herein, we report a patient with arterio-venous fistula secondary to mycotic aneurysm, causing high output heart failure. the patient had one-year history of refractory heart failure and recurrent pulmonary edema. this presentation is a good example of curative surgically treatable cause of high-output congestive heart failure. iran j med sci 2005; 30(1): 41-44. keywords ● arterio-venous fist...