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Cardiac Imaging and Diagnostics / Cerebrovascular and Carotid Artery Diseases · Journal article
Frontiers in Cardiovascular Medicine · August 27, 2026
A consensus or society position rather than new primary data.
This clinical review proposes that side branch ballooning in coronary bifurcation PCI should be applied selectively on the basis of physiology and intracoronary imaging rather than angiographic appearance alone. It marshals evidence from mechanistic reasoning, randomized trials (SMART-STRATEGY, EBC MAIN, DEFINITION II), and imaging-guided intervention studies (OCTOBER, RENOVATE-COMPLEX-PCI) to argue that carina shift rather than plaque shift is often the dominant driver of ostial side branch compromise, and that when the side branch requires treatment, drug-coated balloons outperform plain balloon angioplasty.
Clinical review and evidence synthesis. Patients with coronary bifurcation lesions undergoing percutaneous coronary intervention; included trials span varying complexity from less-complex left-main bifurcations (EBC MAIN) to DEFINITION-complex subsets (DEFINITION II).. Intervention: Selective, imaging- and physiology-guided side branch ballooning; proximal optimization technique; kissing-balloon inflation; drug-coated balloon for compromised side branches.. Compared with: Routine, angiography-guided side branch ballooning; aggressive versus conservative side branch intervention strategies (SMART-STRATEGY); stepwise provisional versus systematic two-stent treatment (EBC MAIN); plain (uncoated) balloon angiop….
SMART-STRATEGY: conservative side branch approach associated with 3-year target-vessel failure of 11.7% vs. 20.8% in aggressive approach, with less periprocedural injury (single-centre, borderline-significant) EBC MAIN found no significant difference between stepwise provisional and systematic two-stent treatment in less-complex left-main bifurcations, supporting stepwise provisional stenting as default DEFINITION II: planned two-stent strategy reduced target-lesion failure in complex bifurcations meeting DEFINITION criteria
2025 meta-analysis of drug-coated balloon use: pooled odds ratio for major adverse cardiac events 0.48 versus plain balloon angioplasty in compromised side branches
Clinicians should consider adopting physiology and imaging-guided rather than angiography-guided criteria for side branch ballooning, reserving it for anatomical subsets with demonstrated benefit. When side branch treatment is required, drug-coated balloons should be preferred over plain balloon angioplasty in appropriately selected cases.
A clinical review synthesizing mechanistic rationale, randomized trial evidence, and imaging data to propose a selective, physiology-guided framework for side branch ballooning in bifurcation PCI—positioned to inform practice rather than report a new trial result.
As stated by the source record.
Quoted from the source exactly as published.
Clinicians should consider adopting physiology and imaging-guided rather than angiography-guided criteria for side branch ballooning, reserving it for anatomical subsets with demonstrated benefit. When side branch treatment is required, drug-coated balloons should be preferred over plain balloon angioplasty in appropriately selected cases.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Coronary bifurcation lesions account for approximately 15%–20% of all percutaneous coronary interventions (PCI) and remain among the most technically demanding scenarios in interventional cardiology. Provisional stenting—stenting the main vessel and intervening on the side branch (SB) only when necessary—is the default strategy, yet SB ballooning's role remains contested and is frequently applied reflexively. This review advances a single, evidence-based argument: SB ballooning should be deployed selectively, governed by physiology and intracoronary imaging rather than angiographic appearance, and reserved for the anatomical subsets in which it confers genuine benefit. We marshal the supporting evidence along four lines. First, mechanism: carina shift, rather than plaque shift, is a frequent and often dominant contributor to ostial SB compromise and is generally well managed without routine ballooning. Second, randomized data on strategy: in SMART-STRATEGY a conservative SB approach did not worsen long-term outcomes relative to an aggressive one and was associated with lower 3-year target-vessel failure (11.7% vs. 20.8%; a modest, single-centre, borderline-significant trial), with less periprocedural injury; EBC MAIN found no significant difference between stepwise provisional and systematic two-stent treatment in less-complex left-main bifurcations, supporting stepwise provisional stenting as default, whereas a planned two-stent strategy reduced target-lesion failure in the more complex, DEFINITION-defined subset (DEFINITION II)—so these trials should not be conflated. Third, technique optimization under imaging: the proximal optimization technique and judicious kissing-balloon inflation refine the result, and intracoronary imaging improves procedural assessment, rewiring verification, balloon sizing and optimization, while randomized trials support the clinical benefit of imaging-guided PCI in complex lesions (OCTOBER for OCT-guided bifurcation PCI; RENOVATE-COMPLEX-PCI for imaging-guided complex PCI generally)—neither trial randomized distal-cell rewiring or side-branch ballooning itself. Fourth, the device decision when the SB must be treated: the DCB-BIF randomized trial and a 2025 meta-analysis (pooled odds ratio for major adverse cardiac events 0.48) show a drug-coated balloon is a promising, evidence-supported option outperforming plain (uncoated) balloon angioplasty in appropriately selected compromised side branches, not a default for every side branch requiring dilatation. Integrating these strands, we propose a practical, lesion- and physiology-specific framework and identify principal evidence gaps future trials should address.
Taken from the source record, never inferred. Follow any of these and new work involving them reaches your briefing.