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APPLIED PATHOPHYSIOLOGY FOR THE ADVANCED
PRACTICE TEST BANK 2025-2026 170+ QUESTIONS WITH
ANSWERS & RATIONALES,100% CORRECT ALREADY GRADED
A+
Question 1
A 62-year-old man with a history of hypertension, type 2 diabetes, and a 40
pack-year smoking history presents with 30 minutes of severe, central
crushing chest pain radiating to his left arm and diaphoresis. On arrival his
blood pressure is 100/60 mmHg and pulse 96 bpm. ECG demonstrates 3-mm
ST-segment elevation in leads V2–V4 and reciprocal ST depression in II, III,
and aVF. Initial high-sensitivity troponin I is markedly elevated. Which
artery is most likely occluded?
A. Right coronary artery
B. Left circumflex artery
C. Left anterior descending artery
D. Posterior descending artery
Correct answer: C. Left anterior descending artery
Rationale: The ECG pattern of ST-elevation predominantly in the anterior
precordial leads V2–V4 localizes the infarction to the anterior wall of the
left ventricle, which is supplied by the left anterior descending (LAD) artery;
the history of classic ischemic chest pain and elevated troponin confirm
myocardial necrosis. LAD occlusions commonly produce large anterior MIs
with reciprocal changes inferiorly, matching this tracing. The right coronary
artery and posterior descending artery more typically cause inferior or
posterior infarctions (II, III, aVF or V7–V9), while the left circumflex artery
most often affects lateral leads (I, aVL, V5–V6); therefore those options are
inconsistent with the lead distribution shown here.
Question 2
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Which pathophysiologic process is the central driver of progressive
atherosclerotic plaque formation in medium and large arteries?
A. Autoimmune T-cell attack on endothelium
B. Endothelial injury with lipid infiltration and chronic inflammation
C. Viral infection of vascular smooth muscle cells
D. Acute neutrophilic infiltration only
Correct answer: B. Endothelial injury with lipid infiltration and chronic
inflammation
Rationale: Atherosclerosis is initiated by endothelial dysfunction (from
hypertension, smoking, hyperlipidemia, diabetes) that increases permeability
and allows LDL particles to enter the intima where they become oxidized;
oxidized LDL is taken up by macrophages to form foam cells and stimulates
chronic inflammatory signaling and smooth muscle migration/proliferation,
producing the fatty streak and, over time, a fibrous plaque that narrows the
lumen or ruptures. While T-cells and adaptive immunity participate, they are
part of the chronic inflammatory milieu rather than the primary initiating
step; viral infection of smooth muscle and isolated acute neutrophilic
inflammation are not the paradigmatic mechanisms of stable atherosclerotic
plaque development.
Question 3
A 70-year-old man suffers a large anterior myocardial infarction and within
hours develops hypotension, cool clammy skin, oliguria, and altered mental
status. A pulmonary artery catheter shows cardiac index 1.8 L/min/m² (low)
and systemic vascular resistance markedly elevated. Which hemodynamic
pattern best fits cardiogenic shock in this patient?
A. High cardiac output, low SVR
B. Low cardiac output, high SVR
C. High cardiac output, high SVR
D. Low cardiac output, low SVR
Correct answer: B. Low cardiac output, high systemic vascular
resistance (SVR)
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Rationale: Cardiogenic shock results from pump failure (severely reduced
stroke volume and cardiac output) due to extensive myocardial damage; the
body mounts a compensatory sympathetic vasoconstrictive response to
maintain perfusion pressure, producing elevated systemic vascular resistance
— a pattern that further increases afterload and can worsen cardiac output.
High cardiac output with low SVR is characteristic of distributive shock
(e.g., septic shock), and low cardiac output with low SVR would be rare and
more compatible with late-stage distributive shock or mixed shock states,
making those alternatives inconsistent with classic post-MI cardiogenic
shock physiology.
Question 4
A 58-year-old woman on chronic diuretics and a macrolide antibiotic for
community-acquired pneumonia becomes lightheaded and has palpitations.
ECG shows a markedly prolonged QT interval and an episode of
polymorphic ventricular tachycardia consistent with torsades de pointes.
Which electrolyte abnormality is most commonly implicated in precipitating
torsades?
