Table 2.
Comparison of measurement of left ventricular stroke volume by electrical velocimetry versus transthoracic echocardiography using Bland–Altman analysis
| Study arm | Group | Number of patients/ measurements | Bias (%) | MPE (%) |
|---|---|---|---|---|
| EVVTI | All | 72/146 | 7.81 | 26.16 |
| OTX | 28/65 | 5.05 | 23.03 | |
| SEPSIS | 16/36 | 2.62 | 26.82 | |
| NEURO | 9/16 | 6.98 | 14.79 | |
| PREM | 26/41 | 39.00 | 46.27 | |
| EVMM | All | 72/139 | 8.07 | 37.26 |
| OTX | 28/59 | 5.04 | 28.96 | |
| SEPSIS | 16/35 | 2.57 | 43.53 | |
| NEURO | 9/16 | 6.65 | 27.10 | |
| PREM | 26/40 | 39.53 | 42.80 |
Data were analyzed for subgroups. EVMM, electrical velocimetry versus the transthoracic echocardiography M-mode; EVVTI, electrical velocimetry versus the transthoracic echocardiography velocity time integral; MPE, mean percentage error; NEURO, acute neurological patients subgroup; OTX, solid organ transplantation subgroup; PREM, preterm infants subgroup; SEPSIS, sepsis or other organ failure subgroup.