Percutaneous Coronary Intervention for Chronic Total Occlusions
Summary
Chronic total occlusions (CTOs) represent complete blockages of coronary arteries persisting for at least three months. They are encountered in up to 20 % of patients with coronary artery disease and present among the most challenging lesions for interventional cardiologists. Successful percutaneous coronary intervention (PCI) of CTOs can alleviate angina, improve left ventricular function and reduce long-term adverse events, yet procedural complexity and potential complications have historically limited its use. Advances in guidewire technology, microcatheter design and adjunctive imaging have led to the development of hybrid algorithms that integrate antegrade and retrograde approaches, yielding success rates exceeding 85 % at experienced centres. Patient selection has shifted from purely anatomical considerations towards assessment of ischaemic burden, viability and potential functional gain. Despite enhanced success, risks of perforation, bleeding and in-stent restenosis remain, underscoring the importance of meticulous planning, operator expertise and the judicious use of enabling strategies. Globally, the growing infrastructure of dedicated CTO programmes and multicentre registries has fostered collaborative learning, contributing to standardised training pathways and more consistent outcomes across regions.
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Percutaneous Coronary Intervention for Chronic Total Occlusions publication trend
The graph below shows the total number of articles in percutaneous coronary intervention for chronic total occlusions across all publications each year (not limited to Nature Index journals).
Technical terms
Chronic Total Occlusion (CTO): A coronary artery segment with 100 % luminal obstruction of at least three months’ duration.
Percutaneous Coronary Intervention (PCI): A minimally invasive procedure using catheters and stents to restore vessel patency in obstructed coronary arteries.
Enabling Strategies: Adjunctive techniques or devices—such as intravascular imaging, atherectomy and specialised guidewires—employed to facilitate crossing and treatment of complex occlusions.
Recanalisation: The process of establishing or re-establishing blood flow through an occluded vessel segment.
Intravascular Imaging: Modalities (for example intravascular ultrasound or optical coherence tomography) that provide detailed visualisation of vessel morphology and guide PCI decision-making.
References
- Procedural Success and Outcomes With Increasing Use of Enabling Strategies for Chronic Total Occlusion Intervention. Circulation Cardiovascular Interventions (2018).
- Long-term outcomes of medical therapy versus successful recanalisation for coronary chronic total occlusions in patients with and without type 2 diabetes mellitus. Cardiovascular Diabetology (2020).
- A comparison of procedural success rate and long-term clinical outcomes between in-stent restenosis chronic total occlusion and de novo chronic total occlusion using multicenter registry data. Clinical Research in Cardiology (2019).
- Percutaneous Coronary Intervention of Chronic Total Occlusions: When and How to Treat. Cardiovascular Revascularization Medicine (2018).
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