[Atrail fibrillation and heart failure: a complex relationship]

Area of Science:

• Cardiology
• Electrophysiology
• Heart Failure Research

Context:

• Atrial fibrillation (AF) and heart failure (HF) are highly prevalent and often comorbid cardiovascular conditions.
• The bidirectional relationship between AF and HF presents complex challenges in patient management.
• Understanding the intricate mechanisms linking these two diseases is crucial for therapeutic advancements.

Purpose:

• To elucidate the complex interplay and shared etiological factors between atrial fibrillation and heart failure.
• To explore the mechanisms by which AF can precipitate or worsen HF, and vice versa.
• To discuss the implications for clinical management and emerging therapeutic strategies, including non-channel targeted therapies.

Summary:

• AF and HF share common underlying causes and each can directly lead to the other.
• AF contributes to HF through loss of synchrony, irregular/rapid ventricular response, and tachycardia-induced cardiomyopathy.
• HF promotes AF via increased atrial mass, stretch, neuroendocrine changes, and fibrosis, with prevalence increasing with HF severity.
• AF's impact on HF prognosis is variable, particularly in advanced stages, influencing management decisions.
• Rhythm vs. rate control trials and novel therapies like non-channel target therapy offer insights for managing AF in HF patients.

Impact:

• Provides a comprehensive overview of the AF-HF relationship, aiding clinicians in diagnosis and treatment.
• Highlights the importance of considering the bidirectional nature of AF and HF in clinical practice.
• Suggests potential avenues for future research and therapeutic development in managing comorbid AF and HF.