Summary: The clinical values of coils emboliztion in the treatment of pulmonary arteriovenousmalformations (PAVM) and related complications were investigated. Eleven patients withPAVMs verified by pulmonary arterial angiography were treated by transcatheter coils emboliza-tion. Chest X-ray (11 cases), computer tomography (7 cases) and/or magnetic resonance imaging(2 cases) were performed before embolization. Blood-gas analysis was done in 5 cases before andafter embolization. The follow-up materials of 8 patients were collected to evaluate the effect ofembolization with coils. The clinical manifestations included cerebral embolus, hemoptysis and de-creased oxygenation in 9 patients and the remaining 2 had no symptoms. 9/11 cases were found bychest X-ray and 8 were diagnosed definitely. 7/7, 2/2 cases were diagnosed by CT or MR and di-agnosis was made in all cases. Embolization was performed in 29 vessels. Partial pressure of oxy-gen in arterial blood of 5 eases changed significantly before and after embolization. Slight compli-cations occurred in 6 patients, such as low fever, chest pain, pleurisy. The follow-up resultsshowed that 7 cases were cured effectively. No primary and secondary device migration, and nomedical paradoxical embolization occurred. It was concluded that coils emboliztion is a well-estab-lished method for treating PAVMs. It is a minimally invasive lung preserving treatment with highefficiency and less complication.