Syncope is associated with altered mental status.<ref name="ShenDecker2004">{{cite journal|last1=Shen|first1=Win K.|last2=Decker|first2=Wyatt W.|last3=Smars|first3=Peter A.|last4=Goyal|first4=Deepi G.|last5=Walker|first5=Ann E.|last6=Hodge|first6=David O.|last7=Trusty|first7=Jane M.|last8=Brekke|first8=Karen M.|last9=Jahangir|first9=Arshad|last10=Brady|first10=Peter A.|last11=Munger|first11=Thomas M.|last12=Gersh|first12=Bernard J.|last13=Hammill|first13=Stephen C.|last14=Frye|first14=Robert L.|title=Syncope Evaluation in the Emergency Department Study (SEEDS)|journal=Circulation|volume=110|issue=24|year=2004|pages=3636–3645|issn=0009-7322|doi=10.1161/01.CIR.0000149236.92822.07}}</ref>
* Syncope is associated with altered mental status.