PuSH - Publication Server of Helmholtz Zentrum München: Relationship between electrocardiographic and biochemical variables in coronary artery disease.

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Yue, W. ; Schneider, A.E. ; Rückerl, R. ; Koenig, W.* ; Marder, V.* ; Wang, S.* ; Wichmann, H.-E. ; Peters, A. ; Zareba, W.*

Relationship between electrocardiographic and biochemical variables in coronary artery disease.

Int. J. Cardiol. 119, 85-191 (2007)

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ECG (electrocardiogram) markers reflecting abnormal heart rate variability and abnormal repolarization as well as several biochemical markers reflecting inflammation, endothelial dysfunction, and procoagulation states were reported to show an association with increased cardiovascular mortality. ECG and biochemical markers could operate independently or they could interrelate in pathogenetic pathways of coronary disease. In this study, we aimed to explore the relationship between ECG and biochemical markers in a longitudinal study of coronary patients. METHODS: A total of 499 observations from 52 patients with up to 12 repeated measurements were collected providing data on series of ECG (heart rate variability and repolarization) parameters and biochemical parameters. Generalized estimating equation models adjusting for repeated measurements were used for the analyses. RESULTS: There was a significant association between ECG parameters reflecting abnormal repolarization (prolonged QT interval, lower T wave amplitude) and elevated levels of C-reactive protein and fibrinogen. Abnormal heart rate variability, increased sympathetic tone (low-frequency power) was associated with increased concentrations of soluble E-selectin, a marker of endothelial cell activation. There was no association between ECG markers and parameters reflecting increased procoagulation states. CONCLUSION: These results indicate that there is an association between ECG parameters and blood markers reflecting endothelial function and inflammation in coronary artery disease patients. The pathophysiologic mechanisms of these associations remain to be elucidated.

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