Dear Aspirant,
No its not possible to become a Cardiologist after BSc only, without completion of MBBS and MD.
To Become a cardiologist you must complete MBBS degree or continue the higher studies Msc in Cardiology combined with Master of surgery or MD in Cardiology.
For more info you can visit the below provided link.
https://www.careers360.com/courses/cardiology-and-thoracic-science-course
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