Transthoracic echocardiographic assessment of ventricular function in functional single ventricle: a comprehensive review

Table 2 Overview of reproducibility of emerging echocardiographic parameters

Study	Parameters	Intraobserver variability			Interobserver variability
Study	Parameters	n	ICC	Categorization^a	n	ICC	Categorization^a
Wilkinson et al[48].	2D-GLS	40	0.93	excellent	40	0.88	good
Tham et al[12].	2D-GLS 2D-GLSR	20	0.81 0.81	good good	52	0.83 0.93	good excellent
Colquitt et al[30].	2D-GLS 2D-GLSR	10	0.91 0.80	excellent good	10	0.85 0.78	good good
Sato et al[49].	3D-PS	25	0.86	good	25	0.81	good
Sato et al[50].	3D-PS	14	0.95	excellent	14	0.79	good
Chen et al[51].	3D-GLS 3D-GCS Twist Torsion	45	0.76 0.84 0.88 0.80	good good good good	45	0.83 0.80 0.87 0.83	good good good good
Bell et al[52].	RT3DE-EF	28	0.92	excellent	28	0.83	good
Soriano et al[53].	RT3DE-EF	7	0.86	good	27	0.75	good

a. Indicator repeatability classification criteria: ICC < 0.5: poor repeatability, 0.5 ≤ ICC < 0.75: moderate repeatability, 0.75 ≤ ICC < 0.9: good repeatability, ICC ≥ 0.9: excellent repeatability [53]
Abbreviations: ICC, intraclass correlation coefficient;2D-GLS, global longitudinal strain measured by two-dimensional speckle tracking imaging;2D-GLSR, global longitudinal strain rate measured by two-dimensional speckle tracking imaging;3D-PS, principal strains measured by three-dimensional speckle tracking imaging; 3D-GLS, global longitudinal strain measured by three-dimensional speckle tracking imaging;3D-GCS, global circumferential strain measured by three-dimensional speckle tracking imaging; RT3DE-EF, ejection fraction measured by real-time three-dimensional echocardiography

ISSN: 1476-7120