Atrial septal defect left-to-right shunt
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Claudia Hochberg, M.D.
Associate Editors-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Keri Shafer, M.D. [3]; Priyamvada Singh, MBBS [[4]]
Assistant Editor-In-Chief: Kristin Feeney, B.S. [[5]]
=Atrial septal defect Left-to-Right Shunting
A left-to-right shunt is a cardiac shunt which allows, or is designed to cause, blood to flow from the left heart to the right heart. This occurs when:
- there is an opening or passage between the atria, ventricles, and/or great vessels; and,
- left heart pressure is higher than right heart pressure and/or the shunt has a one-way valvular opening.
