Aortic stenosis gradient by Doppler echocardiogram

Aortic stenosis gradient by Doppler echocardiogram Inset shows apical five chamber view from which the aortic stenosis jet (AS Jet) is assessed using a continuous wave Doppler cursor. Aortic stenosis jet moves away from the transducer in this view and is displayed below the baseline. Velocity scale on the right side is in meters per second (m/s). Aortic regurgitation jet (AR Jet) is seen above the baseline as the regurgitant flow into the left ventricle is towards the transducer kept at the left ventricular apex. AV Vmax: maximum velocity of the aortic stenosis jet; AV V mean: mean velocity of the aortic stenosis jet; AV maxPG: maximum pressure gradient across the aortic valve; AV meanPG: mean pressure gradient across the aortic valve; AV VTI: velocity time integral across the aortic valve; AV Env.Ti: aortic valve envelope time (corresponds to the aortic ejection time); HR: heart rate. All gradients are measured in millimeters of mercury (mm Hg), velocities in meters per second (m/s) and heart rate in beats per minute (BPM). Envelope time is measured in milliseconds (ms) and velocity time integral in centimeters (cm). Severity of aortic stenosis by Doppler gradient Conventionally, aortic stenosis has been classified into mild (peak gradient up to 50 mm Hg), moderate (peak gradient between 50 –  75 mm Hg) and severe, with peak transvalvular pressure gradients above 75 mm Hg. But gradients depend on flow and low flow severe aortic stenosis with low gradients have been de...
Source: Cardiophile MD - Category: Cardiology Authors: Tags: Echocardiogram Library Source Type: blogs