AEMCA Medical Emergencies 3

Question 1

Which electrolyte abnormality is most associated with peaked T-waves and widened QRS complex on ECG?

Accepted Answer

Hyperkalemia

Answer

Hyperkalemia causes progressive ECG changes including peaked T-waves, prolonged PR interval, widened QRS, and ultimately a sine-wave pattern.

Question 2

A patient with COPD is found unconscious with a respiratory rate of 6 breaths/min. Which oxygen delivery concern is most relevant?

Accepted Answer

Suppression of hypoxic respiratory drive

Answer

Some COPD patients rely on hypoxic drive to breathe; high-flow oxygen can suppress this drive and worsen hypoventilation.

Question 3

In a patient with suspected pulmonary embolism, which triad of findings is classically described?

Accepted Answer

Hemoptysis, pleuritic chest pain, dyspnea

Answer

The classic PE triad includes hemoptysis, pleuritic chest pain, and dyspnea, though all three are present in only a minority of cases.

Question 4

A patient presents with sudden unilateral leg swelling, warmth, and redness after a long flight. What condition must be ruled out first?

Accepted Answer

Deep vein thrombosis

Answer

Deep vein thrombosis must be ruled out first given the risk of embolization to the pulmonary vasculature, which can be fatal.

Question 5

Which of the following medications is a known cause of medication-induced hypoglycemia?

Accepted Answer

Sulfonylureas such as glipizide

Answer

Sulfonylureas stimulate insulin secretion regardless of blood glucose level, making hypoglycemia a significant risk even without excess dosing.

AEMCA - Advanced Emergency Medical Care Assistant Practice Test