Table 2

Infarct Characteristics

Acute VisitConvalescent Visitp Value
Ejection fraction, %49 ± 959 ± 7<0.01
LV EDVi, ml/m281 ± 1584 ± 20NS
LV ESVi, ml/m241 ± 1235 ± 13<0.01
LV mass, g129 ± 28111 ± 28<0.01
LGE transmural extent, %33 ± 1626 ± 11<0.01
LGE infarct volume, ml16 ± 1110 ± 8<0.01
LGE MO volume, ml2 ± 2
Area at risk, ml34 ± 14
Myocardial salvage index0.56 ± 0.25
Infarct native T11,333 ± 1101,244 ± 124<0.01
Remote native T11,189 ± 751,146 ± 1020.05
Infarct ECV0.56 ± 0.14
Remote ECV0.29 ± 0.06

Values are mean ± SD. Values given are from a per-patient analysis. Normal values for T1 and ECV are 1,052 ± 23 and 0.26 ± 0.04, respectively.

ECV = extracellular volume; EDVi = end-diastolic volume, indexed to body surface area; ESVi = end-systolic volume, indexed to body surface area; LGE = late gadolinium enhancement; LV = left ventricular; MO = microvascular obstruction.