Dear friend, welcome to HCM.
there are many causes of this dizziness
can you elaborate more as to what else happens?
nausea? missed/ heavy heart beats? sweating, loss of consciousness? do you fall down?
have memory of the event?
it may be a heart rhythm disorder
, autonomic imbalance, neurogenic syncope
pl. feed more details for a better answer.
I hope to have answered your query satisfactorily.
Take care and please keep me informed of your progress.
Good Luck !
May I request you to rate your experience here before you close.