In control hearts, only a few Wt1 positive cardiomyocytes were detected as described above, while the frequency was notably increased in acute MI samples especially in the border zone of the myocardial infarction, and more Wt1-positive cardiomyocytes, compared to controls, were still detected 3 weeks after MI (Figure 3b). The gene discussed is WT1; the disease is myocardial infarction.