George J. Klein is a Canadian cardiologist and cardiac electrophysiologist, currently serving as Professor of Medicine at Western University in London, Ontario, Canada.
Klein graduated from the University of Toronto in 1972.
Klein's research focused on cardiac arrhythmia, particularly WolffâÂÂParkinsonâÂÂWhite syndrome, the surgical and ablative management of heart rhythm disturbances and the understanding of syncope.