Guidelines for the Echocardiographic Assessment of Atrial Septal Defect and Patent Foramen Ovale: From the American Society of Echocardiography and Society for Cardiac Angiography and Interventions
J Am Soc Echocardiogr. 2015 Aug;28(8):910-58.
doi: 10.1016/j.echo.2015.05.015.