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Fig. 2B —42-year-old woman with chronic thromboembolic disease. At slightly more caudal level, moderator band is well depicted (arrow) as it ramifies from interventricular septum to anterolateral wall of right ventricular apex. Moderator band conducts electrical apparatus of right bundle of His. Note also dilated segmental pulmonary artery in right lower lobe and evidence of intramural thrombus (arrowhead) resulting from chronic thromboembolic disease.