VISUALIZATION AND ANALYSIS OF ELECTRODYNAMIC BEHAVIOR DURING CARDIAC ARRHYTHMIAS By Mark-Anthony P. Bray Dissertation Submitted to the Faculty of the Graduate School of Vanderbilt University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY in Biomedical Engineering May, 2003 Nashville, Tennessee Approved by: Professor John P. Wikswo Professor Shien-Fong Lin Professor Robert L. Galloway Professor Robert J. Roselli Professor Richard G. Shiavi