| |
All patients (n = 48)
|
CRT Responders (n = 34, 71%)
|
CRT Nonresponders (n = 14, 29%)
|
p Value
|
|---|
|
Atrioventricular dyssynchrony, n (%)
|
23 (48%)
|
16 (47%)
|
7 (50%)
|
0.853
|
|
IVMD >40 ms, n (%)
|
38 (79%)
|
31 (91%)
|
7 (50%)
|
0.003*
|
|
LVPEI (ms)
|
171 ± 27
|
175 ± 27
|
164 ± 28
|
0.189
|
|
DTI septo-lateral delay (ms)
|
110 [74;161]
|
114 [74;189]
|
93 [72;117]
|
0.162
|
|
Septal Flash, n (%)
|
30 (63%)
|
27 (79%)
|
3 (21%)
|
0.001*
|
|
Mean strain peak (%)
|
−10.2 [−11.6;-9.2]
|
−10.6 [−11.7;-9.6]
|
−9.7 [−11.3;-8.4]
|
0.302
|
|
SDtpeak (ms)
|
104 [80;123]
|
101 [80;123]
|
107 [66;121]
|
0.626
|
|
Mean IL,peak (%.s-1)
|
1.68 ± 0.59
|
1.80 ± 0.62
|
1.39 ± 0.41
|
0.029*
|
|
Mean I^avc (%.s−1)
|
0.62 [0.34;0.90]
|
0.76 [0.44;0.92]
|
0.45 [0.24;0.77]
|
0.129
|
|
SDIL,peak (%.s−1)
|
1.09 [0.82;1.32]
|
1.18 [0.96;1.35]
|
0.83 [0.55;0.99]
|
0.007*
|
|
SDIL,avc (%.s-1)
|
0.85 ± 0.37
|
0.90 ± 0.35
|
0.72 ± 0.39
|
0.125
|
|
DiffInt (%.s-1)
|
0.57 ± 0.5
|
0.61 ± 0.47
|
0.47 ± 0.58
|
0.360
|
|
MSDI (ms)
|
0.35 ± 0.16
|
0.37 ± 0.16
|
0.29 ± 0.14
|
0.106
|
- Data are presented as n (%), mean ± SD, median [IQR]. DiffInt average of 17 LV segments of the difference between IL,avc and IL,peak for each 17 LV segments, DTI doppler tissue imaging, LVPEI left ventricular pre-ejection interval, I
L,avc
integrals of longitudinal strain signals for each 17 LV segments from the beginning of the cardiac cycle (QRS onset) to the instant of aortic valve closure, I
L,peak
integrals of longitudinal strain signals for each 17 LV segments from the beginning of the cardiac cycle (QRS onset) to the instant of the corresponding longitudinal strain peak, IVMD interventricular mechanical delay, MSDI Maximal Difference between Strain peak Instants, SD standard deviation, SDI
L
,
peak
standard deviation of the integrals of strain signals I
L,peak
of 17 LV segments, SDI
L,avc
standard deviation of the integrals of strain signals I
L,avc
of 17 LV segments, t
peak
time to strain peak. * p Value <0,05
