What information about the ASD may be gained by Doppler examination?
What information about the ASD may be gained by Doppler examination?
The shunt fraction ( Qp/ Qs) can be determined by calculating the flow across the pulmonary and aortic valves (Qp and Qs, respectively). In addition, the pulmonary systolic pressure can be estimated from the tricuspid regurgitation jet using the modiļ¬ed Bernoulli equation.