Accuracy of doppler echocardiography in quantification of left to right shunts in adult patients with atrial septal defect

In previous experimental and pediatrie studies, the ratio of pulmonary to systemic flow (QpQs) was accurately estimated by Doppler echocardiography in various cardiac shunt lesions. The purpose of this study was to assess the accuracy of pulsed Doppler echocardiography in determining the magnitude of shunt flow in adult patients with an ostium secundum type atrial septal defect.