Knowledge Check: Basic Cardiac Anatomy and Physiology
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Question 1 of 15
1. Question
Which of the following correctly describes the flow of blood into and out of the right side of the heart?
Hint
The number of leaflets making up the intracardiac valves of each side of the heart is the same as the number of lobes in the lung on that side.
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Question 2 of 15
2. Question
Which of the following correctly describes the flow of blood into and out of the left side of the heart?
Hint
Remember that veins always ultimately drain into the heart.
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Question 3 of 15
3. Question
Which of the following coronary arteries most commonly originates from the left main coronary artery?
Hint
The left coronary artery commonly has two branches.
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Question 4 of 15
4. Question
Which of the following coronary arteries most commonly originates from the right main coronary artery?
Hint
The right coronary artery commonly has three branches.
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Question 5 of 15
5. Question
Blood from the coronary circulation empties into the cardiac veins and then intothe coronary sinus, which empties into the ________________.
Hint
Consider which chamber all other deoxygenated blood returns to.
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Question 6 of 15
6. Question
Electrical impulses originate in the _______________, located at the junction of the right atrium and superior vena cava.
Hint
Which of the above structures is located in the right atrium?
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Question 7 of 15
7. Question
Which of the following structures conducts electrical impulses from the atrioventricular node to the ventricles?
Hint
Remember that the electrical impulse from the atrioventricular node must be conducted to both the right and left ventricles
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Question 8 of 15
8. Question
The P-wave of an electrocardiogram corresponds to:
Hint
Which chambers contract first in the cardiac cycle?
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Question 9 of 15
9. Question
The QRS complex of an electrocardiogram corresponds to:
Hint
Which chambers contract second in the cardiac cycle?
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Question 10 of 15
10. Question
Elevation or depression of the ________ may indicate heart muscle ischemia.
Hint
Which of the answer choices represents the complete depolarization of the ventricles?
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Question 11 of 15
11. Question
A prolonged ____________ is a risk factor for ventricular arrhythmias and death.
Hint
Which of the answer choices represents the complete depolarization and repolarization of the ventricles?
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Question 12 of 15
12. Question
In the normal heart, the oxygen saturation of blood leaving the left ventricle is:
Hint
In the normal heart, there is no mixing of oxygenated and deoxygenated blood.
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Question 13 of 15
13. Question
Under normal circumstances, approximately how much oxygen is normally extracted from the blood by the body?
Hint
Normal mixed venous saturation is around 75%.
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Question 14 of 15
14. Question
The best location to obtain a mixed venous saturation is from:
Hint
Which of the above types of lines allows one to sample venous blood that has returned from the entire body?
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Question 15 of 15
15. Question
A low mixed venous saturation may be an indication of:
Hint
A low mixed venous saturation suggests that more oxygen is being extracted by the peripheral tissues.
