Hey,

Bcvt includes the following-

Current management of various cardiac disorders includes complex diagnostic and therapeutic procedures, which involve use of various equipment, computer hardware, tools, machines, and pharmacological agents. Handling of these equipment and tools as well as their regular maintenance requires advanced and focused knowledge of the scientific principles on which the tests and equipment function, as well as to have hands-on skill in using these equipment correctly and safely.

Due to less supply,demand and scope for the field is present.

Perfusion tech-

They are the healthcare professionals who will be identity operating the cardiopulmonary bypass machine or the heart-lung machine while the cardiac medical procedure. This heart-lung machine will manages the patient physiological status

The scope is more or less the same for both fields you have to decide for yourself which one of the fields excites you and is the best for you.

Hope this helps.

If you have any doubts use the comment section.