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Table 1 Characteristics of patients with wide and narrow QRS

From: Feature tracking measurement of dyssynchrony from cardiovascular magnetic resonance cine acquisitions: comparison with echocardiographic speckle tracking

Variable Patients with wide QRS width
(≥ 120 ms)
Patients with narrow QRS width
(< 120 ms)
P
Number of patients 55 17
Age, yrs 54 ± 15 62 ± 14 0.06
Gender, Male (%) 37 (67%) 10 (59%) 0.07
Ischemic Heart Disease (%) 12 (23%) 8 (47%) 0.09
QRS width, ms 148 ± 24 95 ± 15 < .001
Cardiac magnetic resonance    
 LV end-diastolic volume, cm3 188 ± 73 259 ± 110 0.003
 LV end-systolic volume, cm3 103 ± 71 187 ± 98 < 0.001
 Ejection fraction,% 49 ± 16 30 ± 17 < 0.001
Feature Tracking CMR Anteroseptal to posterior delay 230 ± 94 77 ± 92 < 0.001
Speckle tracking Echocardiography Anteroseptal to posterior delay 242 ± 101 75 ± 88 < 0.001
  1. CMR cardiovascular magnetic resonance, LV left ventricular.