PROBLEM TO BE SOLVED: To provide a circulatory support agent useful as a prophylactic/therapeutic agent for heart failure to protect myocardia in every heart failure and to maintain a life and circulation of an individual.SOLUTION: The circulatory support agent includes an oxygen carrier with a particle diameter smaller than that of an erythrocyte as an active constituent. The maximum particle diameter of the oxygen carrier is not larger than 1 μm.COPYRIGHT: (C)2013,JPO&INPIT【課題】あらゆる心不全における心筋保護と個体の生命および循環維持のための循環補助薬の提供。心不全の予防/治療薬として有用である。【解決手段】赤血球よりも小粒子径の酸素運搬体を有効成分とする循環補助薬。【選択図】なし