Sr. No. Indices Description
Preoperative Preoperative Preoperative
1
Pulmonary Vein Index (PVI)
Designed to determine the predictive value of PVI for early outcomes among surgical treatment of TOF patients. PVI = LPV − A + RPV – A / Body Surface Area (BSA) (m2) /mm2/m2 The area of the Pas is measured at the proximal point of the first branch. The area of the PVs (LPV-A, RPV-A) is measured 3 mm. beyond the pulmonary venous ostium.
2
McGoon Ratio
This is the sum of diameters of immediately prebranching left and right pulmonary arteries to descending aorta just above the level of the diaphragm. - Normal value more than 2 to 2.5.