Clinical factors affecting symptom recurrence in patients with syncope

Area of Science:

• Cardiology
• Neurology

Background:

• Recurrent syncope significantly impacts patient quality of life, causing functional limitations and psychiatric distress.
• Identifying predictors of syncope recurrence is crucial for effective patient management.

Purpose of the Study:

• To prospectively investigate risk factors associated with syncope recurrence.
• To analyze the incidence and predictors of syncope recurrence in a diverse patient cohort.

Main Methods:

• A prospective study involving 289 patients with syncope from 2009-2010.
• One-year follow-up via telephone interviews every three months to track syncope recurrences.
• Statistical analysis including Kaplan-Meier curves and Cox regression to identify risk factors.

Main Results:

• Neurally mediated syncope (NMS) was the most common diagnosis (63%), followed by orthostatic hypotension (13%), cardiac syncope (12%), and unexplained syncope (12%).
• Overall, 6.6% of patients experienced syncope recurrence within one year.
• Recurrent syncope was significantly more frequent in patients with unexplained syncope (p < 0.01) and those with six or more prior syncopal episodes (p = 0.02).
• Cox regression identified >6 previous syncopal episodes (HR 5.38, p=0.03) and a trend towards unexplained syncope (HR 6.13, p=0.05) as significant predictors of recurrence.

Conclusions:

• Previous frequent syncope episodes and unexplained syncope are key indicators of higher recurrence rates.
• These findings aid in stratifying patients at risk for recurrent syncope and guiding further investigation and management.