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Cross sections of the heart
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1. Is the heart sectioned from apex to base? Or base to apex?
2. Is the initial view in the video anterior or posterior?
3. Identify the left ventricle and right ventricle in each cross section. How can you tell?
4. Identify the epicardial surface.
5. Identify cut surface of the myocardium.
6. Identify the endocardial surface. (Note: Distinguishing the cut surface and the endocardial surface is tricky in this case with decomposition.)
7. Identify any trabeculae carneae. (Note: Seeing trabeculae carneae tells you you’re looking at the endocardial surface.)
8. Identify any papillary muscles.
9. Focus on the left ventricle. Identify the posterior left ventricle, lateral left ventricle, anterior left ventricle and septum.
10. Should each part of the left ventricular wall have the same or different thickness?
11. Does any area show a different thickness and/or color from the rest?
12. If so, what does this change mean?
13. There is a myocardial infarction. In which region is the myocardial infarction?
14. Is the infarct old or new? How can you tell?
15. What is the typical appearance of an old myocardial infarction vs. a recent myocardial infarction?
16. Can a myocardial infarction cause the wall of the heart muscle to become thin? Why does this happen? How thin can the wall get?
17. What can be a clinical consequence of myocardial thinning?
18. What might an EKG have looked like for a patient with an infarct in this location?
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