Drs. Ghosh, Cooper, Vijayakumar, and Zhang contributed equally to the data analysis for this report. The study was supported by Grant 5R01-HL-33343 and Grant R01-HL-49054 from the National Heart, Lung, and Blood Institute to Dr. Rudy. Dr. Rudy is the Fred Saigh Distinguished Professor at Washington University in St. Louis, is co-chair of the scientific advisory board, and holds equity in CardioInsight Technologies (CIT). CIT does not support any research conducted by Dr. Rudy, including that presented here.