CONCORDANCE BETWEEN SPECKLE TRACKING ECHOCARDIOGRAPHY AND PHASE ANALYSIS OF MYOCARDIAL SPECT FOR LV SEGMENT OF LATEST MECHANICAL ACTIVATION

To determine concordance between speckle tracking echo and myocardial SPECT for the determination of the latest activated LV segment. Out of 187 patients enrolled in the Speckle Tracking Assisted Resynchronization Therapy for Electrode Region trial, 54 had both echo and SPECT at baseline, of whom