s. X, age 55 years, has been complaining of severe fatigue and "indigestion" on and off, but it seems to be getting worse over the past several hours. Her son is quite concerned and decides to take her to the emergency department. On arrival, she appears very anxious, and her facial skin is cool and clammy; her blood pressure is 90/60, and the pulse is around 90, weak and irregular. She is given oxygen, an intravenous line is opened, and leads for ECG are attached. Blood is taken for determination of serum enzymes and electrolytes. Tentative diagnosis is myocardial infarction involving the left ventricle. Her son provides information that indicates Ms. X is a long-time smoker, has a stressful job as a high school teacher, is recently separated after 20 years of marriage, and is fearful of losing the family home. She has also seemed to be more fatigued, and stopped going to the gym about 18 months ago. She has begun to rely on "fast foods" like pizza and fried chicken and cooks infrequently. Her father died of a heart attack at age 50. She has also noticed more fatigue and intermittent leg pain when walking or climbing stairs at work. Generalized atherosclerosis is suspected. What do you suspect Ms. X was experiencing when she reported "indigestion"? Was this true indigestion or related to her cardiac condition? Explain the pathophysiology behind this pain Think about the normal or typical presenting signs of myocardial Infarction. What is atypical in Ms. X's symptoms? How does this affect treatment and prognosis? What serum enzyme and electrolyte levels do you anticipate being checked in the ED. How are these levels related to the changes happening in Ms. X's cardiovascular system?