Pulmonary arteriovenous malformation: not all hypoxemia during COVID-19 is the same

Hypoxemia in coronavirus disease 2019 (COVID-19) patients is multifaceted not only with alveolar damage but also with other factors such as vascular shunts, like pulmonary arteriovenous malformation.Diagnosing pulmonary arteriovenous malformation can be difficult due to overlapping symptoms with other respiratory disorders.Management of pulmonary arteriovenous malformation typically involves transcatheter embolization to block abnormal vascular connections and reduce the risk of complications like paradoxical emboli. Surgical options are reserved for severe cases, while pharmacological treatments are less common.