Macrovascular pulmonary arteriovenous malformations demonstrated by radionuclide method

Pulmonary arteriovenous malformations (AVMs) are abnormal vascular communications that allow unoxygenated blood to pass from the venous to the arterial circulation. Usually congenital in origin and twice as likely in women, hemoptysis, dyspnea, and chest pain are the common presenting complaints in AVM. A case of pulmonary AVMs that were demonstrated on a radionuclide angiogram is presented. Pulmonary AVMs were suspected after finding radioactivity in both kidneys on a perfusion lung scan.