NR511 FINAL EXAM 2026/2027 | Differential Diagnosis &
Primary Care Practicum | Latest Q&A Verified | Chamberlain |
Pass Guaranteed - A+ Graded
Q1: A 58-year-old male presents with crushing substernal chest pain radiating to his left
arm, diaphoresis, and nausea. Symptoms began 30 minutes ago while at rest. Vital
signs: BP 160/95 mmHg, HR 98 bpm, RR 22, O2 sat 96% on room air. EKG shows
ST-segment elevation in leads V2-V4. Which is the most appropriate immediate next
step?
A. Administer aspirin 325 mg and arrange for urgent cardiology consultation for primary
PCI within 90 minutes
B. Administer aspirin 325 mg, sublingual nitroglycerin, and schedule stress testing
within 72 hours
C. Administer aspirin 325 mg, sublingual nitroglycerin, morphine 2-4 mg IV, and arrange
for immediate transfer for primary PCI within 90 minutes of first medical contact
[CORRECT]
D. Administer aspirin 325 mg, clopidogrel 600 mg loading dose, and observe in
emergency department for 6 hours
Correct Answer: C
Rationale: This patient presents with classic STEMI (ST-elevation myocardial infarction)
based on crushing substernal chest pain with radiation, autonomic symptoms
(diaphoresis, nausea), and EKG findings of ST-elevation in anterior leads (V2-V4).
According to 2021 ACC/AHA/SCAI Guideline for Coronary Artery Revascularization and
2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure, the standard of
care for STEMI is immediate reperfusion therapy with primary PCI (percutaneous
,coronary intervention) within 90 minutes of first medical contact (door-to-balloon time
≤90 minutes).
Correct option analysis: Option C includes the complete acute management bundle:
aspirin (antiplatelet), nitroglycerin (afterload reduction, coronary vasodilation), morphine
(pain relief reduces catecholamine surge and myocardial oxygen demand), and
immediate transfer for primary PCI. The 90-minute window is critical—every 30-minute
delay increases mortality by 7.5%.
Why others are wrong: Option A misses nitroglycerin and morphine for symptom
control. Option B suggests stress testing, which is contraindicated in acute STEMI and
would be fatal. Option D suggests observation rather than immediate reperfusion,
violating the "time is muscle" principle; clopidogrel alone without PCI is insufficient for
STEMI.
Q2: A 45-year-old female with hypertension presents for follow-up. Her home BP
readings average 142/88 mmHg over the past month. Current medications: lisinopril 10
mg daily. She is African American. According to JNC 8 and 2017 ACC/AHA guidelines,
what is the most appropriate next step?
A. Increase lisinopril to 20 mg daily and recheck in 4 weeks
B. Add amlodipine 5 mg daily to lisinopril [CORRECT]
C. Switch to chlorthalidone 25 mg daily
D. Add metoprolol succinate 50 mg daily
Correct Answer: B
Rationale: The 2017 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and
Management of High Blood Pressure in Adults recommends a BP target of <130/80
mmHg for most adults, including this 45-year-old. Her current readings (142/88)
indicate inadequate control on monotherapy.
,Correct option analysis: According to JNC 8 and ACC/AHA, thiazide-like diuretics or
calcium channel blockers (CCBs) are preferred first-line in Black patients, but since
she's already on an ACE inhibitor (lisinopril), the evidence-based approach is to add a
CCB (amlodipine) rather than maximize ACE inhibitor alone. The ACC/AHA specifically
recommends combination therapy for stage 2 hypertension (BP ≥140/90) or when BP is
>20/10 mmHg above goal. This patient has stage 2 hypertension (142/88, though close
to threshold, home readings suggest sustained elevation).
Why others are wrong: Option A (maximizing ACE inhibitor) is less effective in African
American patients due to lower renin levels; combination therapy achieves better
control faster. Option C (switching to thiazide) discards the partially effective ACE
inhibitor and doesn't leverage combination therapy benefits. Option D (adding
beta-blocker) is not first-line for uncomplicated hypertension per current guidelines;
beta-blockers are indicated with compelling indications (CAD, heart failure,
arrhythmias).
Q3: A 62-year-old male with a 40 pack-year smoking history presents with progressive
dyspnea on exertion, chronic cough with clear sputum, and wheezing. Pulmonary
function tests show FEV1/FVC ratio of 0.62, FEV1 55% predicted, and minimal
bronchodilator reversibility. Chest X-ray shows hyperinflation and flattened diaphragms.
