To compare the reproducibility of conventional gray-scale M-mode to color Doppler M-mode assessment of the septal-to-posterior wall motion delay (SPWMD) which is used as a marker of left ventricular mechanical dyssynchrony.
Division of Cardiology, Department of Medicine, University of Arizona College of Medicine, Sarver Heart Center, Tucson, Arizona 85724, USA. vsorrell@email.arizona.edu
