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[Pathophysiology of the renin-angiotensin-system in atrial fibrillation]

G Heusch1, R Schulz

  • 1Institut für Pathophysiologie, Universitätsklinikum Essen. gerd.heusch@uni-essen.de

Deutsche Medizinische Wochenschrift (1946)
|April 12, 2006
PubMed

Insights

Cardiovascular diseases linked to the renin-angiotensin-system, like heart failure and hypertension, often trigger atrial fibrillation. Medications targeting this system may reduce atrial fibrillation risk, but more research is needed.

Area of Science:

  • Cardiology
  • Pharmacology
  • Pathophysiology

Context:

  • Cardiovascular diseases (CVDs) such as myocardial infarction, heart failure, and hypertension are frequently associated with activation of the renin-angiotensin-system (RAS).
  • Atrial fibrillation (AF) is a common complication of these cardiovascular conditions.
  • RAS activation in the atria contributes to AF pathophysiology through inflammation, oxidative stress, and fibrosis.

Purpose:

  • To explore the role of the renin-angiotensin-system in the development and maintenance of atrial fibrillation.
  • To evaluate the potential of RAS-targeting therapies in reducing AF risk.

Summary:

  • Activation of the renin-angiotensin-system in cardiovascular diseases contributes to atrial fibrillation by promoting atrial remodeling, inflammation, oxidative stress, and fibrosis.
  • This remodeling leads to altered electrophysiological properties, including decreased conduction velocity and abbreviated refractory periods, facilitating reentrant circuits.
  • A meta-analysis indicated that ACE inhibitors and AT(1) blockers reduce the relative risk of atrial fibrillation by approximately 30%.

Impact:

  • The findings suggest that targeting the renin-angiotensin-system may be a viable strategy for preventing or treating atrial fibrillation in patients with cardiovascular diseases.
  • Further prospective randomized clinical studies are necessary to confirm these benefits and establish definitive evidence for clinical practice.

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