Fig. 4. Change in glycogen (A ) and adenosine triphosphate (ATP;B ) content and calculated proton production (C ) during 8 h of hypothermic storage. Values are shown for untreated stored hearts (n = 6), hearts treated with isoflurane during the initial 10-min Langendorff perfusion (L) and storage (S) phases (n = 6), isoflurane-preconditioned hearts (n = 6), and isoflurane-preconditioned hearts treated with 5-hydroxydecanoate (5-HD) during storage (n = 6). *P < 0.05 versus untreated stored hearts. Data are mean ± SEM.