During auscultation of the heart, a mid-diastolic rumble with an opening snap
is heard best at the apex with the bell of the stethoscope while the patient is in
the left lateral decubitus position. Which valvular abnormality does this finding
most likely indicate?
A. Aortic stenosis
B. Mitral stenosis
C. Mitral regurgitation
D. Aortic regurgitation
Correct Answer: B - Mitral stenosis
RATIONALE
A mid-diastolic rumble with an opening snap at the apex is
characteristic of mitral stenosis, caused by turbulent flow across a
narrowed mitral valve. Aortic stenosis produces a systolic
crescendo-decrescendo murmur, mitral regurgitation a holosystolic
murmur, and aortic regurgitation an early diastolic decrescendo
murmur.
Question 2
A patient presents with sudden onset of severe, sharp chest pain that radiates to
the back, along with a blood pressure differential of 20 mm Hg between arms.
Which assessment finding is most critical to obtain next?
A. Obtain a 12-lead ECG
B. Auscultate for a diastolic murmur
C. Palpate peripheral pulses
D. Measure oxygen saturation
Correct Answer: C - Palpate peripheral pulses
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, RATIONALE
The presentation suggests aortic dissection. Palpating peripheral
pulses is critical to assess for pulse deficits, which indicate
compromised blood flow to extremities. While ECG and murmur
assessment are relevant, pulse evaluation is most specific for
dissection complications.
Question 3
Which cranial nerve is assessed by asking the patient to shrug the shoulders
against resistance and turn the head against resistance?
A. Cranial nerve IX
B. Cranial nerve X
C. Cranial nerve XI
D. Cranial nerve XII
Correct Answer: C - Cranial nerve XI
RATIONALE
Cranial nerve XI (spinal accessory) innervates the sternocleidomastoid
and trapezius muscles, responsible for head turning and shoulder
shrugging. CN IX and X are tested by gag reflex and voice quality,
while CN XII is assessed by tongue movement.
Question 4
A patient with a history of alcohol use disorder presents with confusion, ataxia,
and ophthalmoplegia. Which vitamin deficiency is most likely responsible for
this clinical triad?
A. Vitamin B12
B. Thiamine (B1)
C. Folate
D. Vitamin C
Correct Answer: B - Thiamine (B1)
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, RATIONALE
The triad of confusion, ataxia, and ophthalmoplegia is classic for
Wernicke encephalopathy, caused by thiamine deficiency. B12
deficiency causes subacute combined degeneration, folate deficiency
causes megaloblastic anemia, and vitamin C deficiency causes scurvy.
Question 5
When performing a focused respiratory assessment, which finding is most
consistent with consolidation?
A. Hyperresonance on percussion
B. Dullness on percussion
C. Tympany on percussion
D. Resonance on percussion
Correct Answer: B - Dullness on percussion
RATIONALE
Consolidation, as in pneumonia, increases tissue density, leading to
dullness on percussion. Hyperresonance is seen in COPD or
pneumothorax, tympany in gastric distension, and normal resonance in
healthy lung tissue.
Question 6
A patient reports a burning sensation in the epigastric area that worsens after
meals and is relieved by antacids. Which assessment finding would most
support a diagnosis of peptic ulcer disease?
A. Positive Murphy sign
B. Positive Blumberg sign
C. Epigastric tenderness on palpation
D. Rebound tenderness in the right lower quadrant
Correct Answer: C - Epigastric tenderness on palpation
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