Figure 2.

Time courses of the changes in the pressure-rate product (PRP) during hypoxia-reoxygenation. The recoveries of PRP were quicker in the hearts of the ischemic preconditioning (PR) group (open diamonds) and ischemic postconditioning (PT) group (open circles) than in the hearts of the control group (closed squares), and the PR plus PT group (closed triangles) had the quickest recovery. *P<0.05 and **P<0.01 versus the control group; ^#P<0.05 versus the PR group; ⁺P<0.05 versus the PTgroup. N Normal; R Reoxygenation