Cardiac Cycle Practice Problems

Identify the incorrect statement about cardiac output.

Which of the following correctly describes the sequence of events in a cardiac cycle?

Aortic stenosis develops when the aortic valve narrows and blood flow becomes restricted. Identify the heart sound that the doctor may hear with a stethoscope in a person with aortic valve stenosis.

Which of the following is not associated with the first heart sound "lubb"?

Which of the following conditions is/are associated with a heart murmur?

Which of the following events does not occur during systole?

What is ejection fraction?

Which of the following statements is not true about the dicrotic notch that occurs in the cardiac cycle?

Which of the following is a shared characteristic of the SA and the AV nodes?

Choose which statement is correct regarding the cardiac cycle.

I. Asystole indicates that the heart is in sinus rhythm

II. Systole occurs when the heart contracts to pump blood out

During atrial systole what happens to the ventricles:

What happens during the systole phase of the cardiac cycle?

Which of the following statements about isovolumetric relaxation is false?

The following can increase the cardiac output, except:

Which of the following is not included in calculating cardiac output?

Abnormal levels of electrolytes, especially potassium, can affect the electrical conduction system of the heart and lead to bradycardia. How does bradycardia impact the cardiac process?

After consuming an excessive amount of caffeinated beverages, Mark experienced palpitations. What could be its repercussions for the heart?

The volume of blood pumped by the heart per unit of time, typically measured in liters per minute (L/min), is known as:

Which coronary artery is often referred to as the "widowmaker" due to its critical role in supplying blood to a large portion of the heart?

Which of the following is responsible for the circulation of blood from the left atrium to the right atrium?

Which of the following definitions of the heart cycle is correct?

At which stage of the cardiac cycle are the two atria filling up with blood?

A condition in which the left ventricle is unable to effectively pump blood out to the body, causing a backup of blood in the lungs, is termed:

Through which of the following valves does the blood leave the left ventricle?

What happens during isovolumetric relaxation in the cardiac cycle?

Cardiac tamponade is an emergency where the blood pools around the heart. Which covering of the heart is commonly associated with cardiac tamponade:

The mitral valve separates the left atrium and left ventricle. This valve is also known as:

Which of the following act as doors between the heart chambers that regulate blood flow?

The thicker wall of the left ventricle allows it to:

Which of the following terms is accurately matched with the corresponding structure?

Which heart valve has two cusps anchored to the papillary muscles by chordae tendineae?

Which of the following statements is true regarding the thickness of ventricular walls? 

Which chambers of the heart are the actual pumps responsible for propelling blood out of the heart and into circulation?

Which valve is located on the left side of the heart and consists of two flaps or cusps?

During which phase of the cardiac cycle do the atria contract, exerting pressure to move blood into the ventricles?

Identify the correct relation of venous return with stroke volume (SV) and cardiac output (CO) according to the Frank-Starling law of the heart.

What does cardiac output represent?

What does afterload refer to in relation to the stroke volume index?

What happens to cardiac output when the heart rate continues to climb beyond 160–180 bpm?

If the heart rate is 90 bpm and the stroke volume is 70 mL per beat, what is the cardiac output?

All of the following conditions result in increased cardiac output, except:

Ventricular filling time is the amount of time that blood flows into and fills the ventricles of the heart. Which of the following factors results in a shorter ventricular filling time?

All of the following medications increase the force of myocardial contraction, leading to an increase in stroke volume, except:

Choose which statement is correct regarding the end-systolic volume:

With mitral insufficiency, blood leaks backward from the left ventricle into the left atrium during systole. What is the effect of this regurgitation?

A patient's heart rate is 62 beats per minute, and his stroke volume is 60 mL with each contraction. How much cardiac output does he have?

Why is coronary perfusion generally reduced during systole?