PGF and myocardial infarction: Iwama et al observed that patients with higher plasma PlGF levels on day 3 after AMI showed greater improvement in left ventricular ejection fraction (LEVF) during the chronic phase (6 months post MI) than did patients with lower plasma PlGF levels, and they also observed that patients with improvement in LEVF in the chronic phase had significantly higher plasma levels of PlGF in the acute phase compared with patients without improvement; these findings suggest that PlGF may be involved in repairing injured myocardial tissue [13].