Nonalcoholic Fatty Liver Disease: An Emerging Driver of Cardiac Arrhythmia

Area of Science:

• Cardiology
• Hepatology
• Metabolic Disease

Background:

• Cardiac arrhythmias and sudden cardiac death are major health concerns.
• Nonalcoholic fatty liver disease (NAFLD) is increasingly recognized as a risk factor for cardiovascular complications.
• Existing research primarily links NAFLD to atrial fibrillation, but associations with ventricular arrhythmias and conduction defects are also noted.

Purpose of the Study:

• To review clinical evidence connecting NAFLD to cardiac arrhythmias.
• To elucidate the pathophysiological mechanisms underlying NAFLD-driven arrhythmias.
• To emphasize NAFLD as an independent risk factor for cardiac arrhythmias.

Main Methods:

• Review of existing clinical studies and mechanistic investigations.
• Synthesis of evidence on NAFLD's association with various types of cardiac arrhythmias.
• Exploration of proposed pathophysiological pathways.

Main Results:

• NAFLD is independently associated with an increased risk of cardiac arrhythmias.
• NAFLD can contribute to structural, electrical, and autonomic remodeling in the heart.
• Evidence suggests NAFLD plays a role in atrial arrhythmias, ventricular arrhythmias, and conduction defects.

Conclusions:

• NAFLD is a significant, often overlooked, risk factor for cardiac arrhythmias.
• Pathophysiological changes in NAFLD can create arrhythmogenic substrates in the heart.
• Further attention to NAFLD is warranted for understanding and managing cardiac arrhythmias.