When the pumping function of the heart is impaired, accompanied by an ejection fraction EF less than 40%, it is called systolic heart failure. Heart failure examination and treatment of systolic heart failure require strict adherence to the doctor's instructions to limit dangerous complications.

Myocardial infarction is one of the most commonly encountered serious cardiovascular emergencies in clinical practice. Cardiovascular disease is one of the leading causes of death in the group of cardiovascular diseases. Up to 30% of heart attacks die suddenly before hospitalization.