Aortic regurgitation calculator: continuity method
Explore the continuity method for aortic regurgitation, with explicit measurement units and the tool’s source context.
Method
RVol = LVOT SV − mitral SV
Use the measurement units shown below. Some fields apply only to a selected method or condition; follow the interactive tool’s method choices. The interactive tool keeps missing measurements incomplete and provides its method-specific results and reference context.
Measurements and acquisition
LVOT diameter cm
2D echo · inner-edge measurement
- Use the specified view and cardiac phase.
- Align the calipers perpendicular to the structure’s long axis.
- Measure inner edge to inner edge and avoid oblique foreshortening.
LVOT VTI cm
Pulsed-wave Doppler
- Place the sample volume at the specified annulus or outflow tract.
- Align the Doppler beam with flow and record a clean envelope.
- Trace the modal velocity envelope and use the reported VTI.
Mitral annulus diameter cm
2D echo · inner-edge measurement
- Use the specified view and cardiac phase.
- Align the calipers perpendicular to the structure’s long axis.
- Measure inner edge to inner edge and avoid oblique foreshortening.
Mitral annulus VTI cm
Pulsed-wave Doppler
- Place the sample volume at the specified annulus or outflow tract.
- Align the Doppler beam with flow and record a clean envelope.
- Trace the modal velocity envelope and use the reported VTI.
AR jet VTI cm
Continuous-wave Doppler trace
- Use the same aligned CW recording as the peak velocity.
- Trace the outer edge of the dense envelope for the relevant phase.
- Use the machine-reported VTI in centimeters.
Sources and method context
American Society of Echocardiography · 2017 · Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation · Quantitative flow method pp. 7–8 · AR Table 10 pp. 35–37 · Table 11 p. 38 · integrative pathway pp. 41–42
- Flow calculation · Quantitative pulsed-Doppler method pp. 7–8 · AR Table 10 p. 37
Aortic regurgitant volume as LVOT stroke volume minus competent reference stroke volume, with EROA from regurgitant volume divided by AR VTI.
- Acquisition & exclusions · Table 10 · PDF p. 37
LVOT diameter and PW sampling, mitral annulus measurement in mid-diastole with diastolic annular PW Doppler, measurement-error sensitivity, and invalidity with combined important MR unless a pulmonic reference is used.
- Quantitative grades & integration · Table 11 p. 38 · integrative approach pp. 41–42
Four quantitative AR bands and the requirement to reconcile quantitative results with the complete anatomic, color, Doppler, and LV response assessment.
Catalogue review status: Exact guideline locator mapped · clinical sign-off pending
These pages describe the educational tool. Interpret measurements with the complete clinical context and the method’s acquisition limitations.
Keep exploring
- Parasternal long axis acquisition guide · Open in Probe Lab
- Apical four chamber acquisition guide · Open in Probe Lab
- Apical two chamber acquisition guide · Open in Probe Lab
- Apical five chamber acquisition guide · Open in Probe Lab
- Aortic regurgitation PISA calculator
- Mitral regurgitation PISA calculator: EROA and regurgitant volume
- Mitral regurgitation calculator: continuity method
- Tricuspid regurgitation calculator: PISA quantification