FINDING THE ANATOMICAL VARIATIONS IN SUBJECTS UNDERGOING DIAGNOSTIC CARDIAC CATHETERIZATION FOR TERATOLOGY OF FALLOT

Abstract

Background: The teratology of Fallot has been associated with different anatomical variations and associations which have 
vital applications in surgical outcomes and management. 
Aim: The present study was aimed for analyzation of different anatomical variations in subjects with Teratology of Fallot 
encountered during diagnostic cardiac catheterization. 
Method: The present study assessed 262 subjects who presented with Teratology of Fallot and underwent diagnostic cardiac 
catheterization before complete correction. Nakata index, Mc goon ratio, and z scores for branch pulmonary arteries and 
pulmonary artery annulus were assessed. Study subjects were divided into 2 groups based on age with Group I having subjects 
<10 years and Group II having subjects ≥10 years to assess difference in anatomy.  
Results: The mean of study subjects in the study group was 6.1±4.5 years and there were 69.4% of males in the study group. 
The most common anomaly associated was MAPCAS (major aortopulmonary collaterals) seen in 41.9% (n=110) subjects 
followed by right aortic arch seen in 22.9% (n=60) study subjects. The mean Nakata index and Mc goon ratio were 
263.34±136.12mm2 and 1.64±0.43 respectively. A higher incidence of MAPCAS was seen in Group II with 75.7%. 
Conclusions: The present study concludes that anatomical variations seen in subjects with Teratology of Fallot show no 
variations with age except for a higher prevalence of MAPCAS in older child subjects. Also, the most common anomaly 
associated being MAPCAS.