Comparison of a QRS scoring system for estimating acute infarct size with radionuclide left ventriculography

A QRS scoring system was compared with left ventricular ejection fraction (LVEF) in 40 patients enrolled in the Multicenter Post Infarction Program. A poor correlation was found between these two parameters. Possible reasons for these findings include the fact that the radionuclide studies were performed at several institutions or that there was a mean interval of 6 days between the time of the ECG and the radionuclide studies. It was determined that the ECGs could be scored by inexperienced scorers. The utility and limitation of the QRS scoring system for prediction of LVEF need further evaluation, particularly if it is to be applied to a multicenter study.