Patent ductus arteriosus echocardiography

Patent Ductus Arteriosus Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Associate Editor-In-Chief:Cafer Zorkun, M.D., Ph.D. [2]; Eli V. Gelfand, MD; Keri Shafer, M.D. [3] Priyamvada Singh, MBBS [[4]]

Assistant Editor-In-Chief: Kristin Feeney, B.S. [[5]]

Echocardiogram

Echocardiographic techniques in PDA

In the adult, doppler can be used to visualize the shunt from the aorta to the left pulmonary artery. PDAs can be seen on:

• Suprasternal view
• High pasasternal short-axis view: aim probe leftward/superior
• Transesophageal echocardiogram (often needed in adults to accurately visualize a PDA)

Echo functions in PDA

• Estimate the magnitude of the shunt
• Degree of left ventricular and left atrial dilation
• Calculation of the peak pressure gradient in the PDA can be calculated with the modified Bernoulli equation
• Associated anomalities

The PDA can usually be visualized on two-dimensional echocardiography, showing left atrial (LA) and left ventricular (LV) enlargement. It can also be assessed by doppler and color flow imaging, establishing the diagnosis and distension of a small nonpulmonary hypertensive ductus from a coronary arteriovenous fistula to the pulmonary artery. Doppler shows the presence of a continuous flow into the left PA and main PA trunk. The maximun acceleration of the blood flow is in latter systole and early diastole.

Useful Links: Yale Congenital Heart Disease: PDA