Optical Control of Cardiomyocyte Depolarization and Inhibition Utilizing Channelrhodopsin-2 (ChR2) and a Third Generation Halorhodopsin (eNpHR3.0) Circulation Shirley Park, Ragu Vijaykumar, Paul G. Yock, Paul J. Wang, Karl Deisseroth 2010; 122 (21): A14882