CHAPTER 6: ANATOMICAL VARIANTS AND ULTRASOUND ARTIFACTS
Select the one best answer for each question.
1. Identify the structure:
a. Chiari network. This is a sinus venosus–derived structure that is characterized by a fenestrated, undulating appearance.
2. Identify the artifact:
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.
3. Identify the structure at the arrow:
c. Mitral annular calcification
d. Lipomatous hypertrophy of the interatrial septum
b. This is a myxoma. The patient also has lipomatous hypertrophy of the interatrial septum, but the arrow is pointing to the myxoma.
4. Identify the variant or pathology:
c. Lipomatous hypertrophy of the interatrial septum
a. This is an atrial septal defect, not a normal anatomical variant.
5. What is the artifact seen?
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.
6. Identify the structure at the arrow:
d. Left ventricular thrombus
d. This is a left ventricular (LV) thrombus. It is not in the correct location for ...