A 42-year-old patient complains of severe burning pains behind the sternum, which occurred approx an hour ago, after physical overload, cold sweat, sharp general weakness. Objectively observed: the skin is clean, pale in color. Pulse- 72/min, blood pressure 190/100 mm Hg. The boundaries of the heart have not changed. Tones are weakened, clean. The ECG determines: sinus rhythm, correct. The amplitude of the Q wave in leads II, III, avF is equal to the amplitude of the R wave, duration 0.04 seconds. ST segment elevation 4 mm higher was registered in the same leads isolines Specify. the previous diagnosis.