Hemodynamics, fluids & transfusion
Carotid flow as a surrogate of the left ventricular stroke volume
Authors' conclusion
Although the CSD VTI could not be interchangeable with the LVOT VTI, it could be considered as its surrogate.
Study context
- Population
- Critical patients in the ICU, Sanatorio de los Arcos and Hospital Aleman, Buenos Aires, Argentina
- Participants
- 43 patients
- Exposure
- Carotid velocity-time integral (VTI) vs left ventricle outflow tract (LVOT) VTI by TTE
- Outcome
- Agreement of carotid VTI with LVOT VTI
Methodological detailssingle-blind, two-centre
- Single-blind
- Two-centre
Main finding
As reported in the abstract
- CS VTI
- Spearman's correlation coefficient 0.81 (95% CI 0.67–0.89)
- CSD VTI
- Spearman's correlation coefficient 0.89 (95% CI 0.81–0.94)
- CSD VTI · 5-chamber apical window LVOT VTI
- Bland-Altman bias - 0.2 (95% CI - 0.82 to 0.43)
- CSD VTI
- Lower concordance limit - 4.2 (95% CI - 5.2 to - 3.1)
- CSD VTI
- Upper concordance limit 3.8 cm (95% CI 2.7–4.9)
- Percentage error
- 37.9%
Observational data: associations, not effects.
Original publication
Carotid flow as a surrogate of the left ventricular stroke volume. J Clin Monit Comput. Published 18 November 2022. doi:10.
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