Sudden cardiac death risk stratification

Area of Science:

• Cardiology
• Preventive Medicine
• Biomedical Engineering

Background:

• Arrhythmic sudden cardiac death (SCD) is a major public health concern, primarily caused by ventricular tachycardia/fibrillation (VT/VF) or pulseless electrical activity/asystole.
• Most research on SCD risk stratification focuses on VT/VF, with less attention paid to pulseless electrical activity/asystole.
• Effective risk stratification is essential for allocating healthcare and research resources efficiently to combat SCD.

Purpose of the Study:

• To review existing and novel risk stratification tools for SCD due to VT/VF.
• To highlight the need for improved risk assessment, particularly in populations without known cardiac disease.

Main Methods:

• Review of current literature on risk stratification tools for SCD-VT/VF.
• Discussion of advances in imaging, cardiac autonomic function, and repolarization measures.
• Exploration of biomarkers and novel imaging for general population risk stratification.

Main Results:

• Advances in imaging, autonomic function, and repolarization show promise for refining risk in patients with left ventricular dysfunction or myocardial infarction.
• A significant portion of SCD-VT/VF occurs in individuals without previously diagnosed cardiac conditions.
• Biomarkers and novel imaging may offer enhanced risk stratification beyond traditional coronary artery disease risk factors.

Conclusions:

• Despite progress, significant challenges persist in SCD risk stratification.
• Further development and validation of risk stratification tools are necessary to impact SCD rates meaningfully.
• Identifying at-risk individuals, especially in the general population, remains a critical unmet need.