Hey!

to become a lab technician you need to do certain courses after your class 12th. or even after your basic degree like BSc.

the courses are

Diploma in Medical Laboratory Technology (DMLT)

or a Certificate in Medical Laboratory Technology (CMLT),

or a BMLT (Bachelor of Medical Laboratory Technology degree)

these courses are after 12th. for lab tech after BSc (any science) you can directly approach a lab and get a job.

lab technician is good. but i would say, your previous ambition was good. to become a cardio vascular technologist.

i hope it helps you