A 73-year-old female underwent an arteriovenous shunt and received general anesthesia. Desaturation and undetectable blood pressure suddenly developed 10 min after construction of an end-to-side anastomosis of a polytetrafluoroethylene graft between the left subclavian artery and the vein. Physical examinations revealed basal rales in both lungs and jugular venous distension. An iatrogenic left-to-right shunt induced acute pulmonary congestion was highly suspected. Access banding of the anastomosis from the artery to the polytetrafluoroethylene graft was immediately performed. The symptoms improved soon thereafter and postoperative intensive care was advised. The patient was discharged one week later without any other complications.