MARYVILLE NURS 620 EXAM 3 ACTUAL EXAM 2026/2027 |
Complete Solution with A+ Guide | Graduate-Level Nursing
Review | Verified Answers | Pass Guaranteed - A+ Graded
Assessment Overview: This comprehensive exam review evaluates mastery of
advanced pathophysiology concepts at the graduate nursing level, aligned with
Maryville University's competency-based curriculum and advanced practice nursing
standards. The assessment contains 100 questions emphasizing application (50%),
analysis (30%), synthesis (15%), and recall (5%).
Unit 1: Cardiovascular Pathophysiology and Advanced Clinical Management
(25 Questions)
Q1: Heart Failure Pathophysiology - Neurohormonal Activation
Clinical Scenario: A 68-year-old male with chronic heart failure (HFrEF, EF 35%) presents
with worsening dyspnea and peripheral edema. Laboratory studies reveal elevated BNP
and creatinine. Which neurohormonal pathway activation is primarily responsible for the
progressive ventricular remodeling and disease progression in this patient?
A. Parasympathetic nervous system inhibition with decreased acetylcholine release
B. Activation of the renin-angiotensin-aldosterone system (RAAS) and sympathetic
nervous system [CORRECT]
,C. Increased natriuretic peptide secretion with resultant vasodilation
D. Enhanced nitric oxide synthesis and endothelial relaxation
Correct Answer: B
Rationale: Graduate-Level Pathophysiology Analysis:
In HFrEF (Heart Failure with reduced Ejection Fraction), the fundamental
pathophysiological driver is neurohormonal activation:
RAAS Activation:
● Reduced renal perfusion → renin release → angiotensin II formation
● Angiotensin II: Vasoconstriction, aldosterone secretion, myocardial fibrosis,
norepinephrine release
● Aldosterone: Sodium/water retention, myocardial collagen deposition,
endothelial dysfunction
Sympathetic Nervous System Activation:
● Baroreceptor unloading triggers norepinephrine release
● Initial compensatory increase in contractility and heart rate
● Chronic exposure: Myocyte apoptosis, arrhythmogenesis, β-receptor
downregulation, progressive remodeling
Ventricular Remodeling: Eccentric hypertrophy → progressive dilation, wall thinning,
spherical geometry change → worsening EF.
Why other options are incorrect:
, ● A: Parasympathetic tone is actually reduced in HF (autonomic imbalance), not
the primary driver
● C: Natriuretic peptides are compensatory (BNP elevation reflects wall stress), not
causative of remodeling
● D: NO synthesis is impaired in HF (endothelial dysfunction), not enhanced
Advanced Practice Application: This understanding guides GDMT (Guideline-Directed
Medical Therapy) targeting RAAS (ACE-I/ARB/ARNI) and sympathetic blockade
(β-blockers).
Q2: Acute Coronary Syndrome - Plaque Pathophysiology
Clinical Scenario: A 55-year-old female with type 2 diabetes and hyperlipidemia
experiences sudden onset chest pain with ST-elevation in leads V1-V4. Autopsy would
most likely reveal which pathological finding in the culprit artery?
A. Stable fibrous plaque with >90% luminal stenosis and gradual occlusion
B. Ruptured lipid-rich plaque with superimposed thrombus formation [CORRECT]
C. Calcified nodule protruding into the lumen without thrombus
D. Vasospastic disorder with minimal atherosclerotic burden
Correct Answer: B
Rationale: Acute Coronary Syndrome Pathophysiology:
, STEMI Mechanism: Acute plaque rupture or erosion with thrombotic occlusion
Vulnerable Plaque Characteristics:
● Thin fibrous cap (<65 μm)
● Large lipid core (>40% plaque volume)
● Increased inflammatory cells (macrophages, T-lymphocytes)
● Reduced smooth muscle cells
● Neovascularization and intra-plaque hemorrhage
Plaque Rupture Triggers:
● Shear stress at shoulder regions
● Matrix metalloproteinase activation (collagen degradation)
● Tissue factor exposure → thrombin generation → platelet activation
Thrombosis: Superimposed clot converts chronic stable lesion to acute total occlusion.
Why other options are incorrect:
● A: Describes stable angina pathophysiology; STEMI requires acute plaque event
● C: Calcified nodules cause gradual stenosis or calcific emboli, not typical STEMI
● D: Variant angina (Prinzmetal) causes vasospasm but represents minority of ACS
cases; this patient has risk factors for atherosclerotic disease
Advanced Practice Application: Understanding plaque vulnerability explains why
revascularization timing, antiplatelet therapy (DAPT), and statin intensity are critical in
ACS management.
