PATHO 370 PATHO TEST 2 TEST SOLUTION
EXAM QUESTIONS AND ANSWERS SOLVED
COMPLETE QUESTIONS AND ANSWERS
LATEST DOCS.
Domain 1: Cardiac Pathophysiology & Hypertension (12 Questions)
1. A patient presents with acute decompensated heart failure. During auscultation, the nurse
hears a low-pitched, extra sound immediately following the S2 heart sound, best heard at the
apex. Which hemodynamic event produces this S3 ventricular gallop?
A. The atrium contracting against a stiff, non-compliant ventricle.
B. The vibration of the ventricular walls during rapid, passive filling of a volume-overloaded
ventricle.
C. The turbulent flow of blood across a stenotic aortic valve during systole.
D. The friction of the pericardial layers as the heart beats.
2. A 58-year-old male presents with dyspnea on exertion and orthopnea. Echocardiogram
reveals an Ejection Fraction (EF) of 30%. Which pathophysiologic mechanism primarily
accounts for the presence of an S3 gallop in this patient?
A. Increased contractility of the left ventricle causing a forceful S2.
B. Impaired left ventricular systolic function leading to a high LVEDP and sudden cessation of
rapid ventricular filling.
C. Aortic regurgitation causing a backflow of blood into the ventricle during diastole.
D. Mitral stenosis obstructing blood flow from the left atrium to the left ventricle.
3. Which clinical scenario is most consistent with the pathophysiology of a Preload problem
characterized by an elevated Left Ventricular End-Diastolic Pressure (LVEDP)?
A. Systemic hypertension causing a thickened left ventricular wall.
B. Aortic stenosis increasing resistance to ventricular ejection.
,C. Acute volume overload from fluid retention in renal failure.
D. Coarctation of the aorta increasing systemic vascular resistance.
4. A patient with known hypertension presents with a loud systolic murmur radiating to the
carotids. The pathophysiology identified as an Afterload problem in this patient is best
described as:
A. Increased volume of blood returning to the left ventricle during diastole.
B. Increased resistance against which the left ventricle must pump to eject blood, such as
systemic aortic stenosis.
C. Decreased compliance of the left ventricle due to ischemic heart disease.
D. Failure of the mitral valve to close completely during systole.
5. A 70-year-old patient presents with crushing substernal chest pain. Cardiac biomarkers
reveal a Troponin I level of 2.5 ng/mL. Which cellular mechanism is responsible for this
elevation?
A. Release of biomarkers due to cellular apoptosis from chronic hypoxia.
B. Necrosis of cardiac myocytes secondary to prolonged ischemia following rupture of an
atherosclerotic plaque.
C. Increased permeability of the cell membrane due to viral myocarditis.
D. Mechanical stretch of the myocardium secondary to volume overload.
6. A patient presents with ST-segment elevation in leads V1-V4. The physician explains that
the underlying pathophysiology involves:
A. A rupture of an atherosclerotic plaque leading to platelet aggregation and total occlusion of
a coronary artery.
B. A temporary vasospasm of a coronary artery without permanent plaque damage.
C. A stable plaque that gradually narrowed the artery lumen over 80%.
D. An embolus traveling from the deep veins to the coronary arteries.
, 7. Which laboratory value confirms the diagnosis of an acute myocardial infarction (AMI) in
the context of clinical symptoms?
A. Troponin T > 0.4 ng/mL.
B. Creatine Kinase-MB (CK-MB) < 5%.
C. B-type Natriuretic Peptide (BNP) > 500 pg/mL.
D. Myoglobin < 50 ng/mL.
8. A patient experiences a sudden drop in Cardiac Output (CO) following a massive
arrhythmia. Which compensatory mechanism is immediately activated to restore perfusion
pressure?
A. Release of Atrial Natriuretic Peptide (ANP) to promote diuresis.
B. Activation of the Parasympathetic Nervous System to decrease heart rate.
C. Stimulation of the Renin-Angiotensin-Aldosterone System (RAAS).
D. Inhibition of the sympathetic nervous system.
9. As part of the RAAS compensatory mechanism, what is the direct effect of Angiotensin II on
the vascular system?
A. Vasodilation of the afferent arterioles to increase GFR.
B. Vasoconstriction of arterioles to increase Systemic Vascular Resistance (SVR) and blood
pressure.
C. Relaxation of the venous smooth muscle to decrease preload.
D. Inhibition of the adrenal cortex to reduce aldosterone secretion.
10. Following the activation of RAAS, which effect does Aldosterone have on sodium and
water balance?
