{
  "abstract": "Introduction: Technical failure during chronic total occlusion (CTO) percutaneous coronary intervention (PCI) is usually reported as a binary outcome, although failed procedures may follow different procedural courses.\n\nAim: To describe procedural patterns of technical failure during CTO PCI and assess their association with conventional CTO complexity scores.\n\nMaterial and methods: We analyzed 2,375 CTO PCI procedures from a multicenter registry. Technical failure was classified as Pattern A (crossing- or device-delivery failure) or Pattern B (dissection- or flow-related failure). Multivariable logistic regression was used to examine correlates of overall and pattern-specific failure.\n\nResults: Technical failure occurred in 192 (8.1%) procedures: 148 (77.1%) were Pattern A and 44 (22.9%) were Pattern B. J-CTO and CASTLE/EuroCTO scores were higher in Pattern A than in Pattern B. Overall technical failure was associated with blunt/absent proximal cap, CTO length ≥ 30 mm, moderate/severe calcification, previous coronary artery bypass grafting, and proximal tortuosity. In the exploratory Pattern B model, CTO length ≥ 30 mm, moderate/severe calcification, and left anterior descending versus right coronary artery target vessel were associated with Pattern B versus technical success. However, target vessel did not differentiate Pattern B from Pattern A after adjustment for J-CTO or CASTLE/EuroCTO score. Pattern B consisted mainly of persistent dissection and no/slow flow.\n\nConclusions: Technical failure during CTO PCI is heterogeneous. Conventional CTO complexity scores appeared to align more closely with crossing- or device-delivery failure, while dissection- or flow-related failure remained a smaller exploratory subgroup requiring external validation.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Cardiology, Necmettin Erbakan University, Konya, Turkey",
    "Toros University, Mersin, Turkey",
    "Department of Cardiology, Bakırkoy Dr. Sadi Konuk Training and Research Hospital, Istanbul, Turkey",
    "Istinye University, Istanbul, Turkey",
    "Cardiology Department, School of Medicine, Biruni University, Istanbul, Turkey"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Ahmet S. Gurbuz"
    },
    {
      "affs": [
        1
      ],
      "name": "Sefa Sural"
    },
    {
      "affs": [
        2
      ],
      "name": "Semi Ozturk"
    },
    {
      "affs": [
        3
      ],
      "name": "Vedat Aslan"
    },
    {
      "affs": [
        0
      ],
      "name": "Yakup Alsancak"
    },
    {
      "affs": [
        4
      ],
      "name": "Sevket Gorgulu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/68t1hg2fz38zn.bib",
  "cited_by": 0,
  "doi": "10.5114/aic.2026.164691",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13721054/?tool=EBI",
  "id": "68t1hg2fz38zn",
  "issns": [
    "1734-9338",
    "1897-4295"
  ],
  "landing_url": "https://europepmc.org/article/PMC/PMC13721054",
  "language": "eng",
  "licence": "CC-BY-NC-SA",
  "licence_label": "CC BY-NC-SA",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Original Paper"
    ],
    [
      "openalex",
      "2746|Coronary Interventions and Diagnostics"
    ]
  ],
  "openalex": "W7213306970",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13721054/pdf/?tool=EBI",
  "pmcid": "PMC13721054",
  "pmid": "42965010",
  "published": "2026-09-01",
  "publisher": "Termedia Publishing",
  "ris": "https://research.draconitic.com/paper/68t1hg2fz38zn.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:21:37Z",
      "native_id": "PMC:PMC13721054",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13721054"
    },
    {
      "first_seen": "2026-11-03T12:21:48Z",
      "native_id": "PMC13721054",
      "source": "pmc",
      "url": "https://doi.org/10.5114/aic.2026.164691"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2746|Coronary Interventions and Diagnostics",
      "subfield": "surgery"
    }
  ],
  "title": "Technical failure patterns during chronic total occlusion percutaneous coronary intervention: a multicenter registry analysis",
  "title_text": "Technical failure patterns during chronic total occlusion percutaneous coronary intervention: a multicenter registry analysis",
  "type": "peer-reviewed",
  "updated_at": "2026-11-03T12:21:48Z",
  "url": "https://research.draconitic.com/paper/68t1hg2fz38zn",
  "venue": "Postepy w kardiologii interwencyjnej = Advances in interventional cardiology",
  "versions": []
}