A. Hyperkalemia
B. Hypocalcemia
C. Hypomagnesemia
D. Hypernatremia
Correct answer: C. Hypomagnesemia
Rationale: Hypomagnesemia predisposes to QT prolongation and torsades
de pointes by altering ion channel behavior and facilitating early
afterdepolarizations; it often occurs with diuretic use, concurrent QT-
prolonging drugs (macrolides), or low potassium states. Hyperkalemia
classically shortens the QT and produces peaked T waves and wide QRS
complexes rather than torsades; hypocalcemia can prolong QT but is a less
common direct trigger for torsades compared with low magnesium; sodium
derangements do not directly precipitate torsades in the way magnesium
deficiency does.
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Question 5
A 68-year-old woman with long-standing hypertension and obesity reports
exertional dyspnea and orthopnea. Echocardiography reveals a left
ventricular ejection fraction of 58% with concentric LV hypertrophy and
elevated filling pressures. Which mechanism best explains her heart failure
symptoms?
A. Impaired systolic contraction (reduced ejection fraction)
B. Impaired myocardial relaxation and increased ventricular stiffness
(diastolic dysfunction)
C. Volume overload with eccentric hypertrophy only
D. Acute severe mitral regurgitation
Correct answer: B. Impaired myocardial relaxation and increased
ventricular stiffness (diastolic dysfunction)
Rationale: Heart failure with preserved ejection fraction (HFpEF) is
characterized by preserved global systolic function (normal EF) but impaired
diastolic filling due to increased myocardial stiffness and reduced relaxation,
commonly from long-standing hypertension and concentric hypertrophy; this
leads to elevated left-sided filling pressures, pulmonary congestion, and
symptomatic heart failure despite normal EF. Systolic impairment with
reduced EF describes HFrEF (option A), eccentric hypertrophy from volume
overload (option C) is a different remodeling response, and acute MR
(option D) causes sudden volume overload and acute pulmonary edema
rather than the chronic diastolic dysfunction pattern seen here.
Question 6
A 34-year-old previously healthy woman develops the “worst headache of
her life” that reached maximal intensity within seconds, associated with neck
stiffness and photophobia. Non-contrast head CT shows subarachnoid blood
in the basal cisterns. What is the most likely cause of spontaneous
subarachnoid hemorrhage in an adult of this age?
APPLIED PATHOPHYSIOLOGY FOR THE ADVANCED
PRACTICE TEST BANK 2025-2026 170+ QUESTIONS WITH
ANSWERS & RATIONALES,100% CORRECT ALREADY GRADED
A+
Question 1
A 62-year-old man with a history of hypertension, type 2 diabetes, and a 40
pack-year smoking history presents with 30 minutes of severe, central
crushing chest pain radiating to his left arm and diaphoresis. On arrival his
blood pressure is 100/60 mmHg and pulse 96 bpm. ECG demonstrates 3-mm
ST-segment elevation in leads V2–V4 and reciprocal ST depression in II, III,
and aVF. Initial high-sensitivity troponin I is markedly elevated. Which
artery is most likely occluded?
A. Right coronary artery
B. Left circumflex artery
C. Left anterior descending artery
D. Posterior descending artery
Correct answer: C. Left anterior descending artery
Rationale: The ECG pattern of ST-elevation predominantly in the anterior
precordial leads V2–V4 localizes the infarction to the anterior wall of the
left ventricle, which is supplied by the left anterior descending (LAD) artery;
the history of classic ischemic chest pain and elevated troponin confirm
myocardial necrosis. LAD occlusions commonly produce large anterior MIs
with reciprocal changes inferiorly, matching this tracing. The right coronary
artery and posterior descending artery more typically cause inferior or
posterior infarctions (II, III, aVF or V7–V9), while the left circumflex artery
most often affects lateral leads (I, aVL, V5–V6); therefore those options are
inconsistent with the lead distribution shown here.
Question 2
,2|Page
Which pathophysiologic process is the central driver of progressive
atherosclerotic plaque formation in medium and large arteries?
