Isoflurane preconditioning improved the recovery of cardiac fnction during post-ischemic reperfusion in Langendorff-perfused C57BL/6 mouse hearts but not db/db mouse hearts. A: left ventricular end-diastolic pressure (mean ± SD); B: left ventricular developed pressure; C: the maximum rate of developed pressure rise (+dp/dt); D: the maximum rate of developed presure decreases (−dP/dt). Control, C57BL/6 mouse hearts undergoing ischemia/reperfusion injury: db/db, db/db mouse hearts undergoing ischemia/reperfusion injury; isoflurane, C57BL/6 mouse hearts treated with 1.4% isoflurane before ischemia; db/db+isoflurane, db/db mouse hearts treated with 1.4% isoflurane before ischemia. *P<0.05 versus control groups, †P<0.05 versus db/db groups, #P<0.05 versus isoflurane groups (n=8 mice/group).