Q: If a patient’s heart rate is 80 beats per minute and their stroke volume is 70 mL, what is their cardiac output? Use the formula $$CO = HR \times SV.$$

$$CO = 80 \times 70 = 5600 mL/$$min

Q: A patient’s heart rate increases from 70 to 100 beats per minute, but their stroke volume decreases from 70 mL to 50 mL. What is the new cardiac output? Use $$CO = HR \times SV.$$

$$CO = 100 \times 50 = 5000 mL/$$min

Question 1

Which of the following best describes the correct anatomical location for auscultating the mitral valve during a heart examination?

Accepted Answer

At the left midclavicular line, fifth intercostal space

Question 2

A patient presents with a heart murmur best heard at the left sternal border, fourth intercostal space. Which valve is most likely affected?

Accepted Answer

Tricuspid valve

Question 3

During auscultation, you hear a distinct 'lub-dub' sound. What is the physiological cause of the 'lub' sound?

Accepted Answer

Closure of the atrioventricular valves

Question 4

Which of the following best explains why the stethoscope diaphragm is used for auscultating high-pitched heart sounds?

Accepted Answer

The diaphragm is designed to detect high-frequency sounds such as S1 and S2

Question 5

A patient has a murmur that is best heard at the right sternal border, second intercostal space. Which valve is most likely involved?

Accepted Answer

Aortic valve

Question 6

If a patient’s heart rate is 80 beats per minute and their stroke volume is 70 mL, what is their cardiac output? Use the formula $$CO = HR 	imes SV.$$

Accepted Answer

$$CO = 80 	imes 70 = 5600 mL/$$min

Question 7

Which of the following is the correct sequence of heart valve closure during a normal cardiac cycle?

Accepted Answer

Atrioventricular valves close, then semilunar valves close

Question 8

A patient is found to have a heart sound occurring just after the S2 sound. Which of the following is the most likely explanation?

Accepted Answer

Rapid ventricular filling (S3)

Question 9

Which area is best for auscultating the pulmonary valve?

Accepted Answer

Left sternal border, second intercostal space

Question 10

When using a stethoscope, why is it important to place the diaphragm firmly against the chest wall?

Accepted Answer

To minimize external noise and maximize transmission of high-frequency sounds

Question 11

A patient with mitral valve stenosis will most likely have a murmur best heard at which location?

Accepted Answer

Left midclavicular line, fifth intercostal space

Question 12

Which of the following best describes the function of the bell of the stethoscope?

Accepted Answer

It is used to detect low-frequency sounds such as S3 and S4

Question 13

A patient’s heart rate increases from 70 to 100 beats per minute, but their stroke volume decreases from 70 mL to 50 mL. What is the new cardiac output? Use $$CO = HR 	imes SV.$$

Accepted Answer

$$CO = 100 	imes 50 = 5000 mL/$$min

Question 14

Which of the following is a common cause of a heart murmur detected during auscultation?

Accepted Answer

Turbulent blood flow due to valve stenosis or regurgitation

Question 15

During a physical exam, you notice a split S2 sound. Which physiological event is most likely responsible?

Accepted Answer

Delayed closure of the pulmonary valve during inspiration

Question 16

Which of the following best describes the location for auscultating the tricuspid valve?

Accepted Answer

Left sternal border, fourth intercostal space

Question 17

A patient is found to have an extra heart sound just before S1. What is the most likely cause?

Accepted Answer

Atrial contraction (S4)

Question 18

Which of the following is the best method for distinguishing between S1 and S2 heart sounds during auscultation?

Accepted Answer

S1 coincides with the carotid pulse, S2 follows after

Question 19

Which of the following statements about heart auscultation is correct?

Accepted Answer

Each heart valve is best auscultated at a specific location on the chest wall

Heart Auscultation and Examination: Anatomy & Physiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards