Table 3.

Strain rates and strain by two-dimensional echocardiographic speckle tracking imaging in the RV and LV

	RV		LV
	Control group	Patient group	Control group	Patient group
Ventricular strain rate, s−1
Early diastolic strain rate
Ventricular apex	2.00 ± 0.84	2.06 ± 0.72	2.28 ± 0.87	2.08 ± 0.70
Midsegment	2.10 ± 0.59	1.71 ± 0.59	1.80 ± 0.47	1.99 ± 0.68
Ventricular base	2.39 ± 0.77	2.12 ± 0.81	1.64 ± 0.38	2.31 ± 0.81
Late diastolic strain rate
Ventricular apex	1.00 ± 0.33	0.51 ± 0.17*	0.65 ± 0.22	0.66 ± 0.41
Midsegment	1.05 ± 0.37	0.57 ± 0.24*	0.60 ± 0.17	0.66 ± 0.47
Ventricular base	1.27 ± 0.41	0.91 ± 0.42	0.81 ± 0.25	1.00 ± 0.70
Systolic strain rate
Ventricular apex	−1.69 ± 0.41	−1.26 ± 0.25*	−1.35 ± 0.49	−1.36 ± 0.51
Midsegment	−1.57 ± 0.46	−1.27 ± 0.26*	−1.10 ± 0.18	−1.10 ± 0.29
Ventricular base	−1.85 ± 0.92	−1.58 ± 0.36	−1.49 ± 0.50	−1.47 ± 0.51
Peak strain, %
Mean	−26.3 ± 3.2	−21.6 ± 2.8	−19.5 ± 2.4	−19.7 ± 3.7

Values are means ± SD. The early diasolic strain rate was the strain rate during the E wave in early ventricular diastole, the late diastolic strain rate was the strain rate during the A wave in late ventricular diastole, and the systolic strain rate was the strain rate during ventricular systole.

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