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NSG 533 Advanced Pathophysiology Exam 2
Actual Exam 2026/2027 | Questions with
Complete Solutions | Graduate-Level Blueprint
Aligned | Pass Guaranteed - A+ Graded
SECTION 1: CARDIOVASCULAR PATHOPHYSIOLOGY (20 Questions) — 27%
Case Study 1: Heart Failure Pathophysiology
Scenario: A 68-year-old male with history of hypertension presents with progressive dyspnea on
exertion, orthopnea, and peripheral edema. Echocardiogram shows ejection fraction 35%.
Q1: In heart failure with reduced ejection fraction (HFrEF), which compensatory mechanism
initially maintains cardiac output but ultimately contributes to disease progression?
A. Activation of the renin-angiotensin-aldosterone system (RAAS) [CORRECT]
B. Decreased sympathetic nervous system activity
C. Increased atrial natriuretic peptide (ANP) secretion
D. Peripheral vasodilation
Rationale: In HFrEF, decreased cardiac output activates RAAS, causing vasoconstriction and
sodium/water retention. Initially compensatory by maintaining perfusion pressure, chronic
RAAS activation leads to maladaptive ventricular remodeling, myocardial fibrosis, and
worsening heart failure through angiotensin II-mediated cardiomyocyte hypertrophy and
aldosterone-induced collagen deposition.
Q2: The patient's elevated BNP level reflects which underlying pathophysiological process?
A. Increased ventricular wall stress and myocyte stretch [CORRECT]
B. Decreased cardiac preload
C. Reduced sympathetic tone
D. Improved renal perfusion
Rationale: B-type natriuretic peptide is synthesized and released by ventricular myocytes in
response to increased wall stress from volume expansion and pressure overload. The proBNP
,2
molecule is cleaved into active BNP and inactive NT-proBNP, serving as both diagnostic marker
and counter-regulatory hormone promoting vasodilation and natriuresis.
Q3: The patient develops pulmonary edema. What is the underlying pathophysiological
mechanism?
A. Increased left ventricular end-diastolic pressure leading to increased pulmonary capillary
hydrostatic pressure [CORRECT]
B. Decreased right ventricular output
C. Systemic vasodilation
D. Increased colloid osmotic pressure
Rationale: In left-sided heart failure, reduced left ventricular compliance and function increase
left ventricular end-diastolic pressure, which transmits backward through the left atrium into the
pulmonary venous circulation. When pulmonary capillary hydrostatic pressure exceeds 25
mmHg (Starling forces), fluid transudates into the pulmonary interstitium and alveoli, causing
impaired gas exchange and hypoxemia.
Q4: Which neurohormonal activation in HFrEF causes progressive ventricular remodeling
through myocyte hypertrophy and apoptosis?
A. Natriuretic peptide activation
B. Angiotensin II and norepinephrine [CORRECT]
C. Bradykinin accumulation
D. Nitric oxide release
Rationale: Angiotensin II, via AT1 receptors, and norepinephrine, via β-adrenergic receptors,
activate intracellular signaling pathways (MAPK, PI3K/Akt, calcineurin-NFAT) causing
myocyte hypertrophy, apoptosis, and fibroblast proliferation. This maladaptive remodeling
changes ventricular geometry from elliptical to spherical, further impairing contractile efficiency.
Q5: In contrast to HFrEF, heart failure with preserved ejection fraction (HFpEF) is characterized
by which primary pathophysiological abnormality?
A. Reduced contractility
B. Impaired ventricular relaxation and increased stiffness [CORRECT]
C. Decreased afterload
D. Reduced preload
, 3
Rationale: HFpEF (EF ≥50%) results from diastolic dysfunction—impaired active relaxation
(calcium reuptake into sarcoplasmic reticulum) and increased passive ventricular stiffness
(myocardial fibrosis, hypertrophy). This causes elevated filling pressures despite preserved
contractility, particularly during exercise when tachycardia shortens diastolic filling time.
Q6: A patient with acute coronary syndrome develops ST-elevation myocardial infarction
(STEMI). The primary pathophysiological mechanism of myocardial cell death is:
A. Reversible ischemic injury
B. Apoptosis via caspase activation
C. Coagulative necrosis due to prolonged ischemia and ATP depletion [CORRECT]
D. Autophagy
Rationale: Prolonged coronary occlusion (>20-40 minutes) causes irreversible ischemic injury
through ATP depletion, leading to loss of ion pump function, cellular edema, calcium overload,
and activation of phospholipases and proteases. This results in coagulative necrosis characterized
by preserved cellular architecture, denatured cytoplasmic proteins, and inflammatory infiltration.
Q7: Which cellular event occurs within minutes of coronary occlusion and triggers the ischemic
cascade?
A. Mitochondrial DNA damage
B. Switch from aerobic to anaerobic metabolism with rapid ATP depletion [CORRECT]
C. Nuclear chromatin condensation
D. Activation of necrosome complexes
Rationale: Myocardial ischemia immediately shifts metabolism from aerobic (mitochondrial
oxidative phosphorylation, 36 ATP/glucose) to anaerobic glycolysis (2 ATP/glucose). Rapid ATP
depletion impairs Na⁺/K⁺-ATPase and Ca²⁺-ATPase, causing cellular edema, membrane
depolarization, and calcium overload—triggering the biochemical cascade leading to cell death.
SATA Question — Myocardial Infarction Complications:
Q8: Which are potential mechanical complications of acute myocardial infarction? Select all that
apply.
