Worsening of symptoms before presentation with vasovagal syncope.

Introduction: Much of the natural history of vasovagal syncope is unknown. We determined whether patients presenting for care have had a recently worsened syncope frequency.

Methods And Results: We compared 208 subjects in the referral-based Prevention of Syncope Trial (POST) and 122 subjects who fainted > or =1 in a community survey study.

Vasovagal syncope in medical students and their first-degree relatives.

Aims: To determine the effect of family history on the likelihood of vasovagal syncope.

Methods And Results: Sixty-two medical students and 228 first-degree relatives were studied. Vasovagal syncope was ascertained with the Calgary syncope symptom score.