PMID- 2121010 OWN - NLM STAT- MEDLINE DCOM- 19901105 LR - 20190626 IS - 0002-8703 (Print) IS - 0002-8703 (Linking) VI - 120 IP - 4 DP - 1990 Oct TI - Myocardial infarct size reduction by the synergistic effect of hyperbaric oxygen and recombinant tissue plasminogen activator. PG - 791-800 AB - Fasting mongrel dogs underwent hyperbaric oxygen treatment (HBOT), recombinant tissue plasminogen activator (rt-PA) treatment, and simultaneous HBOT and rt-PA treatment following prior experimental left anterior descending coronary artery occlusion for 2 hours. Thrombosis in and around a copper coil was recorded angiographically at regular intervals, and immediately prior to treatment conclusion. Controls (n = 10) were untreated. Group two animals (n = 10) were treated additionally with 90 minutes of HBOT at 2 atm absolute. Group three animals (n = 8) were treated additionally with 50 mg rt-PA over 90 minutes. Group four animals (n = 10) were treated additionally with simultaneous HBOT and rt-PA over 90 minutes. Myocardial injury was determined by a combination of triphenyltetrazolium chloride histochemical staining and by formazan dye extraction. Damage was measured as a percent of left ventricular cross-sectional area studied. HBOT alone restored 35.9% of oxidative enzyme activity (p greater than 0.001). Treatment with rt-PA alone restored 48.9% of enzyme activity (p greater than 0.001). The combination of HBOT and simultaneous rt-PA resulted in 96.9% restoration of oxidative enzyme activity versus the control group (p greater than 0.001). FAU - Thomas, M P AU - Thomas MP AD - Department of Surgery and Pathology, Meridia Huron Hospital, Cleveland, OH 44112. FAU - Brown, L A AU - Brown LA FAU - Sponseller, D R AU - Sponseller DR FAU - Williamson, S E AU - Williamson SE FAU - Diaz, J A AU - Diaz JA FAU - Guyton, D P AU - Guyton DP LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am Heart J JT - American heart journal JID - 0370465 RN - 0 (Recombinant Proteins) RN - EC 3.4.21.68 (Tissue Plasminogen Activator) SB - IM MH - Animals MH - Combined Modality Therapy MH - Dogs MH - Female MH - *Hyperbaric Oxygenation MH - Male MH - Myocardial Infarction/drug therapy/pathology/*therapy MH - Myocardium/enzymology/pathology MH - Recombinant Proteins/therapeutic use MH - Tissue Plasminogen Activator/*therapeutic use EDAT- 1990/10/01 00:00 MHDA- 1990/10/01 00:01 CRDT- 1990/10/01 00:00 PHST- 1990/10/01 00:00 [pubmed] PHST- 1990/10/01 00:01 [medline] PHST- 1990/10/01 00:00 [entrez] AID - 0002-8703(90)90194-3 [pii] AID - 10.1016/0002-8703(90)90194-3 [doi] PST - ppublish SO - Am Heart J. 1990 Oct;120(4):791-800. doi: 10.1016/0002-8703(90)90194-3.