Multimodality imaging predictors of sudden cardiac death

Area of Science:

• Cardiology
• Medical Imaging
• Cardiac Electrophysiology

Background:

• Sudden cardiac death (SCD) is a critical event in cardiomyopathies.
• Current guidelines rely solely on left ventricular ejection fraction (LVEF) for implantable cardioverter-defibrillator (ICD) selection, leaving many high-risk patients undertreated.

Purpose of the Study:

• To review advanced imaging modalities for SCD risk stratification in cardiomyopathies.
• To explore the role of tissue characterization, particularly scar detection, in identifying high-risk individuals.

Main Methods:

• Review of evidence for advanced echocardiography, cardiac magnetic resonance (CMR), and nuclear cardiology.
• Focus on modalities aiding in tissue characterization and scar identification.

Main Results:

• Advanced imaging offers more sensitive and specific markers for SCD risk than LVEF alone.
• Scar detection via these modalities is crucial for understanding arrhythmia pathogenesis.

Conclusions:

• Integrating advanced echocardiography, CMR, and nuclear cardiology can refine SCD risk stratification in cardiomyopathies.
• These techniques address limitations of current guidelines, improving patient selection in ambiguous cases.