Exploration of Predictive Biomarkers for Sudden Unexplained Cardiac Death in Nonelderly People: A Case-Control Study With Biochemical Parameters Related to Heart Failure

Area of Science:

• Cardiology
• Biomarkers
• Sudden Cardiac Death

Background:

• Sudden unexplained cardiac death (SUCD) can affect nonelderly individuals, including those with epilepsy or psychiatric disorders.
• The association between heart failure biomarkers and SUCD in these populations requires further investigation.

Purpose of the Study:

• To analyze the association between heart failure biomarkers and SUCD.
• To investigate serum concentrations of N-terminal probrain natriuretic peptide, high-sensitivity C-reactive protein (hs-CRP), and tumor necrosis factor α in SUCD patients.

Main Methods:

• Serum biomarker analysis in 57 nonelderly SUCD patients diagnosed via medicolegal autopsy.
• Patients categorized into subgroups: epilepsy, psychiatric disorders, and no specific medical history.
• Comparison of biomarker levels against control groups.

Main Results:

• Significantly elevated serum hs-CRP levels were observed in SUCD patients with epilepsy (P = 0.01) and psychiatric disorders (P = 0.01) compared to controls.
• Psychiatric patients with schizophrenia exhibited significantly higher hs-CRP levels than controls (P = 0.003) and other psychiatric conditions (P = 0.01).
• N-terminal probrain natriuretic peptide and tumor necrosis factor α levels did not differ significantly between SUCD patients and controls.

Conclusions:

• Elevated hs-CRP levels are associated with SUCD in nonelderly individuals with epilepsy or psychiatric disorders.
• High hs-CRP may indicate potential cardiac function impairment preceding SUCD.
• Further research is warranted to elucidate the role of hs-CRP in SUCD pathogenesis.