A. Free wall rupture [CORRECT]
B. Ventricular septal rupture [CORRECT]
C. Papillary muscle rupture [CORRECT]
D. Pericarditis
NSG 533 Advanced Pathophysiology Exam 2
Actual Exam 2026/2027 | Questions with
Complete Solutions | Graduate-Level Blueprint
Aligned | Pass Guaranteed - A+ Graded
SECTION 1: CARDIOVASCULAR PATHOPHYSIOLOGY (20 Questions) — 27%
Case Study 1: Heart Failure Pathophysiology
Scenario: A 68-year-old male with history of hypertension presents with progressive dyspnea on
exertion, orthopnea, and peripheral edema. Echocardiogram shows ejection fraction 35%.
Q1: In heart failure with reduced ejection fraction (HFrEF), which compensatory mechanism
initially maintains cardiac output but ultimately contributes to disease progression?
A. Activation of the renin-angiotensin-aldosterone system (RAAS) [CORRECT]
B. Decreased sympathetic nervous system activity
C. Increased atrial natriuretic peptide (ANP) secretion
D. Peripheral vasodilation
Rationale: In HFrEF, decreased cardiac output activates RAAS, causing vasoconstriction and
sodium/water retention. Initially compensatory by maintaining perfusion pressure, chronic
RAAS activation leads to maladaptive ventricular remodeling, myocardial fibrosis, and
worsening heart failure through angiotensin II-mediated cardiomyocyte hypertrophy and
aldosterone-induced collagen deposition.
Q2: The patient's elevated BNP level reflects which underlying pathophysiological process?
A. Increased ventricular wall stress and myocyte stretch [CORRECT]
B. Decreased cardiac preload
C. Reduced sympathetic tone
D. Improved renal perfusion
Rationale: B-type natriuretic peptide is synthesized and released by ventricular myocytes in
response to increased wall stress from volume expansion and pressure overload. The proBNP
,2
molecule is cleaved into active BNP and inactive NT-proBNP, serving as both diagnostic marker
and counter-regulatory hormone promoting vasodilation and natriuresis.
Q3: The patient develops pulmonary edema. What is the underlying pathophysiological
mechanism?
A. Increased left ventricular end-diastolic pressure leading to increased pulmonary capillary
hydrostatic pressure [CORRECT]
B. Decreased right ventricular output
C. Systemic vasodilation
D. Increased colloid osmotic pressure
Rationale: In left-sided heart failure, reduced left ventricular compliance and function increase
left ventricular end-diastolic pressure, which transmits backward through the left atrium into the
pulmonary venous circulation. When pulmonary capillary hydrostatic pressure exceeds 25
mmHg (Starling forces), fluid transudates into the pulmonary interstitium and alveoli, causing
impaired gas exchange and hypoxemia.
Q4: Which neurohormonal activation in HFrEF causes progressive ventricular remodeling
through myocyte hypertrophy and apoptosis?
A. Natriuretic peptide activation
B. Angiotensin II and norepinephrine [CORRECT]
C. Bradykinin accumulation
D. Nitric oxide release
Rationale: Angiotensin II, via AT1 receptors, and norepinephrine, via β-adrenergic receptors,
activate intracellular signaling pathways (MAPK, PI3K/Akt, calcineurin-NFAT) causing
myocyte hypertrophy, apoptosis, and fibroblast proliferation. This maladaptive remodeling
changes ventricular geometry from elliptical to spherical, further impairing contractile efficiency.
Q5: In contrast to HFrEF, heart failure with preserved ejection fraction (HFpEF) is characterized
by which primary pathophysiological abnormality?
A. Reduced contractility
B. Impaired ventricular relaxation and increased stiffness [CORRECT]
C. Decreased afterload
D. Reduced preload
, 3
Rationale: HFpEF (EF ≥50%) results from diastolic dysfunction—impaired active relaxation
(calcium reuptake into sarcoplasmic reticulum) and increased passive ventricular stiffness
(myocardial fibrosis, hypertrophy). This causes elevated filling pressures despite preserved
contractility, particularly during exercise when tachycardia shortens diastolic filling time.
Q6: A patient with acute coronary syndrome develops ST-elevation myocardial infarction
(STEMI). The primary pathophysiological mechanism of myocardial cell death is:
A. Reversible ischemic injury
B. Apoptosis via caspase activation
C. Coagulative necrosis due to prolonged ischemia and ATP depletion [CORRECT]
D. Autophagy
Rationale: Prolonged coronary occlusion (>20-40 minutes) causes irreversible ischemic injury
through ATP depletion, leading to loss of ion pump function, cellular edema, calcium overload,
and activation of phospholipases and proteases. This results in coagulative necrosis characterized
by preserved cellular architecture, denatured cytoplasmic proteins, and inflammatory infiltration.
Q7: Which cellular event occurs within minutes of coronary occlusion and triggers the ischemic
cascade?
A. Mitochondrial DNA damage
B. Switch from aerobic to anaerobic metabolism with rapid ATP depletion [CORRECT]
C. Nuclear chromatin condensation
D. Activation of necrosome complexes
Rationale: Myocardial ischemia immediately shifts metabolism from aerobic (mitochondrial
oxidative phosphorylation, 36 ATP/glucose) to anaerobic glycolysis (2 ATP/glucose). Rapid ATP
depletion impairs Na⁺/K⁺-ATPase and Ca²⁺-ATPase, causing cellular edema, membrane
depolarization, and calcium overload—triggering the biochemical cascade leading to cell death.
SATA Question — Myocardial Infarction Complications:
Q8: Which are potential mechanical complications of acute myocardial infarction? Select all that
apply.
A. Free wall rupture [CORRECT]
B. Ventricular septal rupture [CORRECT]
C. Papillary muscle rupture [CORRECT]
D. Pericarditis
