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The Nakata Index and Mcgoon Ratio: Correlation With the Severity of Pulmonary Regurgitation After the Repair of Paediatric Tetralogy of Fallot Publisher



Abbaszadeh R1 ; Askarimoghadam R1 ; Moradian M1 ; Mortazaeian H1 ; Qomi MRS2 ; Omidi N3 ; Khalili Y1 ; Tahouri T4
Authors
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Authors Affiliations
  1. 1. Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Paediatrics, Arak University of Medical Science, Arak, Iran
  3. 3. Cardiac primary Prevention Research Center, Cardiovascular Disease Research Institute, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Shahid Modarres Educational Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: Egyptian Heart Journal Published:2023


Abstract

Background: Pulmonary regurgitation is the most common complication after the complete repair of tetralogy of Fallot, and severe pulmonary regurgitation after surgery requires pulmonary valve replacement. In this retrospective observational, cross-sectional study, we included a total of 56 children aged 6 years or younger who underwent complete repair of TOF at Shahid Rajaei Cardiovascular Medical and Research Center in Tehran, Iran. Preoperative dual-source computed tomography was used to measure the McGoon ratio and Nakata index. The patients were divided into two groups based on the severity of postoperative pulmonary regurgitation, as estimated by trans-thoracic echocardiography: the severe pulmonary regurgitation group and the non-severe pulmonary regurgitation group. The McGoon ratio and Nakata index were then compared between the two groups. Results: When comparing the two groups, we found that the corrected right pulmonary artery diameter, main pulmonary artery diameter, and McGoon ratio in the non-severe pulmonary regurgitation group were higher than in the severe pulmonary regurgitation group. However, none of these differences were statistically significant. Additionally, other variables, including the corrected left pulmonary artery diameter and Nakata index, showed higher measurements in children with severe pulmonary regurgitation, but again, the differences were not statistically significant. Conclusions: This study indicates that pulmonary arteries diameter, Nakata index, and McGoon ratio were not significantly correlated with the severity of pulmonary regurgitation after the complete repair of tetralogy of Fallot. © 2023, The Author(s).