Figure 1
From: Effects of sildenafil and/or muscle derived stem cells on myocardial infarction
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1479-5876-10-159/MediaObjects/12967_2012_Article_1183_Fig1_HTML.jpg)
Experimental protocol. Myocardial infarction (MI) was induced in rats by left anterior descending coronary artery (LAD) ligation. Arrows indicate the time points for treatments with sildenafil alone, MDSC, and MDSC + sildenafil, performance of surgical procedure, and measurement of various parameters (listed under each arrow), and final sacrifice.