Brain, heart, and sudden death

Area of Science:

• Neuroscience and Cardiology
• Sudden Death Pathophysiology

Background:

• Coronary artery disease (CAD) rates have decreased, yet sudden death (SD) rates have not proportionally declined, indicating other contributing factors.
• The etiology of SD remains undetermined in a significant number of cases, suggesting a need to broaden the scope beyond cardiac causes.
• Current research predominantly focuses on cardiac mechanisms of SD, with limited attention to neurological factors or the interplay between brain and heart.

Purpose of the Study:

• To review pathological findings in heart autopsies of SD victims, particularly those exposed to psychological stressors.
• To summarize recent research on brain regions, such as the insula, implicated in SD.
• To propose a unified perspective on SD risk factors, integrating both brain and heart contributions, and to explore prevention strategies.

Main Methods:

• Review of pathological findings from heart autopsies in SD victims.
• Summary of neuroimaging and neurological studies investigating brain involvement in SD.
• Analysis of literature on neurological diseases, psychological stressors, and heart failure-related SD.

Main Results:

• Pathological cardiac findings in SD victims following psychological stress are reviewed.
• Emerging evidence links brain area dysfunction, including the insula, to SD.
• The connection between neurological conditions, psychological stressors, heart failure, and SD is highlighted.

Conclusions:

• A comprehensive understanding of SD requires considering both cardiac and neurological factors.
• The brain plays a critical role in the pathophysiology of SD, often in conjunction with cardiac issues.
• Future prevention strategies for SD should adopt a brain-heart integrated approach.