What happens at a chest pain clinic?

[Pollypopsy]

Can they diagnose? What tests will they do?
I've had SVT for years but recently had several episodes of a sharpish pain followed by tightness and pain in left arm. Maybe four times in a month.
In between I'm fine.

I had an ECG and maybe an echo (I don't remember) then booked in for an MRI angiogram of coronary arteries later.

I wondered whether it would just be an ECG as I had one at the GPs and it didn't show anything. I wasn't sure whether ECG showed angina or whatever unless symptomatic at the time.

Seems like these are behind like the rest of the NHS because it should be two weeks and it's looking like at least five weeks.