Quantitative assessment of myocardial blood flow in coronary artery disease by cardiovascular magnetic resonance: comparison of Fermi and distributed parameter modeling against invasive methods.
Mathematical modeling of perfusion cardiovascular magnetic resonance (CMR) data allows absolute quantification of myocardial blood flow and can potentially improve the diagnosis and prognostication of obstructive coronary artery disease (CAD), against the current clinical standard of visual assessments. This study compares the diagnostic performance of distributed parameter modeling (DP) against the standard Fermi model, for the detection of obstructive CAD, in per vessel against per patient analysis.



A pilot cohort of 28 subjects (24 included in the final analysis) with known or suspected CAD underwent adenosine stress-rest perfusion CMR at 3T. Data were analysed using Fermi and DP modeling against invasive coronary angiography and fractional flow reserve, acquired in all subjects. Obstructive CAD was defined as luminal stenosis of ≥70 % alone, or luminal stenosis ≥50 % and fractional flow reserve ≤0.80.



On ROC analysis, DP modeling outperformed the standard Fermi model, in per vessel and per patient analysis. In per patient analysis, DP modeling-derived myocardial blood flow at stress demonstrated the highest sensitivity and specificity (0.96, 0.92) in detecting obstructive CAD, against Fermi modeling (0.78, 0.88) and visual assessments (0.79, 0.88), respectively.



DP modeling demonstrated consistently increased diagnostic performance against Fermi modeling and showed that it may have merit for stratifying patients with at least one vessel with obstructive CAD.







Clinicaltrials.gov NCT01368237 Registered 6 of June 2011. URL: https://clinicaltrials.gov/ct2/show/NCT01368237.
Clinical Research Imaging Centre, University of Edinburgh, Edinburgh, UK. gpapanas@ed.ac.uk.|Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK. gpapanas@ed.ac.uk.
Giorgos
0000-0002-8410-6958
G
Papanastasiou
Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
Michelle C
MC
Williams
Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
Marc R
MR
Dweck
Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
Shirjel
S
Alam
Clinical Research Imaging Centre, University of Edinburgh, Edinburgh, UK.
Annette
A
Cooper
Clinical Research Imaging Centre, University of Edinburgh, Edinburgh, UK.
Saeed
S
Mirsadraee
Clinical Research Imaging Centre, University of Edinburgh, Edinburgh, UK.|Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
David E
DE
Newby
Clinical Research Imaging Centre, University of Edinburgh, Edinburgh, UK.|Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK.
Scott I
SI
Semple
D000241:Adenosine / Q000008:administration & dosage; D000368:Aged; D019540:Area Under Curve; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology; D003326:Coronary Circulation; D023921:Coronary Stenosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D005240:Feasibility Studies; D005260:Female; D053805:Fractional Flow Reserve, Myocardial; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D008875:Middle Aged; D008955:Models, Cardiovascular; D055414:Myocardial Perfusion Imaging / Q000379:methods*; D066230:Patient-Specific Modeling; D010865:Pilot Projects; D011237:Predictive Value of Tests; D012372:ROC Curve; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D014665:Vasodilator Agents / Q000008:administration & dosage
D014665:Vasodilator Agents; D000241:Adenosine
Cardiovascular magnetic resonance; Distributed parameter modeling; Fermi modeling; Invasive methods; Myocardial blood flow