Atrial septal defect doppler

Atrial Septal Defect Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Priyamvada Singh, M.B.B.S. [2], Cafer Zorkun, M.D., Ph.D. [3]; Assistant Editor(s)-In-Chief: Kristin Feeney, B.S. [4]

Doppler

• Used to demonstrate left to right flow.
• Effective modality for:

• Confirmation of a suspected atrial septal defect
• Estimation of the defect size
• Determination of the universal direction of flow across the septum
• Determination of the usage of percutaneous closure and surgical therapies
• Determination of high velocity flow, useful in patients with restrictive defects, obstructed pulmonary venous return and/or left atrial hypertension

Disadvantages

• May show false positive shunting as caval flow and incorrectly set gain may appear as left to right flow.
• Coloring across the interatrial septum can distort the perception of the shunt flow
• Not effective in determination of sinus venosus defects