The warm-up effect protects against @entity1002 in @entity1 with XXXX .

@entity1 @entity662 @entity296 @entity308 @entity301 @entity63 @entity951 @entity1002
OBJECTIVES: The goal of this study was to investigate whether the "warm-up" effect in @entity951 protects against @entity1002 . BACKGROUND: After exercise, @entity1 with @entity301 demonstrate persistent @entity296 , which may represent stunning, as well as warm-up protection against @entity951 , which may represent @entity63 preconditioning. The effect of warm-up exercise on LV function during subsequent exercise has not been investigated. METHODS: Thirty-two @entity1 with multivessel @entity301 and preserved LV function performed two supine bicycle exercise tests 30 min apart. Equilibrium radionuclide angiography was performed before, during and up to 60 min after each test. Global LV ejection fraction and volume changes and regional ejection fraction for nine LV sectors were calculated for each acquisition. RESULTS: Onset of @entity662 or 1 mm ST @entity308 was delayed and occurred at a higher rate-pressure product during the second exercise test. Sectors whose regional ejection fraction fell during the first test showed persistent reduction at 15 min (68 +/- 20 vs. 73 +/- 20%, p < 0.0001). These sectors demonstrated increased function during the second test (71 +/- 20 vs. 63 +/- 20%, p = 0.0005). The reduction at 15 min and the increase during the second test were both in proportion to the reduction during the first test. Effects on global function were only apparent when the initial response to exercise was considered. CONCLUSIONS: The warm-up effect is accompanied by protection against @entity1002 . The degree of stunning and protection after exercise is related to the severity of dysfunction during exercise, consistent with results from experimental models.
