Table 3 Correlations of S-Sr, E-Sr, A-Sr and strain in normal subjects and the cohort with hypertension

Measures of atrial function	R coefficient
Measures of atrial function	Global S-Sr	Global E-Sr	Global A-Sr	Global strain
Age	−0.16	−0.52**	0.06	−0.18
Systolic BP seated	−0.10	−0.20*	0.03	0.02
Peak A	0.08	−0.20*	0.35**	0.08
Deceleration time	0.05	−0.27**	0.08	0.03
Atrial fraction	0.06	−0.29**	0.29**	0.04
LA total emptying fraction	0.19	0.25*	0.16	0.27*
Septal A′ velocity	0.16	−0.09	0.29**	0.19
LA Vol_max	−0.21*	−0.23**	−0.11	−0.07
Area–length LV mass	−0.05	−0.24*	0.09	−0.04
Indexed active emptying volume	−0.06	−0.30**	−0.06	−0.11
Active emptying fraction	0.12	−0.08	0.11	0.10
Indexed conduit emptying volume	−0.01	0.15	−0.06	0.01
Indexed passive emptying volume	−0.05	0.13	−0.09	0.09
Passive emptying fraction	0.04	0.31**	0.03	0.18

*p<0.05; **p<0.01.
A′, atrial contraction, velocity using Doppler tissue imaging; A-Sr, peak atrial strain rate; BP, blood pressure; E-Sr, early diastolic strain rate; LA, left atrium; LV, left ventricle; S-Sr, peak systolic strain rate; Vol_max, maximum left atrial volume.