Dr. Wisenberg is a cardiologist at London Health Sciences Centre, who was trained in the seminal days of nuclear cardiology. He participated in the early human trials at UCLA assessing the role of PET in assessing regional myocardial perfusion. His career has involved the use of a number of imaging modalities including SPECT, PET, MRI, and CT with specific reference to their role in assessing response to therapy and in guiding the management of cardiac patients. His current research focus is on determining the optimum time to inject stem cells to maximize the likelihood for myocardial regeneration, and to improve means of prolonging the residence time of the stem cells in the heart so that they can exert the greatest degree of repair.