Pulmonic regurgitation · continuity calculator
Explore pulmonic regurgitation · continuity with the method’s inputs, acquisition guidance and source references. Open the calculator to enter measurements or try an illustrative worked example.
Method
RVol = RVOT SV − LVOT SV; RF = RVol ÷ RVOT 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
RVOT 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.
RVOT 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.
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.
PR pressure half-time ms
CW Doppler deceleration slope · Optional
- Record a complete inflow or regurgitant CW envelope.
- Trace the deceleration slope using the machine PHT tool.
- Average representative beats and use additional beats in atrial fibrillation.
Sources and method context
American Society of Echocardiography · 2017 · Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation · PR acquisition and quantitation pp. 52–55 · Table 15 pp. 52–53 · Table 16 p. 56 · Figure 35 p. 57
- Continuity calculation & acquisition · PR section pp. 52–55 · Table 15 pp. 52–53
RVOT stroke-volume acquisition, subtraction of competent reference flow, regurgitant-fraction calculation, and limitations from diameter, VTI, rhythm, shunts, and additional regurgitant lesions.
- Quantitative and severe-supportive findings · Table 16 · PDF p. 56
Regurgitant-fraction ranges, jet-width ratio, branch pulmonary-artery flow reversal, and pressure half-time shorter than 100 ms as a severe-supportive finding.
- Integration & limitations · Table 16 p. 56 · Figure 35 and integrative pathway p. 57
Limited echocardiographic validation of quantitative PR, load dependence of pressure half-time, RV remodeling, and indeterminate classification when findings or data quality are discordant.
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.