Abstract
With the development of the catheter ablation therapy, we have needed anatomical information not only to understand the data of 3-dimensional (3D) mapping, but also to avoid the complications associated with catheter manipulation. Especially, we have to obtain a detailed knowledge of the anatomy of left atrium (LA) and its surroundings. Of course, we have been performing catheter ablation looking back over cardiac anatomy for the past twenty years. However, we recognized that there are many unknown structures in LA.
In this article, I will choose the following specific structures located in LA and demonstrate them within the pages I ampermitted.
(1)LA roof vein
(2)Diverticulum of anterior LA wall
(3)The translucent area of anterior LA wall
(4)Transverse myocardial bundle of anterior LA wall
(5)Accessory left atrial appendage
(6)Myocardial bridge
(7)Atrial muscle defect area
