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- Yanick Baribeau, Daawar Chaudhry, Aidan Sharkey, Omar Chaudhary, Louis Chu, and Feroze Mahmood.
- From the Departments of Anesthesia, Critical Care and Pain Medicine.
- A A Pract. 2019 Dec 15; 13 (12): 457-460.
AbstractThe angle correction feature in ultrasound systems is used when there is difficulty accurately aligning the Doppler beam with the flow to be interrogated. The operator can manually "correct" the angle to the actual direction of flow. Subsequently, the machine corrects the peak velocity for the angle. We present a case of aortic valve replacement (AVR) in which falsely high transaortic gradients were obtained immediately after separation from cardiopulmonary bypass (CPB). We recommend that there be a more prominent notification when the angle correction feature is used with machine prompts confirming when a peak velocity is obtained using angle correction.
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