Aortic Regurgitation (AR) Quantification by Volumetric Method

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Data Acquisition

LV Stroke volume

MV stroke volume

Reference Values

Aortic Regurgitation Severity
RV, mL/beat< 3030-4445-59≥ 60
RF, %< 3030-3940-49≥ 50
EROA, cm2< 0.100.10-0.190.20-0.29≥ 0.30


Algorithm for the integration of multiple parameters of aortic regurgitation severity1

Aortic regurgitation algorithm

Good-quality echocardiographic imaging and complete data acquisition are assumed. If imaging is technically difficult, consider TEE or CMR. AR severity may be indeterminate due to poor image quality, technical issues with data, internal inconsistency among echo findings, or discordance with clinical findings. PHT, Pressure half-time.


\[SV_{LV} = \pi  (\frac{LVOT\hspace{0.1cm}∅}{2})^2 \times VTI_{LVOT}\]



\[SV_{MV} = \pi (\frac{Mitral\hspace{0.1cm}Annulus\hspace{0.1cm}∅}{2})^2 \times  VTI_{MV}\]

\[AR\hspace{0.1cm}RV = SV_{LV} – SV_{MV}\]

\[AR\hspace{0.1cm}RF = \frac{RV}{SV_{LV}} \times  100\]


LVLeft ventricle
LVEDVLeft ventricular end-diastolic volume
LVESVLeft ventricular end-systolic volume
VTIVelocity-time integral
LVOTLeft ventricular outflow tract diameter
MVMitral valve
AAortic regurgitation
SVStroke volume
RVRegurgitant volume
RFRegurgitant fraction


1.Zoghbi WA, et al. Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation. A Report from the American Society of Echocardiography Developed in Collaboration with the Society for Cardiovascular Magnetic Resonance. J Am Soc Echocardiogr. 2017 Apr;30(4):303-371. Full text


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Developer & Illustrator: Sirikarn Napan, MD, FACC