Table 1 Clinical characteristics of patients
Parameter | All patients (n = 30) | With mechanical dyssynchrony (n = 23) | Without mechanical dyssynchrony (n = 7) | p value |
|---|---|---|---|---|
Clinical characteristics: | ||||
Male (% of total) | 16 (53%) | 10 (43%) | 6 (86%) | 0.05 |
Age (years) | 68 ± 10 | 68 ± 9 | 68 ± 12 | 0.94 |
Diabetes mellitus (% of total) | 4 (13%) | 3 (13%) | 1 (14%) | 0.93 |
Systolic blood pressure (mmHg) | 134 ± 22 | 134 ± 21 | 120 ± 28 | 0.18 |
Diastolic blood pressure (mmHg) | 69 ± 15 | 70 ± 14 | 65 ± 17 | 0.47 |
NYHA class II/III: | 17 (57%)/13 (43%) | 12 (52%)/11 (48%) | 5 (71%)/2 (29%) | 0.42 |
Electrocardiographic parameters: | ||||
QRS width (ms) | 161 ± 16 | 161 ± 15 | 163 ± 21 | 0.73 |
LBBB (Strauss) | 25 (83%) | 21 (91%) | 4 (57%) | 0.03 |
RV pacing | 1 (3%) | 0 (0%) | 1 (14%) | 0.23 |
NS-IVCD | 4 (10%) | 2 (9%) | 2 (29%) | 0.21 |
Echocardiographic parameters (pre-CRT): | ||||
EDV (ml) | 142 [133;193] | 142 [126;203] | 164 [116;202] | 0.88 |
ESV (ml) | 100 [91;138] | 98 [85;147] | 101 [76;138] | 0.74 |
EF (%) | 32 ± 8 | 32 ± 9 | 32 ± 5 | 0.99 |
Heart failure therapy: | ||||
β-blockers | 26 (87%) | 19 (83%) | 7 (100%) | 0.54 |
ACEi/ARB | 27 (90%) | 21 (91%) | 6 (86%) | 0.66 |
Aldosterone antagonists | 17 (57%) | 13 (57%) | 4 (57%) | 0.9 |