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Table 1 Summary of basic characteristics of the studies included in the meta-analysis

From: Image-guided left ventricular lead placement in cardiac resynchronization therapy for patients with heart failure: a meta-analysis

First author (year) Study design (trial name) CRT intervention Follow-up time Patient no. Age (yrs) Gender, male (%) NYHA grade LVEF (%) QRS width (ms)
Saba (2013) [43] RCT (STARTER) Image-guided 1.8 ± 1.3 yrs 110 66 ± 11 70 % II/III/IV: 16/64/20a 26 ± 6 157 ± 27
Standardb 77 67 ± 13 78 % II/III/IV: 8/71/21a 26 ± 7 162 ± 27
Khan (2012) [42] RCT (TARGET) Image-guided 2 yrs 110 72 (65–76) 77 % III/IV: 95/15c 23 ± 6 157 (148–170)
Standardb 110 72 (64–80) 80 % III/IV: 93/17c 23 ± 7 159 (146–170)
Bai (2011) [44] Prospective study Image-guided 6 mths 50 66 ± 11 60 % III or IV: 3.10 ± 0.30d 23 ± 7 153 ± 23
Standardb 54 64 ± 9 74 % III or IV: 3.07 ± 0.26d 26 ± 6 155 ± 29
  1. Abbreviations: CRT cardiac resynchronization therapy, NYHA New York Heart Association, LVEF left ventricular ejection fraction, RCT randomized control trials, yrs years, mths months, no number
  2. Data are presented as mean ± SD or median (inter-quartile range), unless noted otherwise. bStandard procedures means that empiric placement of LV leads was only facilitated by coronary venography, with a preference for a lateral, posterior, or posterolateral region as an implantation site. adata are presented as percentage; cdata are presented as counts; ddata are presented as mean ± SD