A 68-year-old obese woman (BMI=32 kg/m2) presents with substernal chest pain. Results of laboratory studies include an elevated WBC count (13,000/µL), CK-MB of 6.6 ng/mL, and troponin-I of 2.5 ng/mL. ECG confirms a myocardial infarction of the left ventricular wall. Which of the following mechanisms is most likely responsible for the myocardial infarction in this patient?

A 68-year-old obese woman (BMI=32 kg/m2) presents with substernal chest pain. Results of laboratory studies include an elevated WBC count (13,000/µL), CK-MB of 6.6 ng/mL, and troponin-I of 2.5 ng/mL. ECG confirms a myocardial infarction of the left ventricular wall. Which of the following mechanisms is most likely responsible for the myocardial infarction in this patient?

A 62-year-old female with a history of hyperlipidemia and hypothyroidism. Her current medication includes cholestyramine and levothyroxine. What advice would you tell her to do to prevent drug-drug interactions between them?

A medical student is doing a summer research project that involves administering beta2-receptor agonists to rats to determine the physiologic changes. Which of the following would be expected following steady state intravenous dosing of agent X, a beta2 agonist?

During what phase does stroke volume decrease in the ventricles?

A 23-year-old woman develops the sudden onset of congestive heart failure. Her condition rapidly deteriorates and she dies in heart failure. At autopsy, patchy interstitial infiltrates composed mainly of lymphocytes are found, some of which surround individual myocytes. What is the most likely cause of this patient's heart failure?