The data to be collected will be different in patients with nSTE - ACS compared to patients with stable coronary artery disease. As an initiative of quality improvement, and according to extensive international literature on the subject, will not be requested individual informed consent to selected patients but only the approval of the Ethics Committee of the Center Coordinator. Patient data will be de-identified and used only in the aggregate and all individual sensitive information (name, phone, address) will be erased.