Complete Solution with A+ Guide | Graduate-Level Nursing
Review | Verified Answers | Pass Guaranteed - A+ Graded
Assessment Overview: This comprehensive exam review evaluates mastery of
advanced pathophysiology concepts at the graduate nursing level, aligned with
Maryville University's competency-based curriculum and advanced practice nursing
standards. The assessment contains 100 questions emphasizing application (50%),
analysis (30%), synthesis (15%), and recall (5%).
Unit 1: Cardiovascular Pathophysiology and Advanced Clinical Management
(25 Questions)
Q1: Heart Failure Pathophysiology - Neurohormonal Activation
Clinical Scenario: A 68-year-old male with chronic heart failure (HFrEF, EF 35%) presents
with worsening dyspnea and peripheral edema. Laboratory studies reveal elevated BNP
and creatinine. Which neurohormonal pathway activation is primarily responsible for the
progressive ventricular remodeling and disease progression in this patient?
A. Parasympathetic nervous system inhibition with decreased acetylcholine release
B. Activation of the renin-angiotensin-aldosterone system (RAAS) and sympathetic
nervous system [CORRECT]
,C. Increased natriuretic peptide secretion with resultant vasodilation
D. Enhanced nitric oxide synthesis and endothelial relaxation
Correct Answer: B
Rationale: Graduate-Level Pathophysiology Analysis:
In HFrEF (Heart Failure with reduced Ejection Fraction), the fundamental
pathophysiological driver is neurohormonal activation:
RAAS Activation:
● Reduced renal perfusion → renin release → angiotensin II formation
● Angiotensin II: Vasoconstriction, aldosterone secretion, myocardial fibrosis,
norepinephrine release
● Aldosterone: Sodium/water retention, myocardial collagen deposition,
endothelial dysfunction
Sympathetic Nervous System Activation:
● Baroreceptor unloading triggers norepinephrine release
● Initial compensatory increase in contractility and heart rate
● Chronic exposure: Myocyte apoptosis, arrhythmogenesis, β-receptor
downregulation, progressive remodeling
Ventricular Remodeling: Eccentric hypertrophy → progressive dilation, wall thinning,
spherical geometry change → worsening EF.
Why other options are incorrect:
, ● A: Parasympathetic tone is actually reduced in HF (autonomic imbalance), not
the primary driver
● C: Natriuretic peptides are compensatory (BNP elevation reflects wall stress), not
causative of remodeling
● D: NO synthesis is impaired in HF (endothelial dysfunction), not enhanced
Advanced Practice Application: This understanding guides GDMT (Guideline-Directed
Medical Therapy) targeting RAAS (ACE-I/ARB/ARNI) and sympathetic blockade
(β-blockers).
Q2: Acute Coronary Syndrome - Plaque Pathophysiology
Clinical Scenario: A 55-year-old female with type 2 diabetes and hyperlipidemia
experiences sudden onset chest pain with ST-elevation in leads V1-V4. Autopsy would
most likely reveal which pathological finding in the culprit artery?
A. Stable fibrous plaque with >90% luminal stenosis and gradual occlusion
B. Ruptured lipid-rich plaque with superimposed thrombus formation [CORRECT]
C. Calcified nodule protruding into the lumen without thrombus
D. Vasospastic disorder with minimal atherosclerotic burden
Correct Answer: B
Rationale: Acute Coronary Syndrome Pathophysiology:
, STEMI Mechanism: Acute plaque rupture or erosion with thrombotic occlusion
Vulnerable Plaque Characteristics:
● Thin fibrous cap (<65 μm)
● Large lipid core (>40% plaque volume)
● Increased inflammatory cells (macrophages, T-lymphocytes)
● Reduced smooth muscle cells
● Neovascularization and intra-plaque hemorrhage
Plaque Rupture Triggers:
● Shear stress at shoulder regions
● Matrix metalloproteinase activation (collagen degradation)
● Tissue factor exposure → thrombin generation → platelet activation
Thrombosis: Superimposed clot converts chronic stable lesion to acute total occlusion.
Why other options are incorrect:
● A: Describes stable angina pathophysiology; STEMI requires acute plaque event
● C: Calcified nodules cause gradual stenosis or calcific emboli, not typical STEMI
● D: Variant angina (Prinzmetal) causes vasospasm but represents minority of ACS
cases; this patient has risk factors for atherosclerotic disease
Advanced Practice Application: Understanding plaque vulnerability explains why
revascularization timing, antiplatelet therapy (DAPT), and statin intensity are critical in
ACS management.
