Percutaneous intervention on anomalous circumflex coronary arteries--a single centre experience
Kenneth P Morgan1, Gwilym M Morris, Yahya Al-Najjar
1Manchester Heart Centre, Manchester Royal Infirmary, Manchester, UK.
Insights
Percutaneous coronary intervention (PCI) for anomalous circumflex arteries is feasible and safe, despite potential technical challenges. This study shows favorable short and long-term outcomes for PCI in these unique coronary artery anomalies.
Area of Science:
- Interventional Cardiology
- Coronary Artery Anomalies
- Vascular Interventions
Background:
- Anomalous origins of the circumflex artery are common during coronary angiography.
- Limited data exists on percutaneous intervention (PCI) for these anomalous vessels.
- This study compares PCI in anomalous vs. non-anomalous circumflex arteries.
Purpose of the Study:
- To examine the experience with PCI in anomalous circumflex vessels.
- To compare procedural characteristics and outcomes of PCI in anomalous vs. non-anomalous circumflex arteries.
- To describe techniques for successful PCI in anomalous circumflex vessels.
Main Methods:
- A retrospective analysis of 20 PCI procedures on anomalous circumflex vessels over 41 months.
- Comparison with 1550 PCI procedures on non-anomalous circumflex arteries.
- Analysis of patient demographics, coronary disease patterns, procedural success, and clinical outcomes.
Main Results:
- Anomalous circumflex arteries originated from the left coronary cusp, right coronary cusp, or proximal right coronary artery.
- No significant differences in demographics or coronary disease severity between groups.
- Higher acute presentations in the anomalous group, with longer screening times.
- All 20 procedures on anomalous vessels achieved immediate success; one peri-procedural MI occurred unrelated to target intervention.
- Median follow-up of 7.3 months showed one ischemia-driven revascularization to a non-target branch in the anomalous group.
Conclusions:
- PCI for anomalous circumflex coronary arteries is technically challenging but feasible.
- Favorable short- and long-term clinical outcomes are achievable.
- Specific techniques can optimize procedural success in these cases.
Background:
Anomalies of the origin and course of the circumflex artery are amongst the most common seen at coronary angiography. There is limited information regarding patient and procedural characteristics, technical feasibility and outcomes associated with percutaneous intervention (PCI) to these vessels. The aim of this study is to examine our experience with PCI to anomalous circumflex vessels and compare this to some aspects of percutaneous intervention on non-anomalous circumflex vessels.
Methods:
Over a 41 month period, 20 PCI procedures on anomalous circumflex vessels were identified and 1550 PCI procedures on non-anomalous circumflex arteries.
Results:
In 9 anomalous cases, the circumflex arose from the left coronary cusp, in 7 cases from the right coronary cusp, and in the remaining 4 cases from the proximal right coronary artery. There were no differences in demographics or pattern or severity of coronary disease between the 2 groups. A higher proportion of patients with anomalous vessels presented acutely. Screening times were longer in the anomalous group. All 20 procedures were associated with immediate procedural success. There was one peri-procedural myocardial infarction unrelated to anomalous circumflex intervention. After a median follow-up period of 7.3 months, the only major adverse cardiac event recorded in the anomalous group was an ischaemia-driven revascularisation to a non-target vessel branch. We describe techniques which can be used to improve support and facilitate successful PCI to anomalous circumflex vessels.
Conclusion:
PCI to anomalous circumflex vessels may be technically challenging, but is feasible and carries favourable short and long-term clinical outcomes.
Summary:
This single centre observational study demonstrates that percutaneous coronary intervention to anomalous circumflex coronary arteries although technically challenging can be performed with satisfactory procedural success rates and favourable short and longer-term clinical outcomes. It describes various techniques that can be employed to optimise successful intervention.
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