I have read that our heart can think like our brain. Of course it doesn't have complete functionality of brain but it has its own consciousness. Is it true?
The general consensus of the scientific community would be that the human heart is not capable of consciousness.
The machinery behind consciousness is not well understood, of course, and there is quite a bit of debate, but it is thought that some minimum level of complexity is required in order for consciousness to arise. The human heart, while containing some neural circuitry, is very unlikely to reach this minimum level of complexity.