Figure 1.

Effect of MI on infarct size (IS), body weight (BW), and ejection fraction percentage (EF%). The experimental model (a) consists of exposing similar age mice to cigarette smoking daily, for 7 days, prior to myocardial infarction (MI) induction via LAD ligation, which also lasted for 7 days. Myocardial infarction had no effect on infarct size (b) or body weights (c). On the other hand, both MI and S+MI groups showed statistically significant decrease in the ejection fraction, in comparison to the S group alone (d). Results are representatives of five different mice in each group (n = 5). ∗∗∗ indicate p < 0.0001.