No you can't pursue fields like :

• cardiology
• Orthopedic
• Anesthesiologist
• Radiologist .. etc.

Although you have a opportunity to pursue a MD course in the fields mentioned below:

• Panchkarma
• Gynecology
• Pediatric
• General Medicine
• Pathology
• Swasthvrutta
• Rasshastra and Bhaisajyakalpana
• Charak samhita
• Shalakya Tantra etc

As you have understood that you can only do MD in ayurvedic subjects nothing except that.

I hope my answer helps you. Wish you all the best for your future endeavors!