Cardiology 2YU Questions

The first heart sound is caused by closure of which of the following valves?

Atrioventricular

Which of the following formulas is used to determine cardiac output?

HR x SV

Which of the following best describes the Frank-Starling law of the heart?

Intrinsic relationship between end-diastolic volume and stroke volume

Which of the following is the last part of the cardiac conductions sequence?

Purkinje fibers

Which of the following is the role of the atrioventricular node (AV node)?

Slow down impulses so that the atria can contract to fill the adjacent ventricles with blood

Which of the following is a difference between cardiac muscle and skeletal muscle?

Unlike skeletal muscle, cardiac cells can be autorhythmic

Which of the following structures contains the lowest amount of oxygen?

Vena cava

Which of the following causes the ORS complex of the electrocardiogram?

Ventricle depolarization

When do the A-V valves close during the cardiac cycle?

When ventricular pressure exceeds that of the atria