Published online before print January 22, 2004, 10.1148/radiol.2303030315
(Radiology 2004;230:824.)
A more recent version of this article appeared on March 1, 2004
Variations in Pulmonary Venous Drainage to the Left Atrium: Implications for Radiofrequency Ablation1
Edith M. Marom, MD,
James E. Herndon, MD,
Yun Hyeon Kim, MD2 and
H. Page McAdams, MD
1 From the Departments of Radiology (E.M.M., Y.H.K., H.P.M.) and Biostatistics and Bioinformatics (J.E.H.), Duke University Medical Center, Durham, NC. Received February 25, 2003; revision requested April 29; revision received June 19; accepted August 8. Address correspondence to E.M.M., Department of Radiology, Box 57, M. D. Anderson Cancer Center, Houston, TX 77030 (e-mail: emarom@di.mdacc.tmc.edu).

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Figure 1. Diagrams show right pulmonary venous drainage patterns. BSRLL = basilar segment right lower lobe pulmonary vein, RLL = right lower lobe pulmonary vein, RML = right middle lobe pulmonary vein, RUL = right upper lobe pulmonary vein, SSRLL = superior segment right lower lobe pulmonary vein. 1cm = distance from the ostium. Please see Table 1 for a description of the right pulmonary venous drainage patterns.
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Figure 2. Diagrams show left pulmonary venous drainage patterns. LLL = left lower lobe pulmonary vein, LUL = left upper lobe pulmonary vein. Please see Table 2 for a description of the left pulmonary venous drainage patterns.
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Figure 3. Anterior coronal-oblique shaded-surface CT scan of the left atrium (LA) obtained with thin-section (2.5-mm collimation) contrast-enhanced CT in a 75-year-old man with paroxysmal atrial fibrillation and R3a pattern shows three separate ostia for the right middle lobe vein (arrowhead), the right upper lobe vein (curved arrow), and the right lower lobe vein (straight arrow). The vascular structure between the curved arrow and the arrowhead is the right middle lobe artery.
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Figure 4. Posterior coronal-oblique shaded-surface CT scan of the left atrium (LA) obtained with thin-section (2.5-mm collimation) contrast-enhanced CT in an 82-year-old man with normal sinus rhythm and L2a pattern shows separate ostia for the left upper lobe (curved arrow) and the left lower lobe (straight arrow) pulmonary veins.
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Copyright © 2004 by the Radiological Society of North America.