Shunt Fraction (Echo)
The magnitude of an inra- or extracardiac shunt can be estimated by flow ratio between the pulmonary and systemic circulation (Qp/Qs) using echocardiography. It is important to remember that the systemic flow cannot be estimated using the LVOT if there is moderate to severe aortic insufficiency.
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.: The Echo Manual 3rd edition. Lippincott, Williams, Wilkins. 2007
- [3]Kern MJ.: American Journal of Cardiology 1983 March 15, 51 (6): 952-6
Results
Real-time automated computation
The magnitude of an inra- or extracardiac shunt can be estimated by flow ratio between the pulmonary and systemic circulation (Qp/Qs) using echocardiography. It is important to remember that the systemic flow cannot be estimated using the LVOT if there is moderate to severe aortic insufficiency.
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.: The Echo Manual 3rd edition. Lippincott, Williams, Wilkins. 2007
- [3]Kern MJ.: American Journal of Cardiology 1983 March 15, 51 (6): 952-6