1. Quantification of Ventricular Volume Load in the Context of a Bidirectional Cavopulmonary Shunt: A Theoretical Treatise 
Tjark Ebels, MD, PhD, Ymkje J. van Slooten, MD, Nynke J. Elzenga, MD, PhD, Tjalling W. Waterbolk, MD, Rolf M.F. Berger, MD, PhD 
The Annals of Thoracic Surgery 
Volume 93, Issue 6, Pages (June 2012)
DOI: /j.athoracsur
Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions

2. Fig. 1
Table to facilitate the calculation of Q˙v/Q˙ivc. Oxygen saturations measured in the Aorta (Sao), Pulmonary Veins (Spv) and Inferior Vena Cava (Sivc) are used to calculate the Q˙p/Q˙ivc ratio by (Sao − Sivc)/(Spv − Sao). The horizontal axis shows (Sao − Sivc). The vertical axis shows (Spv − Sao). At the intersection the corresponding Q˙v/Q˙ivc can be found considering that Q˙v = Q˙p + Q˙ivc thus Q˙v/Q˙ivc = Q˙p/Q˙ivc + 1. By repeating the measurements and calculations in two different situations the difference in Q˙v/Q˙ivc can be calculated.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2012 The Society of Thoracic Surgeons Terms and Conditions