Quantitative coronary computed tomography assessment for differentiating between total occlusions and severe stenoses

Shinichiro Masuda, Pruthvi C. Revaiah, Shigetaka Kageyama, Tsung Ying Tsai, Kotaro Miyashita, Akihiro Tobe, John D. Puskas, Ulf Teichgräber, Ulrich Schneider, Torsten Doenst, Kaoru Tanaka, Johan De Mey, Mark La Meir, Saima Mushtaq, Antonio L. Bartorelli, Giulio Pompilio, Scot Garg, Daniele Andreini, Yoshinobu Onuma, Patrick W. Serruys

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Backgrounds: The impact of quantitative assessment to differentiate total occlusions (TOs) from severe stenoses on coronary computed tomography angiography (CCTA) remains unknown. Objective: This study investigated whether quantitative characteristics assessed on CCTA could help differentiate a TO from a severe stenosis on invasive coronary angiography (ICA). Methods: This study is a sub-analysis of the FASTTRACK CABG (NCT04142021) in which both CCTA and ICA were routinely performed. Quantitative analysis was performed with semi-automated CCTA plaque-analysis software. Blinded analysts compared TOs on CCTA, defined as a complete lack of contrast opacification within the coronary occlusion, with corresponding ICA. Results: Eighty-four TOs were seen on CCTA in 59 of the 114 patients enrolled in the trial. The concordance in diagnosing a TO between ICA and CCTA was 56.0% (n ​= ​47). Compared to severe stenoses, TOs had a significantly longer lesion length (25.1 ​± ​23.0 ​mm vs 9.4 ​± ​11.2 ​mm, P ​< ​0.001). The best cut-off value to differentiate a TO from severe stenosis was a lesion length of 5.5 ​mm (area under the curve 0.77, 95% CI: 0.66–0.87), with a 91.1% sensitivity and 61.1% specificity. Dense calcium percentage atheroma volume (PAV) was significantly higher in TOs compared to severe stenoses (18.7 ​± ​19.6% vs. 6.6 ​± ​13.0%, P ​< ​0.001), whilst the opposite was seen for fibro-fatty PAV (31.3 ​± ​14.2% vs. 19.5 ​± ​10.5%, P ​< ​0.001). On a multivariable logistic regression analysis, lesion length (>5.5 ​mm) was the only parameter associated with differentiating a TO from a severe stenosis. Conclusion: In quantitative CCTA analysis, a lesion length >5.5 ​mm was the only independent predictor differentiating a TO from a severe stenosis. NCT registration number: NCT04142021.

Original languageEnglish
Pages (from-to)450-456
Number of pages7
JournalJournal of Cardiovascular Computed Tomography
Volume18
Issue number5
DOIs
StatePublished - 1 Sep 2024
Externally publishedYes

Keywords

  • Coronary computed tomography angiography
  • Discordance
  • Quantitative assessment
  • Severe stenosis
  • Total occlusion

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