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Table 1 Association of CMR characteristics with markers of arrhythmogenicity

From: CMR quantification of infarct tissue heterogeneity and remote myocardial fibrotic burden during convalescent phase following acute myocardial infarction (MI) provided strong and complementary evidence of ventricular arrhythmogenicity from quantitative microvolt T-wave alternans testing (the NHLBI PROSPECT-CMR study)

Association of fibrosis within remote myocardium with abnormal repolarization

Baseline

HRV (post-exercise)

 

FIMeanSeg

r=0.49 (p=0.03)

 

FITotal

r=0.68 (p<0.001)

 

6-months

QT Dispersion (post-exercise)

 

FIMeanSeg

r=0.72 (p=0.0007)

 

Association of infarct tissue characteristics with abnormal depolarization

Baseline

QRS duration (at rest)

QRS duration (during exercise)

Total Infarct (g)

r=0.44 (p<0.001)

r=0.35 (p=0.006)

CORE (g)

r=0.45 (p=0.0001)

r=0.41 (p=0.0002)

PIZ (g)

r=0.37 (p=0.0008)

r=0.35 (p=0.0002)