Sudden unexplained death in individuals with and without epilepsy.

Area of Science:

• Forensic Pathology
• Neurology
• Cardiology

Background:

• Sudden unexplained death (SUD) is a critical public health concern.
• Sudden unexpected death in epilepsy (SUDEP) is a specific subset of SUD.
• Understanding the distinct characteristics of SUDEP is crucial for prevention strategies.

Purpose of the Study:

• To compare the demographics, circumstances, comorbidities, autopsy findings, toxicology, and prescription claims between SUD without epilepsy and SUDEP.
• To identify risk factors and characteristics differentiating SUDEP from other SUD cases.

Main Methods:

• Retrospective analysis of nationwide forensic autopsy and toxicology reports in Denmark (2000-2019).
• Inclusion of SUD cases aged 1-49 years, defined by specific cardiac and toxicology criteria.
• Identification of SUDEP cases using Danish health registries for epilepsy-related hospitalizations and antiseizure medication (ASM) claims.

Main Results:

• Out of 477 SUD cases, 84 (18%) were identified as SUDEP.
• SUDEP cases showed significantly higher rates of unwitnessed death (93% vs. 75%), solitary living (56% vs. 42%), and psychiatric comorbidity (36% vs. 19%) compared to SUD without epilepsy.
• SUDEP cases had a lower prevalence of subdiagnostic cardiac hypertrophy and a higher prevalence of proarrhythmic drug claims and postmortem proarrhythmic drugs, largely due to ASM use.

Conclusions:

• SUDEP is associated with distinct demographic and clinical factors, including unwitnessed events, living alone, and psychiatric comorbidities.
• Recommendations include enhancing psychiatric care and supervision for individuals with epilepsy.
• Emphasizes the importance of cardiac evaluations for arrhythmias before and during ASM treatment to potentially mitigate SUDEP risk.