Abstract
In humans, the most common anatomic variation of the left main (LM) stem is represented by its distal division in 3 branches (LM trifurcation) instead of 2. LM trifurcation disease accounts for ≈10% to 15% of all LM diseases and is often managed by cardiac surgery. Over the last decades, due to the improvement of interventional material and techniques, percutaneous coronary intervention started gaining acceptance to treat patients with LM disease including those with trifurcated anatomy. Yet, LM trifurcation stenosis with its intrinsic anatomic complexity (3 branches, at least 4 angles, wide variability in branch size and disease) is recognized as a challenging lesion subset for percutaneous coronary intervention. In this review, we summarize available data about LM trifurcation anatomy, its influence on percutaneous coronary intervention feasibility, and the evidence collected regarding the different technical options (including trissing balloon inflation).
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