Left atrial cardiomyopathy: Pathophysiological insights, assessment methods and clinical implications

Area of Science:

• Cardiology
• Electrophysiology
• Pathophysiology

Background:

• Atrial cardiomyopathy encompasses structural, contractile, and electrical changes in the atria.
• Current understanding largely stems from animal models and atrial fibrillation patient samples.
• Noninvasive tools show promise for risk stratification of atrial fibrillation and related outcomes.

Purpose of the Study:

• To provide an overview of atrial cardiomyopathy's pathophysiological mechanisms.
• To discuss the interplay of factors like aging, pressure overload, metabolic, and genetic influences.
• To review current clinical tools for characterization and discuss clinical impact.

Main Methods:

• Literature review of pathophysiological mechanisms.
• Discussion of contributing factors: aging, pressure overload, metabolic disorders, genetics.
• Analysis of clinical tools: ECG, cardiac imaging, biomarkers.

Main Results:

• Atrial cardiomyopathy pathogenesis involves a complex interplay of multiple factors.
• Various noninvasive tools can characterize atrial cardiomyopathy.
• Atrial cardiomyopathy is linked to increased risk of atrial fibrillation, stroke, heart failure, and dementia.

Conclusions:

• A clinically relevant definition of atrial cardiomyopathy is crucial for improved treatment.
• Understanding atrial cardiomyopathy mechanisms aids in predicting adverse cardiovascular events.
• Further research is needed to refine diagnostic and therapeutic strategies.