Hemodynamics, fluids & transfusion
Bioimpedance based determination of cardiac index does not show enough trueness for point of care use in patients with systolic heart failure
Authors' conclusion
Underlying systolic HF substantially decreases the validity of TBI for estimation of CO and SV.
Study context
- Population
- Patients with and without systolic heart failure (HF) undergoing right heart catheterization including thermodilutionThoracic bioimpedance (TBI) obtainable in all
- Participants
- 14 vs 17
- Exposure
- Thoracic bioimpedance vs thermodilution for cardiac output (CO)
- Systolic HFn = 14
- Without systolic HFn = 17
- Outcome
- Agreement of TBI with thermodilution for CO (Bland-Altman bias, limits of agreement, percentage error)
Methodological detailssemi-simultaneous measurement, Bland-Altman analysis, retrospectively registered
- Semi-simultaneous measurement
- Bland-Altman analysis
- Retrospectively registered
Main finding
As reported in the abstract
CO agreement, TBI vs thermodilution (all patients)
Mean bias for CO
0.3 L/min
Limits of agreement for CO
± 2.0 L/min
Percentage error for CO
43.3%
Observational data: associations, not effects.
Further findings
Percentage error for CO by subgroup
Stroke volume agreement, TBI vs thermodilution
- Bias for stroke volume (SV)
- −7.3 ml
- Limits of agreement for SV
- ± 34 ml
Original publication
Bioimpedance based determination of cardiac index does not show enough trueness for point of care use in patients with systolic heart failure. J Clin Monit Comput. Published 19 April 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →