Ключевые слова: analysis, background, beat, cardiac, cardio, cardiogram, cardiology, care, chart, check, checkup, clinic, close, closeup, concept, curve, data, diagnosis, diagram, ecg, ekg, electrical, electrocardiogram, electrocardiography, examination, frequency, graph, health, healthy, heart, heartbeat, hospital, life, line, medical, monitor, paper, patient, pattern, print, pulse, rate, report, research, result, rhythm, test, up, wave, waveform,