Clinical Pathophysiology Made Ridiculously
Simple: Color Edition
3rd Edition
Author(s)Aaron Berkowitz MD PhD
TEST BANK
1)
Reference: Ch. 1: The Cardiovascular System — Left Heart
Failure / Preload and Treatment
Question Stem: A 72-year-old with chronic ischemic
cardiomyopathy presents with acute dyspnea, bibasilar crackles,
and orthopnea. Which immediate pharmacologic intervention
best reduces pulmonary congestion by rapidly decreasing
preload?
A. IV nitroprusside
B. IV loop diuretic (furosemide)
C. IV hydralazine
D. Oral ACE inhibitor
Correct Answer: B
,Rationales:
• Correct (B): IV furosemide rapidly reduces intravascular
volume and venous return (preload), relieving pulmonary
edema; it is first-line in acute decompensated left heart
failure.
• A (incorrect): Nitroprusside is a potent arterial and venous
vasodilator that lowers both afterload and preload but
poses more hypotension risk and is not first-line for
immediate diuresis.
• C (incorrect): Hydralazine primarily reduces afterload
(arterial dilation) and acts slower; it is not the best
immediate preload reducer.
• D (incorrect): Oral ACE inhibitors reduce afterload and
remodeling but act slowly and are not the acute preload-
reducing therapy.
Teaching Point: IV loop diuretics rapidly decrease preload and
relieve pulmonary congestion.
Citation: Berkowitz, 2023, Ch. 1: Left Heart Failure / Preload,
Afterload, and Treatment.
2)
Reference: Ch. 1: The Cardiovascular System — Right Heart
Failure / Kidney Involvement
,Question Stem: A patient with chronic right-sided heart failure
develops increasing peripheral edema, jugular venous
distention, and rising BUN and creatinine. Which mechanism
best explains the worsening renal function?
A. Increased renal arterial perfusion secondary to elevated
cardiac output
B. Venous congestion causing increased renal interstitial
pressure and reduced GFR
C. Primary glomerulonephritis from immune complex
deposition
D. Excess diuretic use causing prerenal azotemia only
Correct Answer: B
Rationales:
• Correct (B): Right heart failure causes systemic venous
congestion; elevated renal venous pressure increases
interstitial pressure, lowering glomerular filtration and
impairing renal function.
• A (incorrect): Cardiac output is typically reduced in
decompensated heart failure, not increased.
• C (incorrect): Immune complex glomerulonephritis is a
different primary renal disease and does not explain HF-
related congestion.
• D (incorrect): Diuretics can contribute to prerenal
azotemia, but venous congestion is the primary
mechanism in right HF with JVD and edema.
, Teaching Point: Venous congestion from right HF raises renal
interstitial pressure and lowers GFR.
Citation: Berkowitz, 2023, Ch. 1: The Kidneys in Heart Failure.
3)
Reference: Ch. 1: The Cardiovascular System — Aortic Stenosis /
Murmur and Hemodynamics
Question Stem: An 81-year-old man with severe aortic stenosis
(AS) complains of exertional syncope and angina. Which
statement best explains why aggressive vasodilation (e.g., high-
dose nitrates) can precipitate syncope in severe AS?
A. Vasodilation reduces afterload causing abrupt hypertension.
B. Vasodilation increases heart rate, worsening ischemia.
C. Vasodilation decreases preload and coronary perfusion
pressure, causing hypotension and cerebral hypoperfusion.
D. Vasodilation directly causes mechanical obstruction at the
valve.
Correct Answer: C
Rationales:
• Correct (C): In severe AS the left ventricle depends on
preload to maintain stroke volume; vasodilation decreases
venous return and systemic pressure, lowering coronary
and cerebral perfusion and precipitating syncope.
Simple: Color Edition
3rd Edition
Author(s)Aaron Berkowitz MD PhD
TEST BANK
1)
Reference: Ch. 1: The Cardiovascular System — Left Heart
Failure / Preload and Treatment
Question Stem: A 72-year-old with chronic ischemic
cardiomyopathy presents with acute dyspnea, bibasilar crackles,
and orthopnea. Which immediate pharmacologic intervention
best reduces pulmonary congestion by rapidly decreasing
preload?
A. IV nitroprusside
B. IV loop diuretic (furosemide)
C. IV hydralazine
D. Oral ACE inhibitor
Correct Answer: B
,Rationales:
• Correct (B): IV furosemide rapidly reduces intravascular
volume and venous return (preload), relieving pulmonary
edema; it is first-line in acute decompensated left heart
failure.
• A (incorrect): Nitroprusside is a potent arterial and venous
vasodilator that lowers both afterload and preload but
poses more hypotension risk and is not first-line for
immediate diuresis.
• C (incorrect): Hydralazine primarily reduces afterload
(arterial dilation) and acts slower; it is not the best
immediate preload reducer.
• D (incorrect): Oral ACE inhibitors reduce afterload and
remodeling but act slowly and are not the acute preload-
reducing therapy.
Teaching Point: IV loop diuretics rapidly decrease preload and
relieve pulmonary congestion.
Citation: Berkowitz, 2023, Ch. 1: Left Heart Failure / Preload,
Afterload, and Treatment.
2)
Reference: Ch. 1: The Cardiovascular System — Right Heart
Failure / Kidney Involvement
,Question Stem: A patient with chronic right-sided heart failure
develops increasing peripheral edema, jugular venous
distention, and rising BUN and creatinine. Which mechanism
best explains the worsening renal function?
A. Increased renal arterial perfusion secondary to elevated
cardiac output
B. Venous congestion causing increased renal interstitial
pressure and reduced GFR
C. Primary glomerulonephritis from immune complex
deposition
D. Excess diuretic use causing prerenal azotemia only
Correct Answer: B
Rationales:
• Correct (B): Right heart failure causes systemic venous
congestion; elevated renal venous pressure increases
interstitial pressure, lowering glomerular filtration and
impairing renal function.
• A (incorrect): Cardiac output is typically reduced in
decompensated heart failure, not increased.
• C (incorrect): Immune complex glomerulonephritis is a
different primary renal disease and does not explain HF-
related congestion.
• D (incorrect): Diuretics can contribute to prerenal
azotemia, but venous congestion is the primary
mechanism in right HF with JVD and edema.
, Teaching Point: Venous congestion from right HF raises renal
interstitial pressure and lowers GFR.
Citation: Berkowitz, 2023, Ch. 1: The Kidneys in Heart Failure.
3)
Reference: Ch. 1: The Cardiovascular System — Aortic Stenosis /
Murmur and Hemodynamics
Question Stem: An 81-year-old man with severe aortic stenosis
(AS) complains of exertional syncope and angina. Which
statement best explains why aggressive vasodilation (e.g., high-
dose nitrates) can precipitate syncope in severe AS?
A. Vasodilation reduces afterload causing abrupt hypertension.
B. Vasodilation increases heart rate, worsening ischemia.
C. Vasodilation decreases preload and coronary perfusion
pressure, causing hypotension and cerebral hypoperfusion.
D. Vasodilation directly causes mechanical obstruction at the
valve.
Correct Answer: C
Rationales:
• Correct (C): In severe AS the left ventricle depends on
preload to maintain stroke volume; vasodilation decreases
venous return and systemic pressure, lowering coronary
and cerebral perfusion and precipitating syncope.