What is the most likely diagnosis?
A. Asthma
B. Chronic obstructive pulmonary disease (COPD) [CORRECT]
C. Congestive heart failure
D. Interstitial lung disease
Correct Answer: B
, Rationale: This patient presents with classic COPD presentation per GOLD 2024
Guidelines: significant smoking history (>20 pack-years), progressive dyspnea, chronic
productive cough, and airflow obstruction demonstrated by spirometry (FEV1/FVC
<0.70 confirms persistent airflow limitation). The FEV1 55% predicted indicates
moderate severity (GOLD Grade 2). Minimal bronchodilator reversibility (<12% and <200
mL increase in FEV1) distinguishes COPD from asthma. Radiographic findings of
hyperinflation and flattened diaphragms are characteristic of emphysema.
Correct option analysis: The diagnostic criteria are met: (1) exposure to risk factor
(cigarette smoke), (2) chronic respiratory symptoms, (3) post-bronchodilator FEV1/FVC
<0.70. The minimal reversibility and progressive nature differentiate from asthma.
Why others are wrong: Option A (Asthma) typically presents with episodic symptoms,
significant bronchodilator reversibility (>12% and >200 mL), and often younger onset
with allergic triggers. Option C (CHF) would show cardiomegaly, pulmonary edema,
orthopnea, and preserved FEV1/FVC ratio. Option D (ILD) presents with restrictive
pattern (normal or elevated FEV1/FVC, reduced TLC), dry cough, and bibasilar
crackles—not obstructive pattern seen here.
Q4: A 28-year-old female presents with dysuria, urinary frequency, and urgency for 2
days. She denies fever, flank pain, or vaginal discharge. Urinalysis shows positive
nitrites, leukocyte esterase, and 15-20 WBC/hpf. She is not pregnant and has no drug
allergies. What is the most appropriate treatment?
A. Ciprofloxacin 250 mg twice daily for 3 days
B. Nitrofurantoin monohydrate/macrocrystals 100 mg twice daily for 5 days [CORRECT]
C. Trimethoprim-sulfamethoxazole DS twice daily for 7 days
D. Amoxicillin 500 mg three times daily for 7 days
Correct Answer: B
Primary Care Practicum | Latest Q&A Verified | Chamberlain |
Pass Guaranteed - A+ Graded
Q1: A 58-year-old male presents with crushing substernal chest pain radiating to his left
arm, diaphoresis, and nausea. Symptoms began 30 minutes ago while at rest. Vital
signs: BP 160/95 mmHg, HR 98 bpm, RR 22, O2 sat 96% on room air. EKG shows
ST-segment elevation in leads V2-V4. Which is the most appropriate immediate next
step?
A. Administer aspirin 325 mg and arrange for urgent cardiology consultation for primary
PCI within 90 minutes
B. Administer aspirin 325 mg, sublingual nitroglycerin, and schedule stress testing
within 72 hours
C. Administer aspirin 325 mg, sublingual nitroglycerin, morphine 2-4 mg IV, and arrange
for immediate transfer for primary PCI within 90 minutes of first medical contact
[CORRECT]
D. Administer aspirin 325 mg, clopidogrel 600 mg loading dose, and observe in
emergency department for 6 hours
Correct Answer: C
Rationale: This patient presents with classic STEMI (ST-elevation myocardial infarction)
based on crushing substernal chest pain with radiation, autonomic symptoms
(diaphoresis, nausea), and EKG findings of ST-elevation in anterior leads (V2-V4).
According to 2021 ACC/AHA/SCAI Guideline for Coronary Artery Revascularization and
2022 AHA/ACC/HFSA Guideline for the Management of Heart Failure, the standard of
care for STEMI is immediate reperfusion therapy with primary PCI (percutaneous
,coronary intervention) within 90 minutes of first medical contact (door-to-balloon time
≤90 minutes).
Correct option analysis: Option C includes the complete acute management bundle:
aspirin (antiplatelet), nitroglycerin (afterload reduction, coronary vasodilation), morphine
(pain relief reduces catecholamine surge and myocardial oxygen demand), and
immediate transfer for primary PCI. The 90-minute window is critical—every 30-minute
delay increases mortality by 7.5%.
Why others are wrong: Option A misses nitroglycerin and morphine for symptom
control. Option B suggests stress testing, which is contraindicated in acute STEMI and
would be fatal. Option D suggests observation rather than immediate reperfusion,
violating the "time is muscle" principle; clopidogrel alone without PCI is insufficient for
STEMI.
