Many people make these 3 fatal mistakes: a 50-year-old man died of a heart attack in 12 hours

A 50-year-old man who did not suffer from heart disease, and in general he considered himself a healthy person, well, except that his back hurt due to hard physical work, suddenly feeling great pain in the chest. The man did not hesitate to call an ambulance. But the doctors, after doing an ECG, did not see any changes; the pain was attributed to an attack of osteochondrosis and was relieved by medication.