Clinical Pathophysiology Made Ridiculously
Simple: Color Edition
3rd Edition
Author(s)Aaron Berkowitz MD PhD
TEST BANK
1.
Reference: Ch. 1 — Heart Failure: Left Heart Failure / Symptoms
and Signs of Heart Failure
Question Stem:
A 72-year-old woman with a history of ischemic
cardiomyopathy reports progressive shortness of breath,
orthopnea (needs three pillows), and productive frothy sputum.
On exam she has bibasilar crackles and an audible S3. Which
physiologic mechanism best explains the presence of an S3 in
this patient?
,A. Increased afterload causing delayed ventricular ejection
B. Rapid passive filling of a dilated, noncompliant left ventricle
C. Turbulent flow across a stenotic mitral valve during systole
D. Early closure of the aortic valve from decreased LV preload
Correct Answer: B
Rationale — Correct (B):
An S3 is produced by rapid passive filling of a dilated or volume-
overloaded left ventricle (LV) — typical of systolic
dysfunction/left-sided heart failure causing increased LV end-
diastolic volume and noncompliance. This fits the patient’s
orthopnea and crackles indicating pulmonary congestion.
Rationale — Incorrect:
A: Afterload-related problems usually produce an S4 (stiff
ventricle) or systolic murmur, not S3.
C: Mitral stenosis causes diastolic murmur and an opening snap
— not an S3 from systolic filling.
D: Early aortic valve closure relates to severe aortic
regurgitation or abrupt hemodynamic changes, not an S3 from
rapid filling.
Teaching Point:
S3 = rapid filling of a dilated LV; indicates volume
overload/systolic dysfunction.
Citation:
Berkowitz, 2023, Ch. 1: Left Heart Failure — Symptoms and
Signs of Heart Failure
,2.
Reference: Ch. 1 — Preload, Afterload, and Treatment of Heart
Failure
Question Stem:
A patient with acute pulmonary edema is given IV nitroglycerin
in the ED. Which immediate hemodynamic effect explains
nitroglycerin’s rapid symptomatic benefit?
A. Increased venous return and preload
B. Arteriolar dilation reducing afterload
C. Venodilation reducing preload and pulmonary congestion
D. Increased heart rate improving cardiac output
Correct Answer: C
Rationale — Correct (C):
IV nitroglycerin causes venodilation, decreasing venous return
(preload) which reduces left ventricular end-diastolic pressure
and pulmonary capillary hydrostatic pressure — rapidly
improving pulmonary edema and dyspnea.
Rationale — Incorrect:
A: Nitroglycerin decreases, not increases, preload.
B: While high doses may reduce afterload, its immediate benefit
in pulmonary edema is primarily venodilation.
D: Nitroglycerin does not primarily increase heart rate to
improve cardiac output; tachycardia could be adverse.
, Teaching Point:
Venodilation (↓preload) reduces pulmonary congestion in
acute left-sided failure.
Citation:
Berkowitz, 2023, Ch. 1: Preload, Afterload, and Treatment of
Heart Failure
3.
Reference: Ch. 1 — The Kidneys in Heart Failure
Question Stem:
A patient with chronic heart failure has worsening azotemia and
weight gain despite diuretics. The nurse recognizes activation of
which compensatory mechanism is most responsible for renal
sodium retention in heart failure?
A. Natriuretic peptide release from atria
B. Sympathetic nervous system suppression
C. Renin–angiotensin–aldosterone system (RAAS) activation
D. Increased glomerular filtration from higher renal perfusion
Correct Answer: C
Rationale — Correct (C):
Low effective arterial perfusion in heart failure triggers RAAS
activation → increased aldosterone → sodium and water
retention, worsening volume overload and congestion. This
explains diuretic resistance and weight gain.
Simple: Color Edition
3rd Edition
Author(s)Aaron Berkowitz MD PhD
TEST BANK
1.
Reference: Ch. 1 — Heart Failure: Left Heart Failure / Symptoms
and Signs of Heart Failure
Question Stem:
A 72-year-old woman with a history of ischemic
cardiomyopathy reports progressive shortness of breath,
orthopnea (needs three pillows), and productive frothy sputum.
On exam she has bibasilar crackles and an audible S3. Which
physiologic mechanism best explains the presence of an S3 in
this patient?
,A. Increased afterload causing delayed ventricular ejection
B. Rapid passive filling of a dilated, noncompliant left ventricle
C. Turbulent flow across a stenotic mitral valve during systole
D. Early closure of the aortic valve from decreased LV preload
Correct Answer: B
Rationale — Correct (B):
An S3 is produced by rapid passive filling of a dilated or volume-
overloaded left ventricle (LV) — typical of systolic
dysfunction/left-sided heart failure causing increased LV end-
diastolic volume and noncompliance. This fits the patient’s
orthopnea and crackles indicating pulmonary congestion.
Rationale — Incorrect:
A: Afterload-related problems usually produce an S4 (stiff
ventricle) or systolic murmur, not S3.
C: Mitral stenosis causes diastolic murmur and an opening snap
— not an S3 from systolic filling.
D: Early aortic valve closure relates to severe aortic
regurgitation or abrupt hemodynamic changes, not an S3 from
rapid filling.
Teaching Point:
S3 = rapid filling of a dilated LV; indicates volume
overload/systolic dysfunction.
Citation:
Berkowitz, 2023, Ch. 1: Left Heart Failure — Symptoms and
Signs of Heart Failure
,2.
Reference: Ch. 1 — Preload, Afterload, and Treatment of Heart
Failure
Question Stem:
A patient with acute pulmonary edema is given IV nitroglycerin
in the ED. Which immediate hemodynamic effect explains
nitroglycerin’s rapid symptomatic benefit?
A. Increased venous return and preload
B. Arteriolar dilation reducing afterload
C. Venodilation reducing preload and pulmonary congestion
D. Increased heart rate improving cardiac output
Correct Answer: C
Rationale — Correct (C):
IV nitroglycerin causes venodilation, decreasing venous return
(preload) which reduces left ventricular end-diastolic pressure
and pulmonary capillary hydrostatic pressure — rapidly
improving pulmonary edema and dyspnea.
Rationale — Incorrect:
A: Nitroglycerin decreases, not increases, preload.
B: While high doses may reduce afterload, its immediate benefit
in pulmonary edema is primarily venodilation.
D: Nitroglycerin does not primarily increase heart rate to
improve cardiac output; tachycardia could be adverse.
, Teaching Point:
Venodilation (↓preload) reduces pulmonary congestion in
acute left-sided failure.
Citation:
Berkowitz, 2023, Ch. 1: Preload, Afterload, and Treatment of
Heart Failure
3.
Reference: Ch. 1 — The Kidneys in Heart Failure
Question Stem:
A patient with chronic heart failure has worsening azotemia and
weight gain despite diuretics. The nurse recognizes activation of
which compensatory mechanism is most responsible for renal
sodium retention in heart failure?
A. Natriuretic peptide release from atria
B. Sympathetic nervous system suppression
C. Renin–angiotensin–aldosterone system (RAAS) activation
D. Increased glomerular filtration from higher renal perfusion
Correct Answer: C
Rationale — Correct (C):
Low effective arterial perfusion in heart failure triggers RAAS
activation → increased aldosterone → sodium and water
retention, worsening volume overload and congestion. This
explains diuretic resistance and weight gain.