A. Promotes sodium excretion and water retention in the distal tubules.
B. Promotes sodium and water reabsorption in the collecting ducts.
EXAM QUESTIONS AND ANSWERS SOLVED
COMPLETE QUESTIONS AND ANSWERS
LATEST DOCS.
Domain 1: Cardiac Pathophysiology & Hypertension (12 Questions)
1. A patient presents with acute decompensated heart failure. During auscultation, the nurse
hears a low-pitched, extra sound immediately following the S2 heart sound, best heard at the
apex. Which hemodynamic event produces this S3 ventricular gallop?
A. The atrium contracting against a stiff, non-compliant ventricle.
B. The vibration of the ventricular walls during rapid, passive filling of a volume-overloaded
ventricle.
C. The turbulent flow of blood across a stenotic aortic valve during systole.
D. The friction of the pericardial layers as the heart beats.
2. A 58-year-old male presents with dyspnea on exertion and orthopnea. Echocardiogram
reveals an Ejection Fraction (EF) of 30%. Which pathophysiologic mechanism primarily
accounts for the presence of an S3 gallop in this patient?
A. Increased contractility of the left ventricle causing a forceful S2.
B. Impaired left ventricular systolic function leading to a high LVEDP and sudden cessation of
rapid ventricular filling.
C. Aortic regurgitation causing a backflow of blood into the ventricle during diastole.
D. Mitral stenosis obstructing blood flow from the left atrium to the left ventricle.
3. Which clinical scenario is most consistent with the pathophysiology of a Preload problem
characterized by an elevated Left Ventricular End-Diastolic Pressure (LVEDP)?
A. Systemic hypertension causing a thickened left ventricular wall.
B. Aortic stenosis increasing resistance to ventricular ejection.
,C. Acute volume overload from fluid retention in renal failure.
D. Coarctation of the aorta increasing systemic vascular resistance.
4. A patient with known hypertension presents with a loud systolic murmur radiating to the
carotids. The pathophysiology identified as an Afterload problem in this patient is best
described as:
A. Increased volume of blood returning to the left ventricle during diastole.
B. Increased resistance against which the left ventricle must pump to eject blood, such as
systemic aortic stenosis.
C. Decreased compliance of the left ventricle due to ischemic heart disease.
D. Failure of the mitral valve to close completely during systole.
5. A 70-year-old patient presents with crushing substernal chest pain. Cardiac biomarkers
reveal a Troponin I level of 2.5 ng/mL. Which cellular mechanism is responsible for this
elevation?
A. Release of biomarkers due to cellular apoptosis from chronic hypoxia.
B. Necrosis of cardiac myocytes secondary to prolonged ischemia following rupture of an
atherosclerotic plaque.
C. Increased permeability of the cell membrane due to viral myocarditis.
D. Mechanical stretch of the myocardium secondary to volume overload.
6. A patient presents with ST-segment elevation in leads V1-V4. The physician explains that
the underlying pathophysiology involves:
A. A rupture of an atherosclerotic plaque leading to platelet aggregation and total occlusion of
a coronary artery.
B. A temporary vasospasm of a coronary artery without permanent plaque damage.
C. A stable plaque that gradually narrowed the artery lumen over 80%.
D. An embolus traveling from the deep veins to the coronary arteries.
, 7. Which laboratory value confirms the diagnosis of an acute myocardial infarction (AMI) in
the context of clinical symptoms?
A. Troponin T > 0.4 ng/mL.
B. Creatine Kinase-MB (CK-MB) < 5%.
C. B-type Natriuretic Peptide (BNP) > 500 pg/mL.
D. Myoglobin < 50 ng/mL.
8. A patient experiences a sudden drop in Cardiac Output (CO) following a massive
arrhythmia. Which compensatory mechanism is immediately activated to restore perfusion
pressure?
A. Release of Atrial Natriuretic Peptide (ANP) to promote diuresis.
B. Activation of the Parasympathetic Nervous System to decrease heart rate.
C. Stimulation of the Renin-Angiotensin-Aldosterone System (RAAS).
D. Inhibition of the sympathetic nervous system.
9. As part of the RAAS compensatory mechanism, what is the direct effect of Angiotensin II on
the vascular system?
A. Vasodilation of the afferent arterioles to increase GFR.
B. Vasoconstriction of arterioles to increase Systemic Vascular Resistance (SVR) and blood
pressure.
C. Relaxation of the venous smooth muscle to decrease preload.
D. Inhibition of the adrenal cortex to reduce aldosterone secretion.
10. Following the activation of RAAS, which effect does Aldosterone have on sodium and
water balance?
A. Promotes sodium excretion and water retention in the distal tubules.
B. Promotes sodium and water reabsorption in the collecting ducts.
