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Pressure half time in AR – Cardiology MCQ – Answer

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:

  1. Increase in left ventricular diastolic pressure
  2. Vasodilator therapy
  3. Dilated and compliant aorta

Pressure half time can be lengthened in chronic aortic regurgitation.

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MCQs in Medicine - Cardiovascular System is based on undergraduate medical curriculum. Though the questions are aimed at basic post graduate entrance examinations, candidates taking competitive exams at the post graduate exit level may also find them useful, especially the explanations for the answers. Undergraduate medical students will find them useful for answering MCQ tests in their regular exams. More than just answering MCQs, the explanations will improve the knowledge and understanding about the conditions discussed.Medicine MCQs - Cardiovascular System Kindle Edition: Click Here for a Preview Comments and suggestions are most welcome.