The Localization and Characterization of Ischemic Scars in relation to the Infarct Related Coronary Artery Assessed by Cardiac Magnetic Resonance and a Novel Automatic Postprocessing Method

Table 2

Cardiac magnetic resonance characteristics assessed one year following acute myocardial infarction treated by primary percutaneous coronary intervention.

	Total	Infarct related artery (IRA)
		LAD ()	RCA ()	LCX ()
LGE-CMR data
LVEF (%)	52 ± 11	47 ± 11	56 ± 10	53 ± 5	0.130
LVEDVi (mL/m^2)	92 ± 23	98 ± 24	91 ± 23	75 ± 11	0.120
LVESVi (mL/m^2)	46 ± 21	53 ± 24	42 ± 19	35 ± 6	0.110
Scar size as %LV analyzed	7.8 ± 5.5	9.5 ± 6.3	5.8 ± 4.3	8.7 ± 5.2	0.137
Mean scar (pixels)	113 ± 77	118 ± 84	107 ± 78	116 ± 63	0.882
Mean Δϕ	44 ± 26°	49 ± 31°	37 ± 22°	46 ± 17°	0.571
Endocardial extent as %LV circumference	12.1 ± 7.2%	13.6 ± 8.6%	10.4 ± 6.2%	12.9 ± 4.8%	0.571
Mean Δλ	52 ± 20%	52 ±  0.18%	52 ± 0.24%	56 ± 0.15%	0.959
Ratio scar area/sector with scar	0.42 ± 0.14	0.45 ± 0.15	0.38 ± 0.12	0.46 ± 0.19	0.337
Manual data
Scar as %LV analyzed	17.4 ± 8.6	19.2 ± 11.2	15.2 ± 6.3	18.4 ± 1.0	0.506
Mean Δϕ	124 ± 47°	154 ± 53°	101 ±25°	101 ± 11°	0.006
Endocardial extent of infarction as %LV circumference	34.6 ± 13.0	42.9 ± 14.7	28.0 ± 6.8	28.0 ± 3.2	0.006
Mean Δλ	77 ± 23%	83 ± 17%	78 ± 19%	58 ± 14%	0.065

Kruskal-Wallis. Mann-Whitney test significant for the difference of mean Δϕ and endocardial extent of infarction as %LV circumference values of patients with LAD and RCA as IRA ( = 0.006 and = 0.002, resp.). LAD = left anterior descending artery. RCA = right coronary artery. LCX = left circumflex artery. LVEF = left ventricular (LV) ejection fraction. LVEDVi = LV end-diastolic volume index. LVESVi = LV end-systolic volume index. Δϕ = endocardium extent of infarction as angle. Δλ = transmurality of the scar as % of LV thickness.