Doppler Stroke Volume & CO (LVOT-VTI)
Doppler stroke volume and cardiac output from the LVOT: cross-sectional area (from diameter) × velocity-time integral, indexed to BSA.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- LVOT diameter
- 2.2 cm
- LVOT VTI
- 22 cm
- Heart rate
- 70 bpm
- Body surface area
- 1.9 m²
Result: Stroke volume 83.6 mL; cardiac output 5.85 L/min; CI 3.08 L/min/m².
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Normal
- Stroke-volume index 35–47 mL/m²; cardiac index 2.5–4.0 L/min/m².
What you enter
- LVOT diameter
- LVOT VTI
- Heart rate
- Body surface area
How this is calculated
- Formula
- LVOT area = π·(D/2)²; SV = area·VTI; CO = SV·HR/1000; SVI = SV/BSA; CI = CO/BSA.
Lang RM, Badano LP, Mor-Avi V, et al. Recommendations for cardiac chamber quantification by echocardiography in adults (ASE/EACVI). J Am Soc Echocardiogr. 2015;28(1):1-39. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.