[Expert Solution]: A 57-year-old African-American woman is…

A 57-year-old African-American woman is seen at an urgent care clinic for a headache not relieved by acetaminophen or ibuprofen. Physical examination reveals an overweight woman who is short of breath from the walk to the examination room. Her fingers are puffy with tight rings that she is unable to remove. The woman reports she has a history of cigarette smoking, primary hypertension, high cholesterol, and type 2 diabetes. From these risk factors and the initial impression, the staff fears some form of heart disease, and the woman is transported to a nearby emergency department for further evaluation. While in the emergency department, the woman begins to complain of indigestion. The emergency department staff knows that this sensation may be angina pectoris, which is caused by: An increase in nitrates Valvular stenosis Autonomic nervous system dysfunction The buildup of lactic acid