Epidemiology and genetics of ventricular fibrillation during acute myocardial infarction

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology

Background:

• Sudden cardiac death (SCD) from ventricular fibrillation (VF) is a major cause of mortality, often presenting as the first symptom of coronary artery disease (CAD).
• Epidemiological studies suggest a genetic susceptibility to VF during myocardial infarction (MI), independent of traditional risk factors, highlighting the need to understand underlying genetic mechanisms.

Approach:

• A comprehensive literature search was conducted using PubMed with MeSH terms including 'sudden cardiac death', 'ventricular fibrillation', 'myocardial infarction', 'coronary artery disease', and 'genetics'.
• This review synthesizes current evidence on the epidemiology and genetic predisposition to VF in the context of MI.

Key Points:

• Family history of sudden death is a risk factor for VF during MI.
• Despite technological advances, the genetic basis for VF during MI remains poorly understood.
• Previous genetic studies have yielded inconsistent findings regarding common and rare variants associated with VF or SCD.

Conclusions:

• Further research is needed to elucidate the genetic and molecular mechanisms underlying VF in patients with CAD.
• Identifying genetic predispositions can improve the prevention of SCD and VF during MI.
• Reproducible genetic findings are essential for understanding VF susceptibility in apparently healthy individuals with CAD.