Table of Contents
ISRN Pulmonology
Volume 2012, Article ID 786549, 4 pages
Research Article

Variations in Draining Patterns of Right Pulmonary Veins at the Hilum and an Anatomical Classification

Department of Anatomy, Bangalore Medical College & Research Institute, Bangalore 560 002, India

Received 28 February 2012; Accepted 9 May 2012

Academic Editors: B. O. Ibe and S. D. Qanadli

Copyright © 2012 M. S. Rajeshwari and Priya Ranganath. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Pulmonary veins carry oxygenated blood from the lungs to the left atrium. Variations are quite common in the pattern of drainage. The present study was undertaken to evaluate the incidence of different draining patterns of the right pulmonary veins at the hilum by dissecting the human fixed cadaveric lungs. Clinically, pulmonary veins have been demonstrated to often play an important role in generating atrial fibrillation. Hence, it is important to look into the anatomy of the veins during MR imaging and CT angiography. In 53.8% of cases, the right superior lobar vein and right middle lobar vein were found to be united together to form the right superior pulmonary vein. In contrast to this, in 11.53% of cases, right middle lobar vein united with the right inferior lobar vein to form the right inferior pulmonary vein, while in 26.9% of cases, the right superior lobar vein, right middle lobar vein, and right inferior lobar vein drained separately.