Fig. 3

Evolution of the peri-infarct zone in patients with and without MVO. Panel (a) represents means and standard deviations of peri-infarct zone size, expressed as a percentage of LV mass, for all patients with MVO across the three time frames. Panel (b) represents T1 weighted IR-GRE Late gadolinium enhancement images in a patient with MVO with infarct core superimposed in green and PIZ superimposed in yellow. The red represents area of no reflow or MVO. Directly underneath, a panel displaying T2 maps at the three different time frames for the same patient is displayed. The yellow arrow indicates the T2 value in the PIZ and the white arrow indicates the T2 value in the remote myocardium. Panel (c) represents means and standard deviations of peri-infarct zone size, expressed as a percentage of LV mass, for all patients without MVO across the three time frames. Panel (d) represents the T1 weighted IR-GRE Late gadolinium enhancement images in a patient without MVO with infarct core superimposed in green and PIZ superimposed in yellow. Directly underneath, a panel displaying T2 maps at the three different time frames for the same patient is displayed. The yellow arrow indicates the T2 value in the PIZ and the white arrow indicates the T2 value in the remote myocardium. Of note, the patient with MVO has higher T2 values in the PIZ when compared to the patient without MVO at 48 h and 3 weeks but not at 6 months. Further, in both patients, T2 values in the PIZ are elevated at the first two time-frames when compared to the remote myocardium. At 6 months, T2 values are similar in the PIZ and the remote myocardium in both patients. A yellow patch is noted in the septal region in the patient without MVO at 6 months that is due to artifact from patient motion