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. 2022 Oct 13;12(10):e063793. doi: 10.1136/bmjopen-2022-063793

Table 3.

Mean values and the agreement of automatic hand-held ultrasound measurements of left ventricular function compared with reference

Hand-held ultrasound operator Reference echocardiography
GP (novice) RCN (intermediate) Cardiologist (expert)
Mean and agreement, autoEF (all recordings)
 Mean (SD), %* 51.7 (10.1) 52.9 (9.6) 53.3 (9.5) 53.4 (10.1)
 Coefficient of variation, % 15.4 13.3 12.0
 Coefficient of repeatability, %* 24.0 24.2 21.5
Mean and agreement, autoEF (first software version, n=107)
 Mean (SD), %* 52.6 (11.6) 54.2 (10.3) 55.0 (10.4) 53.5 (10.0)
 Coefficient of variation, % 14.8 13.5 11.2
 Coefficient of repeatability, %* 24.7 24.6 21.4
Mean and agreement, autoEF (revised software version, n=63)
 Mean (SD), %* 50.8 (8.4) 51.0 (8.3) 51.6 (8.1) 54.7 (9.6)
 Coefficient of variation, % 16.0 13.1 12.9
 Coefficient of repeatability, %* 20.6 20.6 19.8
Mean and agreement, autoMAPSE (all patients)
Mean of septal and lateral position
 Mean (SD), mm 9.8 (2.4) 10.1 (2.6) 10.2 (2.5) 11.4 (2.9)
 Coefficient of variation, % 24.3 20.5 18.9
 Coefficient of repeatability, mm 5.0 4.8 4.1

Comprehensive echocardiography by experienced cardiologists used as reference.

*% points.

AutoEF, automatic measurement of left ventricular ejection fraction; AutoMAPSE, automatic measurement of mitral annular plane systolic excursion; GP, general practitioner; RCN, registered cardiac nurse.