Q: Which of the following is a correct formula for calculating mean arterial pressure (MAP)?

$$MAP = \text{Diastolic Pressure} + \frac{1}{3}(\text{Systolic Pressure} - \text{Diastolic Pressure})$$

Question 1

During the cardiac cycle, what event is associated with the S1 heart sound?

Accepted Answer

Closure of the atrioventricular (AV) valves

Question 2

A patient has a blood pressure of 130/85 mmHg. What is their mean arterial pressure (MAP)? Use the formula $$MAP = 	ext{Diastolic Pressure} + \frac{1}{3}(	ext{Systolic Pressure} - 	ext{Diastolic Pressure}).$$

Accepted Answer

$$MAP = 85 + \frac{1}{3}(130 - 85) = 85 + 15 = 100$$ mmHg

Question 3

Which of the following best describes the difference between palpation and auscultation?

Accepted Answer

Palpation is feeling the pulse at peripheral arteries; auscultation is listening to heart sounds with a stethoscope.

Question 4

Which artery is commonly used to palpate the pulse at the wrist?

Accepted Answer

Radial artery

Question 5

What is the physiological cause of the Korotkoff sounds heard during blood pressure measurement?

Accepted Answer

Turbulent blood flow through a partially constricted artery

Question 6

At which point in the cardiac cycle does the end-diastolic volume (EDV) occur?

Accepted Answer

Just before ventricular systole begins

Question 7

A patient’s blood pressure is measured as 150/95 mmHg. According to clinical guidelines, how would this be classified?

Accepted Answer

Hypertension

Question 8

Which heart valve is best auscultated at the left 5th intercostal space at the midclavicular line?

Accepted Answer

Mitral (bicuspid) valve

Question 9

What is the pulse pressure if a patient’s blood pressure is 120/80 mmHg?

Accepted Answer

$$120 - 80 = 40$$ mmHg

Question 10

Which event marks the transition from ventricular systole to ventricular diastole in the cardiac cycle?

Accepted Answer

SL valves close

Question 11

A patient’s pulse is irregular. How should you accurately determine their heart rate?

Accepted Answer

Count the pulse for a full minute

Question 12

Which of the following best describes the sequence of valve events at the start of ventricular systole?

Accepted Answer

AV valves close, SL valves open

Question 13

Which site is most appropriate for auscultating the aortic valve?

Accepted Answer

Right sternal border at the 2nd intercostal space

Question 14

If the onset of Korotkoff sounds is heard at 140 mmHg and the disappearance at 90 mmHg, what is the patient’s blood pressure?

Accepted Answer

140/90 mmHg

Question 15

Which of the following is a correct formula for calculating mean arterial pressure (MAP)?

Accepted Answer

$$MAP = 	ext{Diastolic Pressure} + \frac{1}{3}(	ext{Systolic Pressure} - 	ext{Diastolic Pressure})$$

Question 16

Which of the following best explains why Korotkoff sounds disappear as cuff pressure drops below diastolic pressure?

Accepted Answer

The artery is fully open and blood flow becomes laminar

Question 17

Which pulse site is located in the groin and is commonly used in emergency situations to assess circulation to the lower limb?

Accepted Answer

Femoral artery

Question 18

A patient’s blood pressure is 85/55 mmHg. How would this be classified?

Accepted Answer

Hypotension

Question 19

Which of the following best describes the physiological significance of the S2 heart sound?

Accepted Answer

Closure of the semilunar valves at the end of ventricular systole

Question 20

Which of the following is the best explanation for why the pulse is most easily palpated at sites where arteries run over bones with little soft tissue?

Accepted Answer

The artery is closer to the surface and less cushioned, making the pulse easier to feel

Human Cardiovascular Physiology: Cardiac Cycle, Heart Sounds, Pulse, and Blood Pressure

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