Shin SM, et al. - In this study, the CT angiography (CTA) findings of pulmonary arteriovenous malformation (PAVMs) were assessed in individuals with hereditary hemorrhagic telangiectasia and to correlate these findings with those of graded contrast-enhanced transthoracic echocardiography (CE-TTE). Researcher performed a retrospective review of PAVMs visualized at CTA of patients with abnormal CE-TTE findings (3-point scale). They recorded location, distribution, size, number, volume, grade, and relative attenuation (attenuation of PAVM divided by attenuation of aorta) of PAVMs. They tried to find out the association between PAVM grade and relative attenuation and between CTA variables and CE-TTE grades. A total of 40 patients were included in the study (median age, 14.9 years; range, 0.6–27.9 years). Grade 4 PAVMs were found to be the most common In children and young adults with hereditary hemorrhagic telangiectasia,. It was noted that higher-grade PAVMs more often have right-to-left shunts.