An organic extract of Geum japonicum thunb var. (EGJ), and a pharmaceutical composition comprising the same. The organic EGJ has been identified to show potent dual effects on stimulating early growth (less than 48 hours) of new vessels both in ischemic heart muscles and in infracted heart muscles, and on triggering myocardial regeneration in myocardial infarction, and therefore, may be used in the treatment of ischemic diseases in human being or animals including ischemic heart disease and ischemic limbs, and damaged myocardium associated diseases.