Anatomy

Radiology

Left atrium

Atrial fibrillation

Interatrial septum

Atrium (architecture)

Magnetic resonance imaging

Cardiology

Fossa ovalis

Atrioventricular Septal Defect

Heart disease

Percutaneous

Medicine

Journal of the American Society of Echocardiography

Interest in the anatomy of the interatrial septum (IAS) and its adjoining atrioventricular (AV) junction has risen enormously in the past two decades with the simultaneous evolution of left-sided percutaneous structural heart disease and complex electrophysiologic procedures. These procedures require, in fact, a direct route to the left atrium through the IAS. Thus, a thorough understanding of the complex anatomy of the IAS and AV junction is essential for performing a safe and effective transseptal puncture.

Revisiting Anatomy of the Interatrial Septum and its Adjoining Atrioventricular Junction Using Noninvasive Imaging Techniques