Hello,for becoming a cardiac surgeon you have to keep science as your major subject,and in class eleventh take pcb (physics, chemistry,and biology)as your subject after that you have to give neet exam for getting admission in a medical College,as per rule for getting admission in a private college neet appearance should be there.

And after completing your mbbs (which is a five year course)then you have to do masters afrer that you can opt for cardiac surgeon study.Its a long pathway but interesting too.

Good luck