An autopsy is performed on a 48 year old man who died suddenly. He had recently complained of feelings of generalized fatigue and moderate shortness of breath. Previously performed physical examinations showed an elevated JVP and positive Kussmaul sign but no further work up was performed. Post mortem microscopic examination of tissues of heart shows perivascular deposits of red extracellular material within the atria. When tissue is stained with congo red, the deposits show a birght green heu when viewed with polarized light. 1. What condition is this finding suggestive of? 2. How does this condition typically present? 3. What other additional findins are most likely present in this patient prior to his death and why?

The General Principles section of the USMLE covers these topics:
Biochemistry
Genetics
Microbiology
Pathology
Pharmacology