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Cardiac catheterisation is an invasive investigation.
It is not generally done, unless there are strong pointers to heart problem.
Your description does not directly point to the heart - but then, there are other non-invasive investigations like ECG, ECHOcardiogram
, TMT and so on that must have prodded you doctor for the cath. It is hence likely that there is a strong suspicion of heart involvement in your case.
Obviously, there is a problem of cervical spine
But that one does not exclude the other.
Wishing speedy recovery