Table 4.

Comparison of the pulsed wave Doppler and tissue Doppler imaging in two subgroups of thalassemia

	Total (n=50), P	CMRT2* >20 (n=28), P	CMRT2* <20 (n=22), P	Control (n=50)
E (m/s)	102.20±8.01, 0.487	100.82±3.24, 0.045	101.10±7.68, 0.248	103.22±6.53
A (m/s)	54.87±5.82, 0.080	55.16±6.14, 0.131	54.36±5.32, 0.303	52.88±5.42
E/A (ratio)	1.88±0.23, 0.0001	1.69±0.26, 0.357	1.87±0.17, 0.0001	1.63±0.19
E-Dt (m/s)	135.86±22.70, 0.001	101.13±8.64, 0.0001	109.32±10.16, 0.0001	149.76±18.95
E’ (m/s)	18.21±2.60, 0.004	20.10±2.38, 0.912	16.73±1.63, 0.0001	20.02±3.40
A’ (m/s)	6.38±1.08, 0.036	6.94±1.20, 0.008	6.30±0.91, 0.0001	7.89±1.35
E’/A’ (ratio)	3.81±0.44, 0.004	2.95±0.45, 0.012	2.70±0.40, 0.0001	3.38±0.93
S’ (m/s)	8.49±1.20, 0.036	8.02±1.16, 0.008	7.53±1.39, 0.0001	9.09±1.60
LVMPI	0.41±0.09, 0.021	0.40±0.02, 0.016	0.43±0.05, 0.0001	0.37±0.08
E/E’ (ratio)	5.73±0.95, 0.002	5.69±0.68, 0.005	6.26±0.77, 0.0001	5.24±0.55
IVCT (m/s)	33.78±13.62, 0. 234	31.62±11.74, 0.733	38.99±10.66, 0.009	30.33±15.12
IVRT (m/s)	96.49±11.28, 0.008	93.01±5.27, 0.167	89.47±4.97, 0.786	90.04±12.53
ET (m/s)	251.24±43.36, 0.178	252.33±38.24, 0.371	251.25±41.36, 0.347	260.67±23.17

A=Peak velocity blood flow in late diastole, E=Peak velocity blood flow in early diastole, E-Dt=E-deceleration time, E’=Peak E myocardial velocity in early diastole, A’=Peak A myocardial velocity in late diastole, E’/A’=E/A myocardial velocity ratio, E/E’ ratio=Peak velocity blood flow in early diastole/peak E myocardial velocity in early diastole, S’=Systolic myocardial velocity, LVMPI=Left ventricular myocardial performance index, IVCT=Isovolumic contraction time, IVRT=Isovolumic relaxation time, ET=Ejection time, CMRT2*= Cardiovascular Magnetic Resonance T2*