Examination Practice Questions And
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Rationales 2026 Q&A | Instant Download
1. A 56-year-old male presents with acute chest pain radiating to his left
arm. ECG shows ST-elevation in leads II, III, and aVF. Which coronary
artery is most likely involved?
A. Left anterior descending
B. Right coronary artery
C. Circumflex artery
D. Left main coronary artery
Rationale: ST-elevation in II, III, and aVF indicates an inferior
myocardial infarction, most commonly due to right coronary artery
occlusion.
,2. Which of the following is the most appropriate initial treatment for a
patient in ventricular tachycardia with a pulse but unstable?
A. Amiodarone 150 mg IV
B. Synchronized cardioversion
C. Defibrillation
D. Lidocaine 1 mg/kg IV
Rationale: Unstable VT with a pulse requires immediate synchronized
cardioversion to restore perfusing rhythm.
3. During mechanical ventilation, which parameter primarily determines
oxygenation?
A. Respiratory rate
B. Tidal volume
C. Fraction of inspired oxygen (FiO2)
D. PEEP
Rationale: Oxygenation is mainly influenced by FiO2 and PEEP, while
ventilation is affected by tidal volume and rate.
4. A patient in septic shock demonstrates hypotension unresponsive to
fluid resuscitation. The next step should be:
A. Administer high-dose corticosteroids
B. Begin broad-spectrum antibiotics
C. Initiate vasopressor therapy
D. Begin diuretics
, Rationale: Persistent hypotension after fluids in septic shock requires
vasopressors, typically norepinephrine, to maintain perfusion.
5. Which drug is indicated for bradycardia with hypotension in the critical
care setting?
A. Atropine
B. Amiodarone
C. Epinephrine
D. Dopamine
Rationale: Atropine is first-line therapy for symptomatic bradycardia
to increase heart rate.
6. A patient with acute respiratory distress on BiPAP develops
hypotension and confusion. What is the most likely cause?
A. Pulmonary embolism
B. Tension pneumothorax
C. Myocardial infarction
D. Asthma exacerbation
Rationale: Hypotension and confusion in a patient on positive
pressure ventilation may indicate tension pneumothorax due to
increased intrathoracic pressure.
7. Which lab value is most critical to monitor in a patient receiving
continuous IV insulin for DKA?
A. Potassium
B. Sodium
, C. Glucose
D. Potassium and glucose simultaneously
Rationale: Insulin lowers glucose and drives potassium into cells,
risking hypokalemia; both must be closely monitored.
8. Which of the following medications is a vasopressor primarily used to
improve coronary perfusion in cardiac arrest?
A. Dopamine
B. Epinephrine infusion
C. Epinephrine bolus
D. Norepinephrine
Rationale: Epinephrine bolus during cardiac arrest increases coronary
and cerebral perfusion pressures.
9. In a patient with severe asthma exacerbation, which intervention is
considered first-line if oxygenation is inadequate?
A. IV corticosteroids
B. Nebulized albuterol and ipratropium
C. Magnesium sulfate infusion
D. Intubation
Rationale: First-line therapy for acute bronchospasm is nebulized
beta-agonists with anticholinergics; other interventions are adjuncts
or for refractory cases.
10. Which of the following best describes the use of norepinephrine
in shock?