The goal of this study is to evaluate the ability of MDCT under stress to assess myocardial ischemia. There is some preliminary data in the literature showing the ability of MDCT under stress to bring relevant information about myocardial ischemia. Stress MDCT will have several advantages over single photon emission computed tomography (SPECT) imaging namely: shorter acquisition time, lower irradiation dose, lower cost. The feasibility of such experiment is still debated and need to be address in a clinical study.