New concepts in atrial fibrillation pathophysiology

Area of Science:

• Cardiology
• Electrophysiology
• Biomedical Engineering

Background:

• Current atrial fibrillation (AF) classification relies on episode duration and termination, inadequately representing underlying atrial disease severity.
• This approach fails to capture the progressive nature of atrial pathology contributing to AF.
• A need exists for a more comprehensive classification system reflecting the disease process.

Purpose of the Study:

• To introduce and discuss "atrial cardiomyopathy" as a novel concept in AF pathophysiology.
• To explore measures and parameters for assessing atrial cardiomyopathy.
• To highlight the potential impact of this new concept on AF classification and clinical management.

Main Methods:

• Literature review focusing on recent advancements in AF pathophysiology and classification.
• Synthesis of data from electrogram, imaging, and biomarker studies.
• Analysis of the clinical implications of incorporating atrial cardiomyopathy into AF assessment.

Main Results:

• Atrial cardiomyopathy provides a framework to understand AF beyond mere rhythm disturbance.
• Various electrogram, imaging, and biomarker metrics can quantify atrial cardiomyopathy.
• These measures offer objective insights into atrial disease progression.

Conclusions:

• The concept of atrial cardiomyopathy offers a more complete understanding of AF.
• Objective assessment of atrial cardiomyopathy is feasible using current technologies.
• Integrating atrial cardiomyopathy into AF classification and management is likely to improve patient outcomes.