Diffuse hepatic arteriovenous malformation is extremery rare disease. A 69-year-old female was admitted to Nagoya Ekisaikai Hospital because of heart failure in NYHA class III. A selective celiac angiogram, echo cardiography and cardiac catheterization revealed high output cardiac failure secondary to diffuse hepatic areteriovenous malformations. Hepatic artery embolization with steel coils was performed. This resulted in amelioration of heart failure.