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- W2001958136 abstract "Exercise training is thought to exert a beneficial effect on cardiovascular function, but its effect in the normal heart following acute coronary artery occlusion is still uncertain. Studies were performed in 12 untrained (UT) and 14 endurance-trained (ET) pentobarbital anesthetized dogs. Left ventricular pressure (LVP), heart rate (HR), percent regional myocardial segmental shortening (%SL), and peripheral coronary pressure (PCP) distal to the occlusion were measured during control conditions and during a 2-min circumflex artery occlusion (CAO). During CAO, LVP, dP/dtmax, and %SL in the ischemic region were significantly reduced in both UT and ET dogs. There was no significant difference between the two groups. In addition, PCP decreased to 27 +/- 5 mm Hg and 26 +/- 9 mm Hg in the UT and ET groups, respectively, during CAO indicating no difference in coronary collateral perfusion between the groups. Regional myocardial blood flow was measured using tracer microspheres in eight of the UT and six of the ET dogs, and the decrease in blood flow to the ischemic zone during CAO was similar in both groups. These results indicate that 12-wk of endurance training does not exert a protective effect on myocardial contractile function or on myocardial perfusion in the central ischemic region during CAO in the anesthetized dog." @default.
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- W2001958136 date "1992-11-01" @default.
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- W2001958136 title "Cardiac response to acute coronary artery occlusion in exercise-trained dogs" @default.
- W2001958136 doi "https://doi.org/10.1249/00005768-199211000-00008" @default.
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