Thank you for your query on Healthcare Magic.
episode is looking like syncope
most probably because of vasovagal syncope.
Prolonged standing will lead to this condition.
Some times low blood pressure due to orthostatic hypotension
also presents with fainting.
Her blood pressure is checked to look for low blood pressure and for orthostatic hypotension.
Other investigations like ECG, EEG, 2D Echo to be done to rule out any underlying cardiac and neuro problems such as seizures.
Hence take her to the doctor for clinical examination and for investigations.
Hope I have answered your query.