Ключевые слова: arrhythmia, background, beat, cardiac, cardio, cardiogram, cardiograph, cardiologist, cardiology, care, chart, clinic, concept, diagnosis, diagnostic, disease, doctor, ecg, ekg, electrocardiogram, equipment, examination, graph, graphic, health, healthcare, healthy, heart, heartbeat, help, hospital, illness, instrument, insurance, life, medic, medical, medicine, paper, phonendoscope, pills, prevention, protection, pulse, research, sickness, stethoscope, table, tablets, test,