A 23-year-old man with pulmonary arteriovenous fistulas of the right middle lobe is described. During the incremental exercise test, the shunt fraction dropped from 19 percent to 12 percent as the cardiac output increased. We discuss the mechanism of this fall in shunt fraction in this patient during exercise.
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
- Critical Care and Intensive Care Medicine
- Cardiology and Cardiovascular Medicine