A. Autoimmune T-cell attack on endothelium
B. Endothelial injury with lipid infiltration and chronic inflammation
C. Viral infection of vascular smooth muscle cells
D. Acute neutrophilic infiltration only
Correct answer: B. Endothelial injury with lipid infiltration and chronic
inflammation
Rationale: Atherosclerosis is initiated by endothelial dysfunction (from
hypertension, smoking, hyperlipidemia, diabetes) that increases permeability
and allows LDL particles to enter the intima where they become oxidized;
oxidized LDL is taken up by macrophages to form foam cells and stimulates
chronic inflammatory signaling and smooth muscle migration/proliferation,
producing the fatty streak and, over time, a fibrous plaque that narrows the
lumen or ruptures. While T-cells and adaptive immunity participate, they are
part of the chronic inflammatory milieu rather than the primary initiating
step; viral infection of smooth muscle and isolated acute neutrophilic
inflammation are not the paradigmatic mechanisms of stable atherosclerotic
plaque development.
Question 3
A 70-year-old man suffers a large anterior myocardial infarction and within
hours develops hypotension, cool clammy skin, oliguria, and altered mental
status. A pulmonary artery catheter shows cardiac index 1.8 L/min/m² (low)
and systemic vascular resistance markedly elevated. Which hemodynamic
pattern best fits cardiogenic shock in this patient?
A. High cardiac output, low SVR
B. Low cardiac output, high SVR
C. High cardiac output, high SVR
D. Low cardiac output, low SVR
Correct answer: B. Low cardiac output, high systemic vascular
resistance (SVR)
,3|Page
Rationale: Cardiogenic shock results from pump failure (severely reduced
stroke volume and cardiac output) due to extensive myocardial damage; the
body mounts a compensatory sympathetic vasoconstrictive response to
maintain perfusion pressure, producing elevated systemic vascular resistance
— a pattern that further increases afterload and can worsen cardiac output.
High cardiac output with low SVR is characteristic of distributive shock
(e.g., septic shock), and low cardiac output with low SVR would be rare and
more compatible with late-stage distributive shock or mixed shock states,
making those alternatives inconsistent with classic post-MI cardiogenic
shock physiology.
Question 4
A 58-year-old woman on chronic diuretics and a macrolide antibiotic for
community-acquired pneumonia becomes lightheaded and has palpitations.
ECG shows a markedly prolonged QT interval and an episode of
polymorphic ventricular tachycardia consistent with torsades de pointes.
Which electrolyte abnormality is most commonly implicated in precipitating
torsades?
A. Hyperkalemia
B. Hypocalcemia
C. Hypomagnesemia
D. Hypernatremia
Correct answer: C. Hypomagnesemia
Rationale: Hypomagnesemia predisposes to QT prolongation and torsades
de pointes by altering ion channel behavior and facilitating early
afterdepolarizations; it often occurs with diuretic use, concurrent QT-
prolonging drugs (macrolides), or low potassium states. Hyperkalemia
classically shortens the QT and produces peaked T waves and wide QRS
complexes rather than torsades; hypocalcemia can prolong QT but is a less
common direct trigger for torsades compared with low magnesium; sodium
derangements do not directly precipitate torsades in the way magnesium
deficiency does.
, 4|Page
Question 5
A 68-year-old woman with long-standing hypertension and obesity reports
exertional dyspnea and orthopnea. Echocardiography reveals a left
ventricular ejection fraction of 58% with concentric LV hypertrophy and
elevated filling pressures. Which mechanism best explains her heart failure
symptoms?
A. Impaired systolic contraction (reduced ejection fraction)
B. Impaired myocardial relaxation and increased ventricular stiffness
(diastolic dysfunction)
C. Volume overload with eccentric hypertrophy only
D. Acute severe mitral regurgitation
Correct answer: B. Impaired myocardial relaxation and increased
ventricular stiffness (diastolic dysfunction)
Rationale: Heart failure with preserved ejection fraction (HFpEF) is
characterized by preserved global systolic function (normal EF) but impaired
diastolic filling due to increased myocardial stiffness and reduced relaxation,
commonly from long-standing hypertension and concentric hypertrophy; this
leads to elevated left-sided filling pressures, pulmonary congestion, and
symptomatic heart failure despite normal EF. Systolic impairment with
reduced EF describes HFrEF (option A), eccentric hypertrophy from volume
overload (option C) is a different remodeling response, and acute MR
(option D) causes sudden volume overload and acute pulmonary edema
rather than the chronic diastolic dysfunction pattern seen here.
Question 6
A 34-year-old previously healthy woman develops the “worst headache of
her life” that reached maximal intensity within seconds, associated with neck
stiffness and photophobia. Non-contrast head CT shows subarachnoid blood
in the basal cisterns. What is the most likely cause of spontaneous
subarachnoid hemorrhage in an adult of this age?
