Analysis of high-frequency qrs components obtained from body surface potential mapping in anterior myocardial infarction

Analysis of high frequency components of the QRS complex in the standard twelve-lead ECG has been suggested as indicator for ischemia, as significant changes in morphology and voltage amplitude have been observed. Changes in high frequency components for old myocardial infarction are less specific and their advantages over the unfiltered ECG are unclear. However, lead positions outside the standard ECG have not been explored systematically. In this study, we extend the number of leads included in high frequency QRS analysis looking for differences between controls and old anterior myocardial infarctions by applying body surface mapping. Differences in the number of leads presenting reduction in the high frequency content of the QRS complex, as well as the temporal width of this reduction, have been found between patients and normals, suggesting markers for electrocardiographic assessment of conduction slowing