Table 4.

Strain rates and strain by two-dimensional echocardiographic speckle tracking imaging in the RA and LA

	RA		LA
	Control group	Patient group	Control group	Patient group
Atrial strain rate, s−1
Early emptying strain rate
Atrial base	−3.52 ± 1.02	−2.36 ± 1.29*	−3.37 ± 0.73	−2.81 ± 1.08
Midsegment	−2.62 ± 0.87	−2.38 ± 1.13	−3.25 ± 0.91	−2.66 ± 0.88
Atrial roof	−2.34 ± 1.06	−2.59 ± 1.17	−3.19 ± 1.14	−2.61 ± 0.69
Late emptying strain rate
Atrial base	−3.82 ± 0.92	−2.76 ± 1.00*	−1.43 ± 0.48	−2.36 ± 1.47
Midsegment	−2.50 ± 0.44	−2.59 ± 1.01	−1.80 ± 0.57	−2.20 ± 1.11
Atrial roof	−2.11 ± 0.91	−2.50 ± 0.44	−2.13 ± 0.80	−2.22 ± 1.15
Filling strain rate
Atrial base	4.61 ± 0.97	2.78 ± 0.89*	2.43 ± 0.84	2.41 ± 0.64
Midsegment	4.05 ± 0.64	2.64 ± 0.83*	2.26 ± 0.87	2.25 ± 0.82
Atrial roof	3.87 ± 0.96	2.80 ± 0.94*	2.48 ± 0.69	2.26 ± 0.94
Peak strain, %
Mean	96.2 ± 15.8	42.4 ± 10.7*	52.9 ± 10.3	46.3 ± 12.7

Values are means ± SD. RA, right atrium; LA, left atrium. The early emptying strain rate was the strain rate during the E wave in early ventricular diastole, the late emptying strain rate was the strain rate during the A wave in late ventricular diastole, and the filling strain rate was the strain rate during ventricular systole.

^*Significant difference compared with data in control subjects (P < 0.05).