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Table 3 Angiographic characteristics and procedural data in the 3 groups

From: Periprocedural and clinical outcomes of percutaneous coronary intervention of chronic total occlusions in patients with low- and mid-range ejection fractions

VariableG (N) (nom. = 25)G (M) (nom. = 25)G (L) (nom. = 25)p value
Procedure time (min)
Mean ± SD79.12 ± 30.2480.36 ± 27.5480.28 ± 25.320.985
Range35-15036-14540-130
Contrast volume (ml)
Mean ± SD357.3 ± 215.2339.8 ± 198.4276.4 ± 139.40.04*
Range142-573141-538137-415
Syntax score
Mean ± SD21.64 ± 3.9022.72 ± 3.3522.84 ± 2.560.376
Range15-3017-2919-29
J-CTO score (N. (%))
≥ 312 (48%)13 (52%)15 (60%)0.687
< 313 (52%)12 (48%)10 (40%)
Wire technique
Antegrade20 (80%)19 (76%18 (72%)0.803
Retrograde5 (20%)6 (24%)7 (28%)
Wire stiffness
< 3 g17 (68%)15 (60%)16 (64%)0.841
> 3 g8 (32%)10 (40%)9 (36%)
  1. Data are expressed as mean ± SD or number (%)
  2. G (N): normal LVEF group, G (M): mid-range LVEF group, G (L): low LVEF group, *:significant