Which method should rescuers use to detect the presence of a dangerous atmosphere?

Which of the following is most likely to result in life-threatening hemorrhage?

A) Epistaxis B) Lacerated femoral artery C) Fractured radius and ulna D) Bleeding hemorrhoids

In which leads is a posterior MI evident?

A) V1—2 B) II, III, and aVR C) I and II D) V1—6