Hi Aspirant

Any kind of specality like medicine,cardiac,surgery ...etc can be only done if you are already MBBS.If you are MBBS then you can appear in PG entrance examination and on the basis of rank and marks you can get these speciality courses.

First of all these are the medical colleges in Delhi : https://medicine.careers360.com/colleges/ranking/2018/top-medical-colleges-in-delhi

You can check courses by clicking on the names of college after visiting the link.You will get to know each and everything about the college.

All the best.