[Complications and clinical outcomes in remote period in patients subjected to percutaneous coronary interventions on chronic total occlusions of coronary arteries].

Percutaneous coronary interventions (PCI) on chronic total occlusions have been always associated with worse immediate results compared with interventions on nonoccluded arteries. From initial stage of development of interventional cardiology up to present time intervention on chronic occlusions has remained one of most technically sophisticated procedures. This is related to difficulties which arise during passage of chronic occlusions with guide wires and balloons.