Iqbal Hussain Pathan, Sohail Khan Bangash, Amin Muhammad Khawaja.
Great artery ratio: does it really matters in total correction of Tetralogy of Fallot.
Pak Heart J Jan ;50(2):100-4.

Objective: To investigate the significance of Great artery ratio, for decision of right ventricular outflow tract management in patients with Tetralogy Of Fallot. Methodology: A retrospective cross sectional study including surgical record of patients operated for total correction of Tetralogy Of Fallot from January 2015 to December 2015 in Department of Paediatric cardiac surgery NICVD, was done.Patients whose aortic annuals were documented in record were included in study. A relation of great artery ratio with cut off value of 0.55 with Trans Annular Patch Enlargement Repair and patient outcome as defined by time of extubation lesser or greater than six hours and survival after surgery was evaluated. Data was analysis on SPSS 21. Results: Of total 66 patients, male were 66.7%. Great artery ratio of 0.55 or less was calculated in 39.4% of patients, while trans annular patch enlargement repair of Tetralogy Of Fallot (TOF) was observed in 15% of patients with 6 patients in GA ratio 0.55 or less required trans annular patch enlargement compared to 4 patients in GA ratio of >0.55( p=0.14 ). However a significant association of mortality was observed with 15.4% of patients expired in group with low GA Ratio compared to no mortalities in patients with GA ratio of >0.55 (p<0.05). Conclusion: Although Trans annular patch enlargement with low GA ratio was required in very few patients but it was associated with decreased survival.

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