NSG 3850 Pathophysiology 2:
Comprehensive Exam 2Integrated
Systems & Advanced Pathophysiology
WITH CORRECT ANSWERS WELL VERIFIED
AND IN-DEPTH RATIONALES.
Section 1: Cardiovascular Pathophysiology (Questions 1-30)
1. A patient with chronic hypertension presents with shortness of breath and peripheral
edema. Which of the following best describes the underlying pathophysiological
process leading to these symptoms?
A. Decreased systemic vascular resistance
B. Left ventricular hypertrophy with subsequent heart failure
C. Right ventricular failure due to pulmonary embolism
D. Increased cardiac output from sympathetic stimulation
CORRECT ANSWER: B
Rationale: Chronic hypertension increases afterload, forcing the left ventricle to work
harder, leading to left ventricular hypertrophy (LVH). Over time, LVH leads to diastolic
and eventually systolic dysfunction, resulting in left-sided heart failure. This causes a
backup of blood into the pulmonary circulation (leading to shortness of breath) and, if
prolonged, can lead to right-sided failure and peripheral edema.
2. A myocardial infarction (MI) most commonly results from which of the following?
A. Vasospasm of a coronary artery
B. Rupture of an atherosclerotic plaque with subsequent thrombus formation
C. Embolism from a left ventricular thrombus
,D. Severe anemia leading to hypoxic injury
CORRECT ANSWER: B
Rationale: The most common cause of an MI is the rupture or erosion of a vulnerable
atherosclerotic plaque. This exposes the underlying collagen and tissue factor, leading
to platelet aggregation and thrombus formation that completely occludes the
coronary artery, causing ischemic necrosis of the myocardium.
3. The Frank-Starling law of the heart states that:
A. Cardiac output is directly proportional to afterload.
B. Stroke volume increases in response to an increase in preload.
C. Heart rate is inversely proportional to blood pressure.
D. Contractility decreases with increased venous return.
CORRECT ANSWER: B
Rationale: The Frank-Starling mechanism describes the intrinsic ability of the heart to
adapt to increased venous return. Increased preload (end-diastolic volume) stretches
the myocardial fibers, leading to a more forceful contraction and increased stroke
volume.
4. A patient is diagnosed with Left-Sided Heart Failure. Which of the following signs is
most characteristic of this condition?
A. Jugular venous distension
B. Hepatomegaly
C. Peripheral pitting edema
D. Pulmonary crackles (rales)
CORRECT ANSWER: D
Rationale: Left-sided heart failure results in an inability to pump blood forward, leading
to a backup of blood into the pulmonary circulation. This increases pulmonary capillary
hydrostatic pressure, causing fluid to leak into the interstitial spaces and alveoli, resulting
in pulmonary congestion, crackles, and dyspnea.
,5. In cardiogenic shock, the primary pathophysiological derangement is:
A. Hypovolemia due to massive bleeding
B. Systemic vasodilation causing hypotension
C. Failure of the heart to pump adequately
D. Obstruction of blood flow by a pulmonary embolism
CORRECT ANSWER: C
Rationale: Cardiogenic shock is a form of circulatory shock caused by the heart's
inability to maintain adequate cardiac output despite adequate intravascular volume.
This is most commonly due to a severe MI, leading to pump failure.
6. A patient with an abdominal aortic aneurysm (AAA) is at greatest risk for which acute
complication?
A. Embolization to the lower extremities
B. Dissection into the renal arteries
C. Rupture leading to hemorrhagic shock
D. Compression of the inferior vena cava
CORRECT ANSWER: C
Rationale: The most life-threatening complication of an AAA is rupture, which results in
massive intra-abdominal bleeding and rapid progression to hypovolemic shock. While
other complications can occur, rupture is the primary cause of mortality.
7. Aortic regurgitation (aortic insufficiency) results in:
A. Increased afterload on the right ventricle
B. A "water-hammer" pulse and volume overload of the left ventricle
C. A fixed, low cardiac output state
D. A holosystolic murmur heard at the apex
, CORRECT ANSWER: B
Rationale: In aortic regurgitation, blood leaks backward from the aorta into the left
ventricle during diastole. This causes volume overload of the left ventricle, which dilates
and hypertrophies. The increased stroke volume and rapid runoff of blood into the LV
during diastole produce a "water-hammer" (bounding) pulse.
8. Pericarditis is associated with which of the following ECG findings?
A. Pathologic Q waves
B. ST-segment elevation in a diffuse pattern
C. Depressed ST-segment in leads V1-V3
D. Prolonged PR interval
CORRECT ANSWER: B
Rationale: Pericarditis involves inflammation of the pericardial sac. The classic ECG
finding is diffuse, concave-upward ST-segment elevation across most leads, often
accompanied by PR depression. Unlike an MI, this ST elevation is not localized to a
specific coronary artery territory.
9. A thrombus that forms in the left atrium of a patient with atrial fibrillation is most likely
to cause which complication?
A. Pulmonary embolism
B. Deep vein thrombosis
C. Ischemic stroke
D. Myocardial infarction
CORRECT ANSWER: C
Rationale: In atrial fibrillation, the loss of effective atrial contraction leads to blood stasis
in the left atrium, increasing the risk of thrombus formation. If a thrombus dislodges, it
becomes an embolus that travels through the left heart and into the systemic
circulation. It commonly lodges in the cerebral vasculature, leading to a
thromboembolic stroke.
