What is diagnosis of fresh myocardial infarction in ECG: (A) QT interval prolongation, (B) P mitrale, (C) ST segment elevation, (D) ST segment depression
Answer is C. 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).