Computed tomographic myocardial mass compared with invasive myocardial perfusion measurement

Daniëlle C J Keulards (Corresponding author), Stephane Fournier, Marcel van 't Veer, Iginio Colaiori, Jo M Zelis, Mohamed El Farissi, Frederik M Zimmermann, Carlos Collet, Bernard De Bruyne, Nico H J Pijls

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

OBJECTIVE: The prognostic importance of a coronary stenosis depends on its functional severity and its depending myocardial mass. Functional severity can be assessed by fractional flow reserve (FFR), estimated non-invasively by a specific validated CT algorithm (FFRCT). Calculation of myocardial mass at risk by that same set of CT data (CTmass), however, has not been prospectively validated so far. The aim of the present study was to compare relative territorial-based CTmass assessment with relative flow distribution, which is closely linked to true myocardial mass.

METHODS: In this exploratory study, 35 patients with (near) normal coronary arteries underwent CT scanning for computed flow-based CTmass assessment and underwent invasive myocardial perfusion measurement in all 3 major coronary arteries by continuous thermodilution. Next, the mass and flows were calculated as relative percentages of total mass and perfusion.

RESULTS: The mean difference between CTmass per territory and invasively measured myocardial perfusion, both expressed as percentage of total mass and perfusion, was 5.3±6.2% for the left anterior descending territory, -2.0±7.4% for the left circumflex territory and -3.2±3.4% for the right coronary artery territory. The intraclass correlation between the two techniques was 0.90.

CONCLUSIONS: Our study shows a close relationship between the relative mass of the perfusion territory calculated by the specific CT algorithm and invasively measured myocardial perfusion. As such, these data support the use of CTmass to estimate territorial myocardium-at-risk in proximal coronary arteries.

Original languageEnglish
Pages (from-to)1489-1494
Number of pages6
JournalHeart
Volume106
Issue number19
Early online date29 May 2020
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Cardiac catheterisation and angiography
  • cardiac computed tomographic (CT) imaging

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