If your BP is staying in a safe range, I don't see how it can be a problem. If your BP does spike but you can control it, that's OK, too. You are not having convulsive seizures nor absence seizure where you lose awareness of your surroundings.

In my opinion, they are an anxiety like event even though you may not recognize a trigger. These can be self-perpetuating. In the quiet, you hear and feel the pulse, your brain zones in on it and becomes focused to the point of almost being obsessed. This increases adrenaline and even magnifies the sensation. This may or may not be your case.

Even people without PCS experience these 'out of the blue' anxiety events.

If they become chronic and are identifiable on an EEG, the neuro would prescribe anti-seizure meds. That is to be avoided if possible.

My best to you.