The possible clinical causes of high troponin in 2-month-old babies include myocardial ischemic injury and myocardial non-ischemic injury. 1. myocardial ischemic injury: the most common diseases in this situation are acute myocardial infarction, but this disease rarely occurs in newborns, usually may exist in the myocardial structure of the baby, the coronary artery has congenital stenosis, which may result in myocardial injury and troponin index elevation. 2. Non-ischemic injury of the myocardium: common clinical diseases include viral myocarditis, infective endocarditis, etc. Newborn babies are weak and inadvertently infected with viruses, bacteria and other pathogens, and the myocardial cells are infected and damaged, and the troponin in the myocardial cells is released into the bloodstream, which makes the relevant indexes rise. A high Troponin level is often indicative of myocardial damage in babies, and it is recommended to go to the hospital for examination and early treatment.