Cardiology
Cardiology here covers interventional and surgical treatment of the heart and coronary arteries — angioplasty and stenting, cardiac ablation for rhythm disorders, valve procedures and bypass surgery — together with the imaging and testing that precede them. Cardiac care is the category where travelling deserves the most caution, because it is also the category where an unplanned complication is least compatible with a long flight. The CDC advises delaying air travel for 10–14 days after major chest surgery. Before committing, establish who will manage your anticoagulation and follow-up once you are home, and confirm the hospital's intensive-care capability rather than only its price.
Procedures in Cardiology

A catheter-based procedure that uses radiofrequency or cryo (freezing) energy to destroy small areas of heart tissue responsible for abnormal heart rhythms.

A minimally invasive, catheter-based procedure that opens narrowed or blocked coronary arteries with a balloon and a stent to restore blood flow to the heart.
Frequently asked questions
Does U.S. insurance cover heart surgery abroad?
Most U.S. health plans do not pay for elective surgery abroad, and cosmetic procedures are not covered at all. The CDC warns that care for complications after surgery abroad may not be covered either.