Functionally reversible hepatic arteriovenous fistulas during pregnancy in patients with hereditary hemorrhagic telangiectasia.

: Two patients with hereditary hemorrhagic telangiectasia (HHT) who previously had only rare episodes of epistaxis had during pregnancy congestive heart failure and signs consistent with hepatic AV shunts. These were confirmed by angiography in one patient. After delivery the patients recovered spontaneously, and within six months congestive heart failure disappeared.