Volume 24, Issue 103, May - June, 2020

The Validity of different equations for prediction of left main coronary artery diameter as predicted from the diameters of its branch vessels using conventional and computed tomography coronary angiograms

Mahrous H, Al-Hosary H, Kandil H, Elkaffas S

Cardiovascular medicine department, Cairo University, Egypt

ABSTRACT

Aim: Prediction of the normal diameter of the left main coronary artery (LMCA) is particularly important in its percutaneous coronary intervention (PCI). The objective of this study is to evaluate the four equations (i.e., Murray, Finet, area-preservation (AP) and HK) that express a diameter relationship between the three segments of arterial bifurcation for prediction of LMCA diameter from the diameters of its branch vessels. Methods: The four models were compared to the observed measurements of the LMCA bifurcation from 100 patients with normal computed tomography coronary angiograms (CTCA) and another 30 patients with normal conventional coronary angiographies. Results: All the four models were valid for prediction of LMCA diameter from diameters of its branch vessels. Murray equation was the most accurate in that prediction in CTCA (2.9 % error) and AP equation was the most accurate in that prediction in conventional coronary angiography. HK and Finet models were comparable and provide a relatively accurate prediction of LMCA diameter using both techniques. Conclusions: HK and Finet models provide a comprehensive rule for percutaneous reconstruction of LMCA in both conventional and computed tomography coronary angiograms.

Keywords: left main coronary artery, bifurcation diameter relationship, diameter ratio, multislice computed tomography coronary angiography

Medical Science, 2020, 24(103), 1222-1229

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