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This could mean Transient ischemic Attacks.
Neurological examination, MRI brain and MRA (MRI Angiography
) of the blood vessels supplying the brain may clinch..
The eyes should be looked into - for glaucoma
(slow rate here) could be causative. ECG, Holter and ECHOcardiography
may shed light.
It doesn't sounds like a complicated problem to diagnose or treat.
Take her to a doctor.
Wishing speedy recovery