Q2: A 45-year-old female with hypertension presents for follow-up. Her home BP
readings average 142/88 mmHg over the past month. Current medications: lisinopril 10
mg daily. She is African American. According to JNC 8 and 2017 ACC/AHA guidelines,
what is the most appropriate next step?
A. Increase lisinopril to 20 mg daily and recheck in 4 weeks
B. Add amlodipine 5 mg daily to lisinopril [CORRECT]
C. Switch to chlorthalidone 25 mg daily
D. Add metoprolol succinate 50 mg daily
Correct Answer: B
Rationale: The 2017 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and
Management of High Blood Pressure in Adults recommends a BP target of <130/80
mmHg for most adults, including this 45-year-old. Her current readings (142/88)
indicate inadequate control on monotherapy.
,Correct option analysis: According to JNC 8 and ACC/AHA, thiazide-like diuretics or
calcium channel blockers (CCBs) are preferred first-line in Black patients, but since
she's already on an ACE inhibitor (lisinopril), the evidence-based approach is to add a
CCB (amlodipine) rather than maximize ACE inhibitor alone. The ACC/AHA specifically
recommends combination therapy for stage 2 hypertension (BP ≥140/90) or when BP is
>20/10 mmHg above goal. This patient has stage 2 hypertension (142/88, though close
to threshold, home readings suggest sustained elevation).
Why others are wrong: Option A (maximizing ACE inhibitor) is less effective in African
American patients due to lower renin levels; combination therapy achieves better
control faster. Option C (switching to thiazide) discards the partially effective ACE
inhibitor and doesn't leverage combination therapy benefits. Option D (adding
beta-blocker) is not first-line for uncomplicated hypertension per current guidelines;
beta-blockers are indicated with compelling indications (CAD, heart failure,
arrhythmias).
Q3: A 62-year-old male with a 40 pack-year smoking history presents with progressive
dyspnea on exertion, chronic cough with clear sputum, and wheezing. Pulmonary
function tests show FEV1/FVC ratio of 0.62, FEV1 55% predicted, and minimal
bronchodilator reversibility. Chest X-ray shows hyperinflation and flattened diaphragms.
What is the most likely diagnosis?
A. Asthma
B. Chronic obstructive pulmonary disease (COPD) [CORRECT]
C. Congestive heart failure
D. Interstitial lung disease
Correct Answer: B
, Rationale: This patient presents with classic COPD presentation per GOLD 2024
Guidelines: significant smoking history (>20 pack-years), progressive dyspnea, chronic
productive cough, and airflow obstruction demonstrated by spirometry (FEV1/FVC
<0.70 confirms persistent airflow limitation). The FEV1 55% predicted indicates
moderate severity (GOLD Grade 2). Minimal bronchodilator reversibility (<12% and <200
mL increase in FEV1) distinguishes COPD from asthma. Radiographic findings of
hyperinflation and flattened diaphragms are characteristic of emphysema.
Correct option analysis: The diagnostic criteria are met: (1) exposure to risk factor
(cigarette smoke), (2) chronic respiratory symptoms, (3) post-bronchodilator FEV1/FVC
<0.70. The minimal reversibility and progressive nature differentiate from asthma.
Why others are wrong: Option A (Asthma) typically presents with episodic symptoms,
significant bronchodilator reversibility (>12% and >200 mL), and often younger onset
with allergic triggers. Option C (CHF) would show cardiomegaly, pulmonary edema,
orthopnea, and preserved FEV1/FVC ratio. Option D (ILD) presents with restrictive
pattern (normal or elevated FEV1/FVC, reduced TLC), dry cough, and bibasilar
crackles—not obstructive pattern seen here.
Q4: A 28-year-old female presents with dysuria, urinary frequency, and urgency for 2
days. She denies fever, flank pain, or vaginal discharge. Urinalysis shows positive
nitrites, leukocyte esterase, and 15-20 WBC/hpf. She is not pregnant and has no drug
allergies. What is the most appropriate treatment?
A. Ciprofloxacin 250 mg twice daily for 3 days
B. Nitrofurantoin monohydrate/macrocrystals 100 mg twice daily for 5 days [CORRECT]
C. Trimethoprim-sulfamethoxazole DS twice daily for 7 days
D. Amoxicillin 500 mg three times daily for 7 days
Correct Answer: B
