Related Experiment Video

Updated: Jun 17, 2026

Three-Dimensional Modeling of the Left Atrium and Pulmonary Veins with a Precise Intracardiac Echocardiography Approach
04:29

Three-Dimensional Modeling of the Left Atrium and Pulmonary Veins with a Precise Intracardiac Echocardiography Approach

Published on: June 30, 2023

Anatomy of the left atrium for interventional electrophysiologists

Siew Yen Ho1, Karen P McCarthy

  • 1National Heart & Lung Institute, Imperial College London, London, UK. yen.ho@imperial.ac.uk

Pacing and Clinical Electrophysiology : PACE
|December 23, 2009
PubMed

Insights

This study reviews left atrial anatomy crucial for interventional procedures. Understanding the left atrium

Area of Science:

  • Cardiovascular Anatomy
  • Interventional Cardiology

Background:

  • Interventional procedures increasingly require left atrial access from both internal and pericardial spaces.
  • Key anatomical structures surrounding the left atrium, including nerves and the esophagus, are critical considerations.

Purpose of the Study:

  • To review the anatomical components of the left atrium relevant to interventional electrophysiologists.
  • To highlight specific features of the atrial septum, mitral isthmus, and atrial walls.

Main Methods:

  • Review of anatomical literature focusing on the left atrium.
  • Emphasis on structures pertinent to interventional procedures.

Main Results:

  • Detailed description of the left atrial septum, ridge, mitral isthmus, and walls.
  • Identification of common anatomical variations like pits and crevices.
  • Mapping of interatrial muscular connections, including Bachmann's bundle and venous sleeves.

Conclusions:

  • Comprehensive understanding of left atrial anatomy is vital for safe and effective interventional procedures.
  • Awareness of phrenic nerve and esophageal proximity is essential.
  • Detailed anatomical knowledge aids electrophysiologists in navigating complex cardiac structures.

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