AR jet with wrap around (aliasing)

AR jet with wrap around (aliasing)

AR-jet
AR jet with wrap around (aliasing)

Continuous wave Doppler recording showing aortic regurgitation (AR) jet (above the baseline) with a cut off at the upper end and a wrap around seen below the baseline. Here the aliasing is seen because the limit has been set just above 200 cm/second while the velocity is higher than that. The tracing can be depicted upwards to its full extend by adjusting the velocity limit or by adjusting the baseline downwards. The dense jet seen below the baseline is the forward aortic flow. The peak forward gradient is measured as 20 mm Hg, which does not indicate significant associated aortic stenosis. The inset above shows the 2-D picture and the Doppler line passing through the aortic valve. RV: right ventricle; LV: left ventricle; LA: left atrium. Aortic forward flow is depicted downwards as the transducer is kept at the apex and hence the flow is away from the transducer. If the transducer is kept at the suprasternal notch, the aortic forward flow will be depicted upwards. Please note that the aortic regurgitation jet is not as dense as the aortic forward flow. This indicates that the aortic regurgitation is not severe. Even though the murmur of aortic regurgitation is mostly early diastolic, the Doppler flow tracing is pan diastolic.

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