Wilmshurst P, Jackson P
Division of Cardiology, Royal Shrewsbury Hospital, England.
Chest. 1996 Nov;110(5):1368-9. doi: 10.1378/chest.110.5.1368.
A patient developed symptomatic exercise-induced hypoxemia during pregnancy as a result of pulmonary arteriovenous microfistulas. Her symptoms resolved after pregnancy with spontaneous closure of the fistulas. Hormone-induced vasodilation is the probable mechanism.