What is the commonly used imaging technique to assess blood flow in suspected congenital heart defects?

Doppler ultrasound is the preferred imaging technique for assessing blood flow in cases of suspected congenital heart defects due to its ability to provide real-time information about blood flow and direction. This method utilizes sound waves to measure the velocity of blood flow through the heart and major blood vessels, which is crucial for identifying abnormalities in the circulatory system. It can effectively reveal not only structural defects but also functional aspects, such as the severity of any obstruction or regurgitation within the heart.

In pediatric patients, Doppler ultrasound is particularly advantageous because it is non-invasive, does not involve radiation, and can be performed at the bedside, making it a practical choice for evaluating children who may have difficulty undergoing other imaging studies. The visualization capabilities of Doppler ultrasound, combined with color flow mapping, allow for a comprehensive assessment of hemodynamics, which is essential in the diagnosis and management of congenital heart defects.