Which of the Following are Contraindications for Performing an Exercise

Question

Which of the following are contraindications for performing an exercise test?
A) PaO2less than 40 mm Hg on room air
B) FEV1less than 70% of predicted
C) Sinus tachycardia
D) Dyspnea when lying flat in bed

Accepted Answer

A PaO2 less than 40 mm Hg on room air indicates severe hypoxemia, which is a contraindication for exercise testing due to the risk of exacerbating respiratory failure.