Week 7 i-Human Case Study Actual Exam 2026/2027
– Dyspnea in a 60-Year-Old Female – Comprehensive
Case Analysis CHF Diagnosis – Walden University –
Pass Guaranteed – A+ Graded
History Taking & Differential Diagnosis
Q1: When evaluating a patient presenting with dyspnea, understanding functional
capacity is essential. According to the New York Heart Association (NYHA)
classification system, which description best represents Class III heart failure?
A. No limitation of physical activity; ordinary activity does not cause symptoms
B. Slight limitation of physical activity; comfortable at rest, but ordinary physical activity
results in symptoms
C. Marked limitation of physical activity; comfortable at rest, but less than ordinary
activity causes symptoms [CORRECT]
D. Unable to carry on any physical activity without symptoms; symptoms present even
at rest
Correct Answer: C
Rationale: NYHA Class III is defined by marked limitation where patients are
comfortable at rest but experience symptoms with less than ordinary physical activity.
Class I has no limitation, Class II has slight limitation with ordinary activity, and Class IV
has symptoms at rest.
Q2: You're reviewing laboratory values for your dyspneic patient. What is the generally
accepted upper limit of normal for B-type natriuretic peptide (BNP) in the diagnosis of
heart failure?
A. 50 pg/mL
B. 100 pg/mL [CORRECT]
C. 400 pg/mL
D. 900 pg/mL
,Correct Answer: B
Rationale: The commonly accepted cutoff for normal BNP is 100 pg/mL, with values
above this suggesting heart failure. NT-proBNP uses age-stratified cutoffs. Values
below 100 make heart failure less likely, though clinical context always matters.
Q3: In the pathophysiology of heart failure with reduced ejection fraction (HFrEF), which
neurohormonal system is initially activated as a compensatory mechanism but
ultimately contributes to disease progression?
A. Parasympathetic nervous system
B. Renin-angiotensin-aldosterone system (RAAS) [CORRECT]
C. Glucagon-like peptide-1 system
D. Dopaminergic system
Correct Answer: B
Rationale: RAAS activation initially maintains perfusion pressure but chronically leads to
vasoconstriction, sodium retention, and adverse remodeling. While initially
compensatory, sustained RAAS activation worsens outcomes, which is why ACE
inhibitors and ARBs are foundational therapies.
Q4: Mrs. Anderson, a 60-year-old female, reports that she wakes up suddenly at night
gasping for air and must sit upright by the window to catch her breath. This symptom
pattern most strongly suggests which underlying pathophysiology?
A. Bronchospastic airway disease
B. Paroxysmal nocturnal dyspnea from pulmonary venous congestion [CORRECT]
C. Anxiety-related hyperventilation syndrome
D. Obstructive sleep apnea
Correct Answer: B
Rationale: Paroxysmal nocturnal dyspnea (PND) is classic for heart failure; when supine,
fluid redistributes centrally, increasing preload and causing pulmonary congestion that
awakens patients. They typically need to sit or stand to relieve symptoms, unlike
asthma or anxiety patterns.
Q5: During your history taking, you ask about positional breathing changes. The patient
states she uses three pillows to sleep comfortably and feels short of breath when lying
flat. What is the clinical significance of this finding?
A. It indicates chronic obstructive pulmonary disease exacerbation
, B. It suggests orthopnea consistent with elevated left atrial pressures [CORRECT]
C. It confirms a diagnosis of pneumonia
D. It rules out cardiac causes of dyspnea
Correct Answer: B
Rationale: Orthopnea (dyspnea when supine) indicates that recumbent positioning
worsens pulmonary congestion, typically from elevated left atrial pressures seen in
left-sided heart failure. The number of pillows often correlates with severity.
Q6: You are evaluating a 60-year-old woman with acute dyspnea. Which historical
feature would most strongly suggest pulmonary embolism rather than heart failure as
the cause?
A. Gradual onset of symptoms over months
B. Sudden onset of pleuritic chest pain with recent long-haul travel [CORRECT]
C. Improvement with sitting upright
D. Bilateral ankle swelling developing over weeks
Correct Answer: B
Rationale: Pulmonary embolism typically presents with acute onset, pleuritic pain, and
risk factors like immobilization or travel. Heart failure symptoms usually develop more
gradually and improve with upright positioning rather than being sudden and pleuritic.
Q7: Your patient reports fatigue and dyspnea on exertion but denies chest pain or
palpitations. She mentions craving ice and chewing on ice chips constantly. Which
laboratory finding would you most expect?
A. Elevated troponin
B. Iron deficiency anemia with low hemoglobin [CORRECT]
C. Elevated BNP above 1000 pg/mL
D. Hyperthyroidism
Correct Answer: B
Rationale: Pagophagia (ice craving) is highly specific for iron deficiency anemia. Anemia
can cause dyspnea on exertion through reduced oxygen-carrying capacity, mimicking
cardiac causes but without the classic heart failure signs like edema or jugular venous
distension.
