Ключевые слова: analysis, background, beat, cardiac, cardio, cardiogram, cardiology, care, chart, clinic, concept, curve, data, diagnose, diagnosis, diagnostic, disease, doctor, ecg, ekg, electrocardiogram, equipment, examination, frequency, graph, graphic, health, healthcare, healthy, heart, heartbeat, hospital, illness, life, love, medical, medicine, monitoring, normal, paper, protection, pulse, rate, red, research, rhythm, science, test, treatment,