D454 Objective Assessment – WGU Adult Health III OA 2026 |
Most Tested Questions & Verified Answers with Bold Italic
Explanations | Complete Study Guide Chamberlain University
D454 Objective Assessment – WGU Adult Health III OA provides most tested
practice questions with verified answers and bold italic explanations covering all
core nursing domains for the WGU Adult Health III exam. Each question is followed
immediately by its correct answer and detailed rationale, making it ideal for
focused review and quick retention
SECTION 1: CARDIOVASCULAR EMERGENCIES & DISORDERS (Questions 1–35)
1. A client with a history of heart failure is admitted with acute shortness of
breath, crackles in both lung bases, and an SpO₂ of 88% on room air. Which
nursing action should the nurse perform FIRST?
A) Administer prescribed IV furosemide
B) Apply supplemental oxygen
C) Place the client in high Fowler's position
D) Obtain a stat chest X-ray
Answer: B) Apply supplemental oxygen
Explanation: The priority is to address airway, breathing, and circulation
(ABCs). Hypoxemia (SpO₂ 88%) is an immediate threat, so applying oxygen
to improve oxygenation is the first action before other interventions.
Furosemide, positioning, and chest X-ray follow.
,2. The nurse is caring for a client with left-sided heart failure. Which finding
is MOST characteristic?
A) Jugular vein distention and ascites
B) Crackles in the lung bases and dyspnea
C) Peripheral edema and hepatomegaly
D) Cool extremities and oliguria
Answer: B) Crackles in the lung bases and dyspnea
Explanation: Left-sided failure causes blood to back up into the pulmonary
circulation, producing pulmonary congestion, crackles, and shortness of
breath. Right-sided failure causes systemic congestion (JVD, peripheral
edema, hepatomegaly).
3. A client with atrial fibrillation is prescribed warfarin. Which laboratory
test is used to monitor therapy?
A) aPTT
B) INR
C) Troponin
D) BNP
Answer: B) INR
Explanation: Warfarin therapy is monitored using PT/INR. The therapeutic
goal for atrial fibrillation is typically 2.0 to 3.0. aPTT is used for heparin
monitoring.
,4. The nurse understands that the primary complication prevented by
anticoagulation in atrial fibrillation is:
A) Pneumonia
B) Stroke
C) Heart failure only
D) Renal failure
Answer: B) Stroke
Explanation: Atrial fibrillation promotes atrial thrombus formation, which
can embolize to the brain and cause a stroke. Anticoagulation prevents
thrombus formation.
5. Which medication reverses the effects of heparin?
A) Vitamin K
B) Protamine sulfate
C) Naloxone
D) Acetylcysteine
Answer: B) Protamine sulfate
Explanation: Protamine sulfate neutralizes unfractionated heparin. Vitamin K
is the antidote for warfarin, naloxone for opioids, and acetylcysteine for
acetaminophen toxicity.
, 6. Which medication is the standard antidote for significant warfarin-
associated bleeding?
A) Vitamin K
B) Protamine
C) Atropine
D) Calcium gluconate
Answer: A) Vitamin K
Explanation: Vitamin K reverses warfarin's anticoagulant effects. Fresh
frozen plasma or prothrombin complex concentrate may also be given for
severe bleeding.
7. A client reports crushing substernal chest pain radiating to the left arm
with diaphoresis. Which action is the priority?
A) Obtain a 12-lead ECG
B) Encourage ambulation
C) Give oral fluids
D) Place the client in Trendelenburg
Answer: A) Obtain a 12-lead ECG
Explanation: A 12-lead ECG rapidly identifies ischemic changes and is
essential in suspected acute coronary syndrome. The ECG should be
obtained within 10 minutes of presentation.
8. Which ECG finding is most characteristic of an acute STEMI?
Most Tested Questions & Verified Answers with Bold Italic
Explanations | Complete Study Guide Chamberlain University
D454 Objective Assessment – WGU Adult Health III OA provides most tested
practice questions with verified answers and bold italic explanations covering all
core nursing domains for the WGU Adult Health III exam. Each question is followed
immediately by its correct answer and detailed rationale, making it ideal for
focused review and quick retention
SECTION 1: CARDIOVASCULAR EMERGENCIES & DISORDERS (Questions 1–35)
1. A client with a history of heart failure is admitted with acute shortness of
breath, crackles in both lung bases, and an SpO₂ of 88% on room air. Which
nursing action should the nurse perform FIRST?
A) Administer prescribed IV furosemide
B) Apply supplemental oxygen
C) Place the client in high Fowler's position
D) Obtain a stat chest X-ray
Answer: B) Apply supplemental oxygen
Explanation: The priority is to address airway, breathing, and circulation
(ABCs). Hypoxemia (SpO₂ 88%) is an immediate threat, so applying oxygen
to improve oxygenation is the first action before other interventions.
Furosemide, positioning, and chest X-ray follow.
,2. The nurse is caring for a client with left-sided heart failure. Which finding
is MOST characteristic?
A) Jugular vein distention and ascites
B) Crackles in the lung bases and dyspnea
C) Peripheral edema and hepatomegaly
D) Cool extremities and oliguria
Answer: B) Crackles in the lung bases and dyspnea
Explanation: Left-sided failure causes blood to back up into the pulmonary
circulation, producing pulmonary congestion, crackles, and shortness of
breath. Right-sided failure causes systemic congestion (JVD, peripheral
edema, hepatomegaly).
3. A client with atrial fibrillation is prescribed warfarin. Which laboratory
test is used to monitor therapy?
A) aPTT
B) INR
C) Troponin
D) BNP
Answer: B) INR
Explanation: Warfarin therapy is monitored using PT/INR. The therapeutic
goal for atrial fibrillation is typically 2.0 to 3.0. aPTT is used for heparin
monitoring.
,4. The nurse understands that the primary complication prevented by
anticoagulation in atrial fibrillation is:
A) Pneumonia
B) Stroke
C) Heart failure only
D) Renal failure
Answer: B) Stroke
Explanation: Atrial fibrillation promotes atrial thrombus formation, which
can embolize to the brain and cause a stroke. Anticoagulation prevents
thrombus formation.
5. Which medication reverses the effects of heparin?
A) Vitamin K
B) Protamine sulfate
C) Naloxone
D) Acetylcysteine
Answer: B) Protamine sulfate
Explanation: Protamine sulfate neutralizes unfractionated heparin. Vitamin K
is the antidote for warfarin, naloxone for opioids, and acetylcysteine for
acetaminophen toxicity.
, 6. Which medication is the standard antidote for significant warfarin-
associated bleeding?
A) Vitamin K
B) Protamine
C) Atropine
D) Calcium gluconate
Answer: A) Vitamin K
Explanation: Vitamin K reverses warfarin's anticoagulant effects. Fresh
frozen plasma or prothrombin complex concentrate may also be given for
severe bleeding.
7. A client reports crushing substernal chest pain radiating to the left arm
with diaphoresis. Which action is the priority?
A) Obtain a 12-lead ECG
B) Encourage ambulation
C) Give oral fluids
D) Place the client in Trendelenburg
Answer: A) Obtain a 12-lead ECG
Explanation: A 12-lead ECG rapidly identifies ischemic changes and is
essential in suspected acute coronary syndrome. The ECG should be
obtained within 10 minutes of presentation.
8. Which ECG finding is most characteristic of an acute STEMI?
