Long-term outcomes in psychogenic pseudosyncope

Background

Psychogenic Pseudosyncope (PPS) is a functional disorder characterized by apparent transient loss of consciousness. Current guidelines emphasize communicating the diagnosis as a primary therapeutic intervention. However, long-term data regarding the trajectory of PPS, the efficacy of specific interventions, and the relationship between patient understanding and clinical outcomes remain limited.

Purpose

To evaluate long-term prognosis, assessing symptom frequency, daily life impact, and comorbidity burden. We also analyzed patient perception of helpful treatments to identify management patterns between symptomatic and asymptomatic cohorts.

Methods

A long-term follow-up (mean 9.2 ± 3.0 years) of 34 patients with confirmed PPS. Participants were stratified into four analytical groups based on: (1) episode frequency, (2) impact on daily life, (3) receipt of clear diagnostic information, and (4) presence of ongoing symptoms.

Results

Participants were predominantly female (85.3%). While 82.4% reported a reduction in episode frequency since diagnosis, total remission occurred in only 29.4% (10/34). Recurrent syncope was the primary driver of functional impairment; 100% of those reporting an impact on daily life experienced continuation of episodes (p < 0.001).

Patients with frequent episodes (daily, weekly, or monthly) were significantly more likely to have comorbid anxiety disorders (41.7% vs. 4.5%, p = 0.014) than those with infrequent episodes. Management preferences diverged significantly between these groups. Patients with frequent episodes were significantly more likely to attribute benefit to cardiovascular medications (pulse-lowering/ anti-hypotensive) rather than psychiatric drugs (p = 0.013) and cited Cardiologists as the most helpful professionals. In contrast, those with infrequent episodes attributed benefit to psychiatric/neurologic medications and lifestyle changes, citing GPs as most helpful.

Unexpectedly, an "information paradox" emerged. Patients who recalled receiving clear information about the psychogenic nature of their diagnosis were significantly younger (median 34.6 vs. 45.8 years, p = 0.025) but were significantly more likely to report frequent ongoing episodes compared with those who did not recall receiving such information (58.3% vs. 22.7%, p = 0.038).

Conclusion

Long-term total remission in PPS is difficult to achieve, although symptom reduction is common. The paradoxical association between recalled diagnostic information and higher episode frequency challenges the assumption that education alone drives improvement; it suggests that patients with severe, persistent symptoms may retain diagnostic labels more vividly. Furthermore, the reliance of symptomatic patients on cardiac medications implies a potential overlap with autonomic dysfunction, suggesting that integrated care models addressing both functional and physiological components are required for refractory cases.PPS Table 1