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There may not be any relation between the two.
The pressure rise might be incidental / whatever it is, it needs strict control.
You have not stated your personal habits, family history or co-morbidities, even age, gender...which could have an influence on the diagnosis and outcome...You have not even said what is the actual pressure!Hypothyroidism
will eventually emerge from the ablation / treatment has to be started and titrated over a period of time...
Wishing speedy recovery