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• W2114070259 abstract "Circulating levels of B-type natriuretic peptide (BNP) and the amino-terminal portion of the prohormone (NT-proBNP) have been reported to increase immediately after myocardial ischemia. The association between extent of exercise-induced myocardial ischemia measured using myocardial perfusion scintigraphy and the magnitude and time course of changes in NT-proBNP was studied. One hundred one patients underwent symptom-limited exercise myocardial perfusion scintigraphy. Myocardial ischemia was assessed semiquantitatively. Serum samples were obtained before the start of exercise (baseline), at maximal exercise, and every hour up to 6 hours after maximal exercise. Myocardial ischemia was present in 37 patients (37%). NT-proBNP rapidly increased during exercise (to 113%, interquartile range 104 to 144, and 118%, interquartile range 106 to 142, of baseline, respectively), with a second peak at 4 (141%, interquartile range 119 to 169) and 5 hours (136%, interquartile range 93 to 188), respectively. Absolute changes between NT-proBNP at baseline and at maximum exercise in patients with versus without ischemia were similar (median, 30 pg/ml, interquartile range 7 to 45 vs 15, interquartile range 4 to 46, respectively, p = 0.230), but absolute change between baseline and the secondary peak was higher in patients with ischemia than in patients without ischemia (median 64 pg/ml, interquartile range 32 to 172 vs 34, interquartile range 19 to 85, respectively, p = 0.024). In multivariate linear stepwise regression analysis of determinants of changes in NT-proBNP after exercise, baseline NT-proBNP was the only independent determinant of absolute changes at maximum exercise, whereas the presence of ischemia was not predictive. Baseline NT-proBNP, cystatin C, and end-systolic volume were independent determinants of the absolute increase to secondary peak levels. In conclusion, myocardial ischemia per se did not lead to additional increases in NT-proBNP within 6 hours after exercise. Circulating levels of B-type natriuretic peptide (BNP) and the amino-terminal portion of the prohormone (NT-proBNP) have been reported to increase immediately after myocardial ischemia. The association between extent of exercise-induced myocardial ischemia measured using myocardial perfusion scintigraphy and the magnitude and time course of changes in NT-proBNP was studied. One hundred one patients underwent symptom-limited exercise myocardial perfusion scintigraphy. Myocardial ischemia was assessed semiquantitatively. Serum samples were obtained before the start of exercise (baseline), at maximal exercise, and every hour up to 6 hours after maximal exercise. Myocardial ischemia was present in 37 patients (37%). NT-proBNP rapidly increased during exercise (to 113%, interquartile range 104 to 144, and 118%, interquartile range 106 to 142, of baseline, respectively), with a second peak at 4 (141%, interquartile range 119 to 169) and 5 hours (136%, interquartile range 93 to 188), respectively. Absolute changes between NT-proBNP at baseline and at maximum exercise in patients with versus without ischemia were similar (median, 30 pg/ml, interquartile range 7 to 45 vs 15, interquartile range 4 to 46, respectively, p = 0.230), but absolute change between baseline and the secondary peak was higher in patients with ischemia than in patients without ischemia (median 64 pg/ml, interquartile range 32 to 172 vs 34, interquartile range 19 to 85, respectively, p = 0.024). In multivariate linear stepwise regression analysis of determinants of changes in NT-proBNP after exercise, baseline NT-proBNP was the only independent determinant of absolute changes at maximum exercise, whereas the presence of ischemia was not predictive. Baseline NT-proBNP, cystatin C, and end-systolic volume were independent determinants of the absolute increase to secondary peak levels. In conclusion, myocardial ischemia per se did not lead to additional increases in NT-proBNP within 6 hours after exercise." @default.
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• W2114070259 date "2009-03-01" @default.
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• W2114070259 title "Relation of N-Terminal Pro B-Type Natriuretic Peptide Levels After Symptom-Limited Exercise to Baseline and Ischemia Levels" @default.
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• W2114070259 doi "https://doi.org/10.1016/j.amjcard.2008.11.006" @default.
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