Résumé : Aim. - To compare the assessment of infarct size using MRI and peak CK value. Population and methods. - 16 patients presenting with a first MI and seriall measurement of CK underwent gadolinium-enhanced MRI. Results. - A significant correlation was observed between both estimates of infarct size (r=0.56, p=0.0025). In addition, an inverse correlation was found between residual viability and peak CK (r=-0.51; p=0.043). Conclusion. - After a first episode of MI, infarct size estimate by MRI correlates with that determined by peak CK measurement. © 2005 Elsevier SAS. Tous droits réservé s.