first of all thanks for giving a nice history of events what all happened.Your mother is a 73 yr old diabetic,hypertensive, n had high cholesterol;but she was healthy n keeping fit.With these risk factors for stroke,sudden onset of head ache with eye pain ,confusion n impairment of speech wih EKG confirming atrial fibrillation
will first think of embolic stroke to brain vessels from heart or a form of transient ischemic attack
TIA) n thats why she was put on blood thinners.But in old age electrolyte distubances like low sodium,potassium,magnesium
can also lead to acute confusion n some times severe drowsiness
may be the cause of defaecation at socially forbidden places.TIA would have resolved orthe electrolyte disturbances would have been corrected .hence she regained consciousness.