<prompt> What is diagnosis of fresh myocardial infarction in ECGQT interval prolongationP mitraleST segment elevationST segment depression  <response>: elevation and T-wave inversion with pathological Q-waves are typically seen in leads adjacent to the infarcted segment of myocardium. Reciprocal ST depression or T-wave inversion in opposite leads. A non-Q-wave infarct may occur and has a high risk of mortality as they are prone to develop dangerous arrhythmias and recurrent angina. 