There are cases where the heart vessels have undergone a complete blockage (CTO). In these cases, the opening of the vessel and treatment with a balloon and stent requires the use of special materials and techniques. Our center offers a complete range of these highly specialized materials, as well as extensive experience from both the nursing and medical staff in this complex form of treatment. It should be noted that Professor Zisis Dimitriadis is one of the few interventional cardiologists in all of Europe with certification from the European Cardiology Organization as a full member CTO, a certification that requires the completion of at least 300 such cases within two years.