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Published on: September 22, 2020
Distal Vessel Diameter and Antegrade Crossing Success in Chronic Total Occlusion Percutaneous Coronary Intervention
Ning Yin1, Ping Wang1, Yuan Shan2
1Center for Coronary Artery Disease (CCAD), Beijing Anzhen Hospital, Capital Medical University, and Beijing Institute of Heart, Lung, and Blood Vessel Diseases, Beijing, China.
Insights
Distal vessel diameter is a key predictor of success for antegrade percutaneous coronary intervention (PCI) in chronic total occlusion (CTO) cases. Larger diameters significantly increase the likelihood of successful antegrade PCI (A-PCI) for CTO.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Biology
Background:
- Chronic total occlusion (CTO) presents a significant challenge in ischemic heart disease, increasing risks of heart failure and sudden cardiac death.
- Antegrade percutaneous coronary intervention (PCI) is a primary treatment, but its success rate for CTO is limited.
- While distal vessel diameter is known to be important in A-PCI, its predictive role in CTO populations needs further investigation.
Purpose of the Study:
- To investigate the relationship between distal vessel diameter and antegrade crossing success rate in patients undergoing antegrade PCI for CTO.
- To identify key predictors of successful A-PCI for CTO.
Main Methods:
- Retrospective study of 502 patients with CTO treated with antegrade PCI.
- Logistic regression and receiver operating characteristic curve analysis were used to assess the impact of distal vessel diameter on success rates.
Main Results:
- Antegrade crossing success was achieved in 72.5% of patients.
- Distal vessel diameter was significantly smaller in the failure group (1.60 mm) compared to the success group (1.94 mm).
- Distal vessel diameter was the strongest independent predictor of success, with each 0.5-mm increase tripling the odds of successful crossing.
Conclusions:
- Distal vessel diameter is the most powerful independent angiographic predictor of antegrade crossing success in CTO-PCI.
- Its predictive significance exceeds that of established proximal lesion characteristics like cap ambiguity.
Background:
Chronic total occlusion (CTO) is a particularly challenging subtype of ischemic heart disease, significantly elevating the risk of heart failure and sudden cardiac death. Percutaneous coronary intervention (PCI) is the primary revascularization approach. However, the success rate of antegrade PCI (A-PCI) for CTO remains relatively low. Although the distal vessel diameter is recognized as a critical anatomic parameter in A-PCI, it has received limited attention in studies of related populations.
Methods:
This retrospective study included 502 CTO patients treated with antegrade PCI from July 2023 to September 2024. The relationship between the distal vessel diameter and the antegrade crossing success rate was investigated using logistic regression analysis and receiver operating characteristic curve analysis.
Results:
Antegrade crossing success was achieved in 72.5% (364 of 502 patients). The distal vessel diameter was significantly smaller in the failure group (1.60 ± 0.39 mm) compared to the success group (1.94 ± 0.41 mm; P < 0.001). In the multivariate logistic regression, distal vessel diameter was the most potent independent predictor of success. Each 0.5-mm increase in diameter was associated with more than triple the odds of successful crossing (odds ratio: 3.06; 95% confidence interval: 2.22-4.32; P < 0.001). This positive predictor had a greater predictive magnitude than the strongest negative predictor, proximal cap ambiguity (odds ratio: 0.35; 95% confidence interval: 0.21-0.58; P < 0.001).
Conclusions:
Distal vessel diameter is the most powerful independent angiographic predictor of antegrade crossing success in CTO-PCI, with a predictive significance surpassing that of established proximal lesion characteristics such as cap ambiguity.
