL/min.
Step 7: Convert the result from mL/min to L/min by dividing by 1000: 5250 mL/min = 5.25 L/min.
Cardiac Output Calculation – Cardiac output is the volume of blood the heart pumps per minute, calculated by multiplying heart rate (beats per minute) by stroke volume (milliliters per beat).
