Ключевые слова: ampoules, analysis, background, cardiac, cardiology, care, chart, check, concept, coronavirus, covid19, data, diagnosis, diagram, doctor, ecg, electrical, electrocardiogram, electrocardiograph, equipment, examination, graph, health, heart, heartbeat, hospital, illness, injections, instrument, life, line, masks, medical, medicine, paper, patient, pills, professional, pulse, record, research, science, snapshot, stethoscope,