Pressure half time <200m/s is indicative of:
Correct answer: c) Severe AR
Other echocardiographic features of severe aortic regurgitation (AR) would be large regurgitant jets in case of a central jet (variable with eccentric jets), dense continuous wave (CW) signal of the regurgitant jet, holodiastolic flow reversal in descending aorta with an end diastolic velocity above 20 cm/s, regurgitant volume of 60 ml or more, effective regurgitant orifice area of 30 sq mm or more and a dilated left ventricle.
Other conditions which can shorten the pressure half time of aortic regurgitation jet are:
- Increase in left ventricular diastolic pressure
- Vasodilator therapy
- Dilated and compliant aorta
Pressure half time can be lengthened in chronic aortic regurgitation.
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