Q: What makes up (from top to bottom) the right cardiomediastinal border?
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A: Right paratracheal stripe, arch of the azygous vein, superior vena cava (or ascending aorta in older pts), right atrium, inferior vena cava (IVC)
Q: What makes up (from top to bottom) the left cardiomediastinal border?
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A: Left paratracheal stripe (made up of left common carotid artery, left subclavian artery and the left jugular vein), aortic arch, pulmonary artery, auricle of left atrium, left ventricle.
Q: When visible, where is the aortic nipple and what structure accounts for it?
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A: The aortic nipple is a small protuberance from the aortic knuckle, seen on frontal chest radiograph. It is due to the superior intercostal vein.
Q: What makes up (from top to bottom) the anterior cardiomediastinal border?
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A: Superior mediastinum (great vessels & thymus), ascending aorta, right ventricular outflow tract, right ventricle.
Q: What makes up (from top to bottom) the posterior cardiomediastinal border?
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A: Left atrium and pulmonary veins, left ventricle, inferior vena cava.