Title:Morphological Correlation between the Diameters of the Left Main Coronary
Artery and its Branches Measured by QCA and Derived by Finet’s Law
Volume: 20
Author(s): Assad Ali Rezigalla*
Affiliation:
- Department of Basic Medical Sciences, College of Medicine, University of Bisha, Bisha 61922. P.O Box 551, Bisha, Saudi Arabia
Keywords:
Morphological correlation, Diameters, Coronary artery, QCA, Finet’s law, Angioplasty.
Abstract:
Background:
Coronary artery diseases are the leading cause of death worldwide. Stenting or angioplasty of coronary arteries as interventional management
requires knowledge about the morphology of the coronary tree, including luminal diameters.
Objective:
This work aimed to study the diameters of the left main coronary artery and its branches measured by QCA in relation to the diameters derived by
Finet’s law.
Methods:
This was a cross-sectional, retrospective, hospital-based study. The number of angiograms used was 357. The diameters of the left main coronary
artery (LM1), left anterior interventricular artery (LAD1), and left circumflex artery (LCx1) were measured by QCA. The diameter of LM1 was
measured by 5 mm before its termination, and the diameters of LAD1 and LCx1 were obtained by 5 mm from their origins. Finet’s law was used to
calculate the diameters of LM2, LAD2 and LCx2 using the QCA measurements.
Results:
The mean age of participants was 53.3±8.8 years. Female patients represented 58.9%. The mean diameter of the left main coronary using QCA was
3.75±0.85 mm, and the diameter calculated using Finet’s law was 3.89±0.80 mm. The diameters of LAD1 and LCx1 were larger than those
calculated with Finet’s law. The Z-test showed a significant difference between the diameter of the LM1 calculated by Finet’s law; both diameters
were positively associated. The diameters of LAD1 and LAD2 showed a non-significant correlation (r = 0.0653, P = 0.259526) and a negative
correlation between LCx1 and LCX2 (r = -0.2659, P = 0.00001). The Z-test showed a significant difference in the diameter of LAD and LCx
measured by QCA and Finet’s law.
Conclusion:
An association was found between the diameter of LM measured by QCA and calculated with Finet’s law; the diameter calculated by Finet’s law
was larger. The diameters of LAD and LCx measured by QCA were larger than those calculated by Finet’s law. A positive correlation existed
between the diameters measured by QCA and Finet’s law, and they had significant differences. Finet’s law can assist in the selection of stent size.
Despite the literature about Finet’s law, generalising its use requires more studies on different ethnicities.
