With the aim of translate in clinical setting the more recently available basic research evidences on estrogens and androgens balance involvement in modulation of ischemia-reperfusion myocardial damage, the investigators planned to conduct a research study on patients, affected by suspected or known ischemic heart disease (IHD) undergoing angiography and/or percutaneous coronary interventions (PCI), aged more than 18 years of both sex in ratio 1:1. Thus, in this setting, the goals of this proposal are: