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Anatomy of the right atrial appendage and its importance in clinical practice

Jiani Zhang1, Mingyuan Yuan2

  • 1Department of Radiology, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital No. 1500, Shanghai, China.

Folia Morphologica
|July 31, 2023
PubMed

Insights

Understanding the right atrial appendage anatomy is crucial for cardiac procedures. Its structure impacts electrode implantation success and its role in atrial fibrillation requires more research.

Area of Science:

  • Cardiovascular Anatomy
  • Clinical Cardiology
  • Interventional Electrophysiology

Background:

  • The right atrial appendage (RAA) is a key anatomical feature of the right heart.
  • Recent advancements in cardiology highlight the growing clinical significance of the RAA.
  • This review synthesizes current research on RAA anatomy and its clinical implications.

Purpose of the Study:

  • To summarize the current understanding of right atrial appendage anatomy.
  • To review the clinical value and applications of the right atrial appendage.
  • To consolidate and enhance existing data on the RAA.

Main Methods:

  • Literature review and data synthesis.
  • Comparative anatomical analysis (RAA vs. left atrial appendage).
  • Analysis of clinical interventional therapy data.

Main Results:

  • The RAA has a flat outer surface with internal structures including the terminal crest and pectinate muscles.
  • RAA wall and pectinate muscle thickness are critical factors for successful atrial lead implantation.
  • While a potential site for thrombus formation in atrial fibrillation, the RAA has a lower incidence compared to the left atrial appendage.

Conclusions:

  • Detailed knowledge of right atrial appendage anatomy is essential for effective atrial lead implantation.
  • Further investigation is needed to fully elucidate the role of the right atrial appendage in atrial fibrillation pathogenesis and management.

Keywords:
atrial fibrillationatrial leadprogressthrombosis

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