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Table 1 Baseline characteristics of patients and their response to CRT

From: Strain dyssynchrony index determined by three-dimensional speckle area tracking can predict response to cardiac resynchronization therapy

Variable All Patients
(14)
Responders
(9)
Non-Responders
(5)
p value
Age ( years ) 70 ± 9 70 ± 8 71 ± 12 NS
Male/female 12/2 8/1 4/1 NS
NYHA functional class III/IV 12/2 8/1 4/1 NS
QRS duration (ms) 172 ± 30 178 ± 32 163 ± 26 NS
SR/AF/paced 10/0/4 6/0/3 4/0/1 NS
End-diastolic volume (ml) 175 ± 72 194 ± 82 140 ± 29 NS
End-systolic volume (ml) 132 ± 67 152 ± 76 94 ± 20 NS
Ejection fraction (%) 27 ± 7 23 ± 6 32 ± 3 NS
Heart failure etiology     
Ischemic 5 (36%) 2 (22%) 3 (60%) NS
Non-ischemic 9 (64%) 7 (78%) 2 (40%) NS
Medication     
ACEI/ARB 11 (92%) 7 (89%) 4 (100%) NS
β-blockers 11 (92%) 7 (89%) 4 (100%) NS
Diuretics 10 (83%) 6 (75%) 4 (100%) NS
Area strain dyssynchrony index (%) 4.1 ± 1.4 4.8 ± 1.1 2.8 ± 0.7 < 0.005
Conventional dyssynchrony measurements (ms)     
Yu index 49 ± 17 48 ± 19 51 ± 15 NS
IVMD 46 ± 28 53 ± 31 34 ± 15 NS
Radial dyssynchrony determined by Speckle tracking strain 233 ± 129 277 ± 114 153 ± 126 NS
  1. ACEI, angiotensin converting enzyme inhibitor; AF, atrial fibrillation; ARB, angiotensin receptor blocker; IVMD, Interventricular mechanical delay; NS, not significance; NYHA, New York Heart Association; SR, sinus rhythm.