How have global databases had an impact on health research? A. Global databases allow doctors and researchers to share information so they can chart health trends and predict how illnesses will spread. B. Global databases are used within a health care facility to keep track of all patients at the facility, but they do not keep any data from other facilities. C. Global databases allow doctors and researchers located in the United States to share information and gain a greater understanding of disease processes. D. Global databases keep a record of global illnesses, but they do not provide any socioeconomic or demographic information for the people who have those illnesses

A62-year-old man is being treated for an acute myocardial infarction. he originally came to the ed with substernal chest pain and diaphoresis. given his risk factors of hypertension, diabetes, tobacco use, and family history, he is considered high risk. an ecg in the ed reveals a left-bundle branch pattern, and cardiac enzymes are elevated slightly. after a focused evaluation in the ed, the patient receives iv thrombolytics. although his bundle branch pattern never resolves, the patient is chest pain-free and haemodynamically stable after thrombolysis. two days later, however, the patient reports episodes of recurrent chest discomfort and shortness of breath overnight. in evaluating for potential myocardial reinfarction, which of the following is the most appropriate diagnostic test? - creatinine kinase- dynamic ecg changes- lactate dehydrogenase- myoglobin levels- troponin i level