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Figure 1 Pattern of endocardial radiofrequency lesions. In this schematic view the atria are opened superiorly and the anterior and posterior parts of the atria laid flat to expose the endocardial surface. SVC = superior vena cava; IVC = inferior vena cava; CS = coronary sinus; RSPV = right superior pulmonary vein; RIPV = right inferior pulmonary vein; LSPV = left superior pulmonary vein; LIPV = left inferior pulmonary vein.
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