An Indian scientist has claimed that evidence from people suffering from heart disease supports the existence of the molecular link first discovered in laboratory mice between the body’s natural circadian rhythms and cardiac arrest or sudden cardiac death. Mukesh Jain, M.D., said that it pinpoints a previously unrecognised factor in the electrical storm that makes the heart’s main pumping chambers suddenly begin to beat erratically in a way that stops the flow of blood to the brain and body.