Q8: Clinical Scenario: Mrs. Chen presents with progressive dyspnea. She notes her
breathing worsens when lying down, improves when she props herself up, and she
– Dyspnea in a 60-Year-Old Female – Comprehensive
Case Analysis CHF Diagnosis – Walden University –
Pass Guaranteed – A+ Graded
History Taking & Differential Diagnosis
Q1: When evaluating a patient presenting with dyspnea, understanding functional
capacity is essential. According to the New York Heart Association (NYHA)
classification system, which description best represents Class III heart failure?
A. No limitation of physical activity; ordinary activity does not cause symptoms
B. Slight limitation of physical activity; comfortable at rest, but ordinary physical activity
results in symptoms
C. Marked limitation of physical activity; comfortable at rest, but less than ordinary
activity causes symptoms [CORRECT]
D. Unable to carry on any physical activity without symptoms; symptoms present even
at rest
Correct Answer: C
Rationale: NYHA Class III is defined by marked limitation where patients are
comfortable at rest but experience symptoms with less than ordinary physical activity.
Class I has no limitation, Class II has slight limitation with ordinary activity, and Class IV
has symptoms at rest.
Q2: You're reviewing laboratory values for your dyspneic patient. What is the generally
accepted upper limit of normal for B-type natriuretic peptide (BNP) in the diagnosis of
heart failure?
A. 50 pg/mL
B. 100 pg/mL [CORRECT]
C. 400 pg/mL
D. 900 pg/mL
,Correct Answer: B
Rationale: The commonly accepted cutoff for normal BNP is 100 pg/mL, with values
above this suggesting heart failure. NT-proBNP uses age-stratified cutoffs. Values
below 100 make heart failure less likely, though clinical context always matters.
Q3: In the pathophysiology of heart failure with reduced ejection fraction (HFrEF), which
neurohormonal system is initially activated as a compensatory mechanism but
ultimately contributes to disease progression?
A. Parasympathetic nervous system
B. Renin-angiotensin-aldosterone system (RAAS) [CORRECT]
C. Glucagon-like peptide-1 system
D. Dopaminergic system
Correct Answer: B
Rationale: RAAS activation initially maintains perfusion pressure but chronically leads to
vasoconstriction, sodium retention, and adverse remodeling. While initially
compensatory, sustained RAAS activation worsens outcomes, which is why ACE
inhibitors and ARBs are foundational therapies.
Q4: Mrs. Anderson, a 60-year-old female, reports that she wakes up suddenly at night
gasping for air and must sit upright by the window to catch her breath. This symptom
pattern most strongly suggests which underlying pathophysiology?
A. Bronchospastic airway disease
B. Paroxysmal nocturnal dyspnea from pulmonary venous congestion [CORRECT]
C. Anxiety-related hyperventilation syndrome
D. Obstructive sleep apnea
Correct Answer: B
Rationale: Paroxysmal nocturnal dyspnea (PND) is classic for heart failure; when supine,
fluid redistributes centrally, increasing preload and causing pulmonary congestion that
awakens patients. They typically need to sit or stand to relieve symptoms, unlike
asthma or anxiety patterns.
Q5: During your history taking, you ask about positional breathing changes. The patient
states she uses three pillows to sleep comfortably and feels short of breath when lying
flat. What is the clinical significance of this finding?
A. It indicates chronic obstructive pulmonary disease exacerbation
, B. It suggests orthopnea consistent with elevated left atrial pressures [CORRECT]
C. It confirms a diagnosis of pneumonia
D. It rules out cardiac causes of dyspnea
Correct Answer: B
Rationale: Orthopnea (dyspnea when supine) indicates that recumbent positioning
worsens pulmonary congestion, typically from elevated left atrial pressures seen in
left-sided heart failure. The number of pillows often correlates with severity.
Q6: You are evaluating a 60-year-old woman with acute dyspnea. Which historical
feature would most strongly suggest pulmonary embolism rather than heart failure as
the cause?
A. Gradual onset of symptoms over months
B. Sudden onset of pleuritic chest pain with recent long-haul travel [CORRECT]
C. Improvement with sitting upright
D. Bilateral ankle swelling developing over weeks
Correct Answer: B
Rationale: Pulmonary embolism typically presents with acute onset, pleuritic pain, and
risk factors like immobilization or travel. Heart failure symptoms usually develop more
gradually and improve with upright positioning rather than being sudden and pleuritic.
Q7: Your patient reports fatigue and dyspnea on exertion but denies chest pain or
palpitations. She mentions craving ice and chewing on ice chips constantly. Which
laboratory finding would you most expect?
A. Elevated troponin
B. Iron deficiency anemia with low hemoglobin [CORRECT]
C. Elevated BNP above 1000 pg/mL
D. Hyperthyroidism
Correct Answer: B
Rationale: Pagophagia (ice craving) is highly specific for iron deficiency anemia. Anemia
can cause dyspnea on exertion through reduced oxygen-carrying capacity, mimicking
cardiac causes but without the classic heart failure signs like edema or jugular venous
distension.
Q8: Clinical Scenario: Mrs. Chen presents with progressive dyspnea. She notes her
breathing worsens when lying down, improves when she props herself up, and she
