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CHAPTER 6: ANATOMICAL VARIANTS AND ULTRASOUND ARTIFACTS
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Select the one best answer for each question.
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1. Identify the structure:
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a. Chiari network. This is a sinus venosus–derived structure that is characterized by a fenestrated, undulating appearance.
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2. Identify the artifact:
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b. Mirror image. This is a mirror image of an aorta with an intra-aortic balloon pump in it. Note that the false image of the balloon pump (arrow) is distant to the real image.
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3. Identify the structure at the arrow:
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c. Mitral annular calcification
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d. Lipomatous hypertrophy of the interatrial septum
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b. This is a myxoma. The patient also has lipomatous hypertrophy of the interatrial septum, but the arrow is pointing to the myxoma.
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4. Identify the variant or pathology:
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c. Lipomatous hypertrophy of the interatrial septum
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a. This is an atrial septal defect, not a normal anatomical variant.
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5. What is the artifact seen?
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c. This is a large acoustic shadow from the strut of a mechanical valve in the mitral position, which makes evaluation of distal structures difficult.
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6. Identify the structure at the arrow:
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d. Left ventricular thrombus
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d. This is a left ventricular (LV) thrombus. It is not in the correct location for ...