Patent ductus arteriosus echocardiography: Difference between revisions
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==Echocardiogram== | ==Echocardiogram== | ||
=== | ===Techniques=== | ||
In the adult, doppler can be used to visualize the shunt from the aorta to the left pulmonary artery. | In the adult, doppler can be used to visualize the shunt from the aorta to the left pulmonary artery. | ||
PDAs can be seen on: | PDAs can be seen on: | ||
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* Transesophageal echocardiogram (often needed in adults to accurately visualize a PDA) | * Transesophageal echocardiogram (often needed in adults to accurately visualize a PDA) | ||
=== | ===Functions=== | ||
* Estimate the magnitude of the shunt | * Estimate the magnitude of the shunt | ||
* Degree of left ventricular and left atrial dilation | * Degree of left ventricular and left atrial dilation | ||
Revision as of 18:17, 14 July 2011
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Patent Ductus Arteriosus Microchapters |
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Differentiating Patent Ductus Arteriosus from other Diseases |
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Diagnosis |
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Treatment |
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Medical Therapy |
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Case Studies |
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Patent ductus arteriosus echocardiography On the Web |
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American Roentgen Ray Society Images of Patent ductus arteriosus echocardiography |
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Risk calculators and risk factors for Patent ductus arteriosus echocardiography |
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
Techniques
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)
Functions
- 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