Complex sentence: After this, an interventional cardiologist can perform coronary angioplasty, in which a deflated balloon is advanced into the obstructed artery and inflating it to relieve the narrowing; certain devices such as stents can be deployed to keep the blood vessel patent.
Split into simpler sentences: After this, an interventional cardiologist can perform various treatments such as coronary angioplasty, in which a deflated balloon is advanced into the obstructed artery and inflating it to relieve the narrowing. Various devices such as stents can be deployed to keep the blood vessel patent.