A 45-year-old female underwent coronary artery bypass grafting (CABG) due to medically uncontrollable unstable angina. After completion of CABG, left ventricular contraction was remarkably diminished to maintain systemic circulation. Because intraaortic balloon pumping and veno-arterial bypass with large amount of catecholamines could not improve left ventricular wall function, we decided to use left ventricular assist device (LVAD). After application of LVAD, the patient could easily be weaned from cardio-pulmonary bypass. LVAD was used for 25 days and the patient was successfully weaned from LVAD too, and are now living 6 months postoperatively. As far as we know, this case is the first survival patient after the longest cardiac assist in our country.