Table 1.
Demographic and clinical characteristics
| 20 | Total (n=63) |
| Demographic characteristics | |
| Age, years | 56.86 ± 10.3 |
| Male, n (%) | 52 (82.5) |
| BMI, kg/m2 | 28.57 ± 3.14 |
| BSA, m2 | 1.98 ± 0.21 |
| AMI type and revascularization | |
| ST-segment elevation myocardial infarction, n (%) | 43 (68.3) |
| Percutaneous coronary intervention, n (%) | 54 (85.7) |
| Risk factors and medical history | |
| History of smoking, n (%) | 38 (60.3) |
| Diabetes, n (%) | 16 (25.4) |
| Hypertension, n (%) | 44 (69.9) |
| Obesity, n (%) | 21 (33.3) |
| Dyslipidaemia, n (%) | 61 (96.8) |
| Peripheral artery disease, n (%) | 1 (1.6) |
| Chronic kidney disease, n (%) | 17 (27.0) |
Figure 1.
Bland-Altman plots (panel A) and correlations (panel B) for measurements of tricuspid annular plane systolic excursion (TAPSE) by advanced (R1), intermediate (R2), and beginner (R3) readers.
Figure 2.
Bland-Altman plots (panel A) and correlations (panel B) for measurements of right ventricular systolic wave velocity (S’t) by advanced (R1), intermediate (R2), and beginner (R3) readers.
Figure 3.
Bland-Altman plots (panel A) and correlations (panel B) for measurements of fractional area change (FAC) by advanced (R1), intermediate (R2), and beginner (R3) readers.
Figure 4.
Bland-Altman plots (panel A) and correlations (panel B) for measurements of 3D Right ventricular ejection fraction (3D RVEF) by advanced (R1), intermediate (R2), and beginner (R3) readers.
Table 2.
Interobserver variability and agreement between echocardiographers with different levels of experience for TAPSE, S’t, FAC, and 3D RVEF
| R1 vs R2 | TAPSE | S’t | FAC | 3D RVEF |
| Bias (95% CI) | 0.24 (−0.08:0.55) | 0.19 (0.0;0.38) | 0.36 (−0.3;1.02) | −0.02 (−0.64;0.6) |
| Lower LOA (95% CI) | −2.27 (−2.82; −2.27) | −1.3 (−1.62;−1.3) | −4.9 (−6.05;−4.9) | −4.96 (−6.03;−4.96) |
| Upper LOA (95% CI) | 2.75 (2.20;3.29) | 1.68 (1.35;2.0) | 5.62 (4.47;6.77) | 4.91 (3.84;5.99) |
| R1 vs R3 | TAPSE | S’t | FAC | 3D RVEF |
| Bias (95% CI) | 0.38 (0.09;0.67) | 0.36 (0.11;0.62) | 0.09 (−0.73;0.91) | −0.38 (−1.15;0.39) |
| Lower LOA (95% CI) | −1.94 (−2.45;−1.94) | −1.64 (−2.07;−1.64) | −6.44 (−7.86;−6.44) | −6.48 (−7.81;6.48) |
| Upper LOA (95% CI) | 2.7 (2.19;3.21) | 2.37 (1.93;2.80) | 6.62 (5.19;8.04) | 5.72 (4.39;7.05) |
| R2 vs R3 | TAPSE | S’t | FAC | 3D RVEF |
| Bias (95% CI) | 0.14 (−0.17;0.46) | 0.17 (−0.13;0.48) | −0.27 (−1.25;0.71) | 0.36 (−1.01;0.3) |
| Lower LOA (95% CI) | −2.37 (−2.92;−2.37) | −2.25 (−2.78;−2.25) | −8.07 (−9.77;−8.07) | −5.57 (−6.7;−5.57) |
| Upper LOA (95% CI) | 2.65 (2.11;3.2) | 2.60 (2.07;3.13) | 7.53 (5.83;9.23) | 4.85 (3.72;5.99) |
| ICC (95% CI) | 0.977 (0.965–0.985) | 0.967 (0.95–0.98) | 0.98 (0.97–0.99) | 0.98 (0.97–0.99) |