Ключевые слова: abstract, analysis, background, beat, cardiac, cardio, cardiogram, cardiograph, cardiology, care, chart, clinic, curve, diagnosis, ecg, ekg, electrocardiogram, emergency, frequency, graph, graphic, health, healthy, heart, heartbeat, hospital, icon, illustration, isolated, life, line, love, medical, medicine, monitor, monitoring, pressure, pulse, rate, red, rhythm, sign, stress, symbol, technology, test, wave, white,