Our expert says:
One could pass out during a panic attack, though it's much more usual for one to fear that one will, during such an attack, without actually passing out. From your description, the problem seems to be a fear of passing out, and related to dizziness, which could possibly be related to the op you had.
Having one's heart beat faster is part of the definition of a panic attack, and a normal part of it. And its typical that within panic attacks one feels out of control, and fears that one will go mad, or die, or both.
DO see a good local psychiatrist for a full assessment, and a comhination of CBT counselling and some medication can clear this up before long.
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