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High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation
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Electrical and structural remodeling: role in the genesis and maintenance of atrial fibrillation

Bas A Schoonderwoerd1, Isabelle C Van Gelder, Dirk J Van Veldhuisen

  • 1Department of Cardiology, Thoraxcenter, University Medical Center Groningen, University of Groningen, RB Groningen, The Netherlands. b.a.schoonderwoerd@thorax.umcg.nl

Progress in Cardiovascular Diseases
|November 8, 2005
PubMed

Insights

Atrial remodeling, changes in atrial structure and function, is driven by both atrial fibrillation (AF) and congestive heart failure (CHF). Understanding these distinct remodeling processes is crucial for effective prevention and treatment strategies.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Pathophysiology

Background:

  • Atrial fibrillation (AF) and congestive heart failure (CHF) are common clinical conditions.
  • Both AF and CHF induce atrial remodeling, altering atrial function and structure.
  • Distinguishing the specific contributions of AF and CHF to atrial remodeling is challenging due to their frequent coexistence.

Purpose of the Study:

  • To review the ionic, electrical, contractile, neurohumoral, and structural changes involved in atrial remodeling.
  • To differentiate the roles of AF and CHF in initiating and maintaining atrial remodeling.
  • To inform primary and secondary prevention by tailoring treatments to specific remodeling types.

Main Methods:

  • Review of existing literature on atrial remodeling in the context of AF and CHF.
  • Analysis of studies dissecting the individual and combined effects of AF and CHF on atrial remodeling.
  • Evaluation of experimental models examining electrical and structural remodeling.

Main Results:

  • Atrial remodeling occurs due to atrial stretch from conditions like CHF, often preceding AF.
  • AF can lead to electrical remodeling (shortened refractoriness) due to rapid rates.
  • Structural remodeling is primarily driven by CHF or hypertension, not AF itself.

Conclusions:

  • Atrial remodeling is a complex process influenced by both AF and CHF, with distinct underlying mechanisms.
  • CHF and hypertension are significant drivers of structural atrial remodeling.
  • Tailored prevention and treatment strategies are necessary based on the specific type of atrial remodeling observed.

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