Cardiac arrhythmias are tackled by drugs, devices, electricity etc. How about using the light energy ?
It would be sort of revolution if we could tame dangerous cardiac arrhythmias by optical energy.Exciting new developments are happening at Jhon Hopkins.The emerging field is optogenetics.Preliminary mouse and human MRI models suggest red light has a unique property to interrupt electrical signals in cardiac tissues.(Tissue level induction of light sensitive protein?).It has been shown to revert ventricular arrhytmias.
Reference
https://www.eurekalert.org/pub_releases/2016-09/uob-tol090816.php
A preview
Curious thoughts and a corollary in Hindu mythology
There are anecdotal reports in vedic Indian literature where super powered sky Gods equipped with the power of light (Lightening/IR rays ? ) can bring life to dead man on earth . . . Is it the same optical defibrillation we are talking about now ?
Dr.S.Venkatesan MD 
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