Assessment of regional and global left ventricular function with electromechanical mapping: validation against MRI. A PRECISE substudy

Background Electromechanical mapping (EMM) of the left ventricle (LV) provides voltage and contractility information of the LV (based on linear local shortening, LLS). Although EMM parameters show excellent correlation with viability data by MRI, little information is available regarding performance of EMM for assessment of regional and global LV function. The purposes of our study were: a) to study the relationship between EMM (LLS) and wall motion by MRI in all segments and b) to correlate LV volumes and LVEF with both techniques.