Shunt Fraction (Invasive)
*If a pulmonary vein has not been entered the arterial saturation (SAO2) may be substituted, provided that there is no right to left shunt.
The magnitude of an inra- or extracardiac shunt can be estimated by flow ratio between the pulmonary and systemic circulation (Qp/Qs) using hemodynamic data.
Consideration should be made to close shunts with flow rates > 1.5 if no contraindications exist.
- [1]Sanders SP et al.: Measurement of systemic and pulmonary blood flow and QP/QS ratio using Doppler and two-dimensional echocardiography.American Journal of Cardiology 1983 March 15, 51 (6): 952-6
- [2]Oh J, Seward JB, Tajik AJ.: Note to self: we need to find and upload this file.
- [3]Kern MJ.: The Cardiac Catheterization Handbook 4th Edition. Mosby 2003
Results
Real-time automated computation
*If a pulmonary vein has not been entered the arterial saturation (SAO2) may be substituted, provided that there is no right to left shunt.
The magnitude of an inra- or extracardiac shunt can be estimated by flow ratio between the pulmonary and systemic circulation (Qp/Qs) using hemodynamic data.
Consideration should be made to close shunts with flow rates > 1.5 if no contraindications exist.
- [1]Sanders SP et al.: Measurement of systemic and pulmonary blood flow and QP/QS ratio using Doppler and two-dimensional echocardiography.American Journal of Cardiology 1983 March 15, 51 (6): 952-6
- [2]Oh J, Seward JB, Tajik AJ.: Note to self: we need to find and upload this file.
- [3]Kern MJ.: The Cardiac Catheterization Handbook 4th Edition. Mosby 2003