Which of the following can be identified by pulmonary angiography?

1. Pulmonary emboli
2. Coronary artery occlusions
3. Arteriovenous malformations
4. Cause of hemoptysis
a. 4
b. 1, 3
c. 2, 3, 4
d. 1, 2, 3, 4

B
Pulmonary angiography can identify pulmonary emboli and arteriovenous malformations. A coronary angiogram is needed to find coronary artery occlusions. A bronchoscopy may be needed to find the source of hemoptysis.