4 Diagnosis of Unstable Angina by Detection of Postischemic Left Ventricular Diastolic Dyssynchrony Using Strain Image Derived From 2D Speckle Tracking(Echocardiography : Novel Concepts and Technologies in Evaluation of Diastolic Function,Japan-Korea Cardiovascular Conference,Presidential Planning Program (I),Special Program,The 72nd Annual Scientific Meeting of the Japanese Circulation Society)