Sorry to inform you. Anxiety (a misnomer) is actually a dreadful
physical problem, but one that cannot be treated or kept in place.

This is happening because the arterial damage along with
heart and lung damage that go undetected and deliberately
ignored by doctors so that they can put you in the madhouse
when the things go otu of control.
The process is different from the one involved in the classical heart
disease when the patient has hypertension (which puts
some strain on the heart).
In endothelial dysfunction, the arteries remain opened,
loose their smoothe muscle lineage and the patient will
eventually develop "panick attacks" and eventually hypotension.
When the pain will start to show up, the heart is damaged
like after a heart attack even if you didn't have any.
Then it is close the time when a loose heart valve will break
and the heart will not be able to function even borderline.
This is the time when you start to experience "panick attack"
because the heart starts to race (beats much faster) to compen-
sate to its inefficiency.
It's all downhill from there to the psychiatric hospital and a
not so pleasant death.