This study was supported by the Swedish Research Council, the Swedish Heart Lung Foundation, Region of Scania and the Medical Faculty, Lund University and Skåne University Hospital, Lund, Sweden.
Consideration of the Impact of Reperfusion Therapy on the Quantitative Relationship between the Selvester QRS Score and Infarct Size by Cardiac MRI
Article first published online: 13 JUL 2010
©2010, Wiley Periodicals, Inc.
Annals of Noninvasive Electrocardiology
Volume 15, Issue 3, pages 238–244, July 2010
How to Cite
Knippenberg, S. A. M., Wagner, G. S., Ubachs, J. F. A., Gorgels, A., Hedström, E., Arheden, H. and Engblom, H. (2010), Consideration of the Impact of Reperfusion Therapy on the Quantitative Relationship between the Selvester QRS Score and Infarct Size by Cardiac MRI. Annals of Noninvasive Electrocardiology, 15: 238–244. doi: 10.1111/j.1542-474X.2010.00370.x
- Issue published online: 13 JUL 2010
- Article first published online: 13 JUL 2010
- myocardial infarction;
- magnetic resonance imaging
Background: It has previously been shown that there is a good agreement between the Selvester QRS score and myocardial infarct (MI) size determined by postmortem histopathology in patients with nonreperfused MI. Currently, however, most patients with acute coronary thrombosis receive reperfusion therapy. Therefore, the aim of this study was to test the hypothesis that early reperfusion alters the quantitative relationship between Selvester QRS score and MI size.
Methods: Twenty-seven patients with acute first-time reperfused MI were studied. Infarct size was determined by delayed contrast-enhanced magnetic resonance imaging (DE-MRI) and estimated with the 50-criteria/31-point Selvester QRS scoring system 1 week after admission. The findings in the present study were compared with previous postmortem studies exploring the quantitative relationship between Selvester QRS score and MI size in nonreperfused patients.
Results: The quantitative relationship between QRS score and MI size by DE-MRI in the present study of early reperfused MI was significantly different from previous postmortem histopathology studies of nonreperfused MI (P < 0.0001). In the present study, each QRS point represented approximately 2% of the left ventricle, compared to approximately 3% in previous postmortem histopathology studies of nonreperfused MI. When only considering small to moderate MI sizes, there was no significant difference in the quantitative relationship between QRS score and infarct size (P > 0.05).
Conclusions: There is a different quantitative relationship between QRS score and MI size in early reperfused MI compared to nonreperfused MI, partly explained by differences in MI size. Thus, the Selvester QRS scoring system may not be linearly related to MI size.
Ann Noninvasive Electrocardiol 2010;15(3):238–244