Dissecting myocardial mechanics in patients with severe aortic stenosis: 2-dimensional vs 3-dimensional-speckle tracking echocardiography

Table 3 Myocardial mechanics

Parameter	Study cohort	Reference values	P value
2D measurements (N = 168)
GLS (%)	−16.2 ± 2.1	−19.7 (−20.4, −18.9)^a	< 0.0001
GCS (%)	−27.4 ± 4.6	−23.3 (−24.6, −22.1)^a	< 0.0001
GRS (%)	37.5 ± 8.2	47.3 (43.6, 51.0)^a	< 0.0001
Basal rotation (°)	−7.8 ± 2.2	−7.5 ± 5.4^b	0.06
Apical rotation (°)	10.7 ± 4.0	6.3 ± 3.5^b	< 0.0001
Twist (°)	18.5 ± 4.7	13.4 ± 8.2^b	< 0.0001
3D measurements (N = 165)
GLS (%)	−14.5 ± 1.9	− 19.1 (− 18.2, 19.9)^c	< 0.0001
GCS (%)	−30.5 ± 7.1	−22.4 (−21.0, − 23.9)^c	< 0.0001
GRS (%)	41.6 ± 9.8	47.5 (41.5, 53.5)^c	< 0.0001
Twist (°)	13.7 ± 7.0	10.2 ± 7.6^b	0.003

Data are expressed as mean ± standard deviation or mean (95% confidence interval)
Abbreviations: 2D 2-dimensional, 3D 3-dimensional, GLS Global longitudinal strain, GCS Global circumferential strain, GRS Global radial strain
^aYingchoncharoen et al. [23]
^bAndrade et al. [24]
^cTruong et al. [25]

ISSN: 1471-2261