Basics of Cardiac Output for Cardiophysiology

The video tutorial explains cardiac output, a key physiological parameter of heart function. It describes cardiac output as the volume of blood the heart pumps per minute, determined by heart rate and stroke volume. The tutorial provides a formula for calculating cardiac output and demonstrates a sample calculation for a resting adult. It also discusses factors affecting cardiac output, such as body size and athletic training.

What does cardiac output measure in terms of heart function?

• The pressure of blood in the arteries

• The number of heartbeats per minute

• The efficiency of the heart as a pump

• The amount of blood pumped by the heart per beat

Which two parameters are crucial in determining cardiac output?

• Blood pressure and heart rate

• Heart rate and stroke volume

• Oxygen level and heart rate

• Stroke volume and blood pressure

How is stroke volume defined?

• The amount of blood ejected per minute

• The amount of blood ejected per beat

• The number of beats per minute

• The pressure of blood in the veins

What is the formula for calculating cardiac output?

• Heart rate divided by stroke volume

• Stroke volume times heart rate

• Heart rate plus stroke volume

• Stroke volume minus heart rate

Why do we divide by 1,000 when calculating cardiac output in liters per minute?

• To convert stroke volume to liters

• To convert heart rate to beats per minute

• To convert cardiac output to liters per minute

• To adjust for body size differences

What is the average cardiac output for a resting adult in liters per minute?

• 5 liters per minute

• 3 liters per minute

• 7 liters per minute

• 10 liters per minute

How does athletic training affect cardiac output?

• It only affects heart rate

• It increases cardiac output

• It has no effect on cardiac output

• It decreases cardiac output