Comprehensive Exam 2Integrated
Systems & Advanced Pathophysiology
WITH CORRECT ANSWERS WELL VERIFIED
AND IN-DEPTH RATIONALES.
Section 1: Cardiovascular Pathophysiology (Questions 1-30)
1. A patient with chronic hypertension presents with shortness of breath and peripheral
edema. Which of the following best describes the underlying pathophysiological
process leading to these symptoms?
A. Decreased systemic vascular resistance
B. Left ventricular hypertrophy with subsequent heart failure
C. Right ventricular failure due to pulmonary embolism
D. Increased cardiac output from sympathetic stimulation
CORRECT ANSWER: B
Rationale: Chronic hypertension increases afterload, forcing the left ventricle to work
harder, leading to left ventricular hypertrophy (LVH). Over time, LVH leads to diastolic
and eventually systolic dysfunction, resulting in left-sided heart failure. This causes a
backup of blood into the pulmonary circulation (leading to shortness of breath) and, if
prolonged, can lead to right-sided failure and peripheral edema.
2. A myocardial infarction (MI) most commonly results from which of the following?
A. Vasospasm of a coronary artery
B. Rupture of an atherosclerotic plaque with subsequent thrombus formation
C. Embolism from a left ventricular thrombus
,D. Severe anemia leading to hypoxic injury
CORRECT ANSWER: B
Rationale: The most common cause of an MI is the rupture or erosion of a vulnerable
atherosclerotic plaque. This exposes the underlying collagen and tissue factor, leading
to platelet aggregation and thrombus formation that completely occludes the
coronary artery, causing ischemic necrosis of the myocardium.
3. The Frank-Starling law of the heart states that:
A. Cardiac output is directly proportional to afterload.
B. Stroke volume increases in response to an increase in preload.
C. Heart rate is inversely proportional to blood pressure.
D. Contractility decreases with increased venous return.
CORRECT ANSWER: B
Rationale: The Frank-Starling mechanism describes the intrinsic ability of the heart to
adapt to increased venous return. Increased preload (end-diastolic volume) stretches
the myocardial fibers, leading to a more forceful contraction and increased stroke
volume.
4. A patient is diagnosed with Left-Sided Heart Failure. Which of the following signs is
most characteristic of this condition?
A. Jugular venous distension
B. Hepatomegaly
C. Peripheral pitting edema
D. Pulmonary crackles (rales)
CORRECT ANSWER: D
Rationale: Left-sided heart failure results in an inability to pump blood forward, leading
to a backup of blood into the pulmonary circulation. This increases pulmonary capillary
hydrostatic pressure, causing fluid to leak into the interstitial spaces and alveoli, resulting
in pulmonary congestion, crackles, and dyspnea.
,5. In cardiogenic shock, the primary pathophysiological derangement is:
A. Hypovolemia due to massive bleeding
B. Systemic vasodilation causing hypotension
C. Failure of the heart to pump adequately
D. Obstruction of blood flow by a pulmonary embolism
CORRECT ANSWER: C
Rationale: Cardiogenic shock is a form of circulatory shock caused by the heart's
inability to maintain adequate cardiac output despite adequate intravascular volume.
This is most commonly due to a severe MI, leading to pump failure.
6. A patient with an abdominal aortic aneurysm (AAA) is at greatest risk for which acute
complication?
A. Embolization to the lower extremities
B. Dissection into the renal arteries
C. Rupture leading to hemorrhagic shock
D. Compression of the inferior vena cava
CORRECT ANSWER: C
Rationale: The most life-threatening complication of an AAA is rupture, which results in
massive intra-abdominal bleeding and rapid progression to hypovolemic shock. While
other complications can occur, rupture is the primary cause of mortality.
7. Aortic regurgitation (aortic insufficiency) results in:
A. Increased afterload on the right ventricle
B. A "water-hammer" pulse and volume overload of the left ventricle
C. A fixed, low cardiac output state
D. A holosystolic murmur heard at the apex
, CORRECT ANSWER: B
Rationale: In aortic regurgitation, blood leaks backward from the aorta into the left
ventricle during diastole. This causes volume overload of the left ventricle, which dilates
and hypertrophies. The increased stroke volume and rapid runoff of blood into the LV
during diastole produce a "water-hammer" (bounding) pulse.
8. Pericarditis is associated with which of the following ECG findings?
A. Pathologic Q waves
B. ST-segment elevation in a diffuse pattern
C. Depressed ST-segment in leads V1-V3
D. Prolonged PR interval
CORRECT ANSWER: B
Rationale: Pericarditis involves inflammation of the pericardial sac. The classic ECG
finding is diffuse, concave-upward ST-segment elevation across most leads, often
accompanied by PR depression. Unlike an MI, this ST elevation is not localized to a
specific coronary artery territory.
9. A thrombus that forms in the left atrium of a patient with atrial fibrillation is most likely
to cause which complication?
A. Pulmonary embolism
B. Deep vein thrombosis
C. Ischemic stroke
D. Myocardial infarction
CORRECT ANSWER: C
Rationale: In atrial fibrillation, the loss of effective atrial contraction leads to blood stasis
in the left atrium, increasing the risk of thrombus formation. If a thrombus dislodges, it
becomes an embolus that travels through the left heart and into the systemic
circulation. It commonly lodges in the cerebral vasculature, leading to a
thromboembolic stroke.
