Abstract
The interest in revascularization of chronic total occlusions (CTO) of the coronary arteries during the last decade has not waned. It is one of the latest challenges for percutaneous coronary interventions (PCI), requiring a specific organization of the patient pathway, dedicated equipment, and targeted medical expertise, now establishing CTO as a new discipline in interventional cardiology. Despite technical progress, the success rate of CTO-PCI is still lower than that of non-CTO-PCI, mainly due to guidewire failure. What can be the place of IVUS in CTO recanalization? IVUS offers a real-time cross-sectional image of the lumen and the vessel wall and meets all the criteria for assisting guidewire crossing. In addition, and as in any angioplasty of long and calcified complex lesions, IVUS participates in an optimal sizing of the stent and ensures its proper expansion. Optical coherence tomography (OCT) has no place, for multiple reasons, in the management of a CTO procedure but can help on remote control to ensure an optimal result, to validate the interest of a technique.Endocoronary imaging in CTO as in other complex situations is likely to optimize procedural results, to validate strategic options with the ultimate goal of improving clinical results.
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