Case Report

Pulmonary Arteriovenous Malformation Unmasked by Pregnancy: A Review of Pulmonary Arteriovenous Malformations and Cardiovascular and Respiratory Changes in Pregnancy

Table 1

Classification of pulmonary arteriovenous malformations [3, 14].

GroupSubgroupFeatures

IMultiple small arteriovenous fistulas
Without aneurysm

IILarge arteriovenous aneurysm

IIIA.Large arteriovenous aneurysm (central)
B.Large arteriovenous aneurysm with anomalous venous drainage
C.Multiple small arteriovenous fistulas with anomalous venous drainage

IVA.Large venous aneurysm with systemic artery communication
B.Large venous aneurysm without fistula

VAnomalous venous drainage with fistulas