Cardiovascular System Review Part 2

Front

What does ventricular contraction represent in the cardiac cycle?

Back

Ventricular contraction is the phase of the cardiac cycle where the ventricles contract to pump blood out of the heart.

Front

When does atrial diastole occur in relation to the ECG?

Back

Atrial diastole occurs from the QRS complex to the start of the next P wave.

Front

What causes the 'Lub' sound in the heart?

Back

The 'Lub' sound is caused by the contraction of the ventricles, which closes the atrioventricular valves.

Front

What does the P wave of an ECG represent?

Back

The P wave represents atrial systole, which is the contraction of the atria.

Front

What is cardiac output?

Back

Cardiac output is the amount of blood pumped from the heart per minute.

Front

What is the role of the ventricles during the cardiac cycle?

Back

The ventricles are responsible for pumping blood to the lungs and the rest of the body during contraction.

Front

What is the significance of the QRS complex in an ECG?

Back

The QRS complex represents ventricular depolarization, which leads to ventricular contraction.

Front

What happens during atrial systole?

Back

During atrial systole, the atria contract to push blood into the ventricles.

Front

What is the relationship between heart rate and cardiac output?

Back

Cardiac output is the product of heart rate and stroke volume; an increase in either can increase cardiac output.

Front

What is the difference between systole and diastole?

Back

Systole refers to the contraction phase of the heart, while diastole refers to the relaxation phase.