Ключевые слова: abstract, background, beat, business, cardiac, cardio, cardiogram, cardiology, care, char, clinic, concept, curve, design, diagnosis, disease, doctor, ecg, ekg, electrocardiogram, emergency, frequency, graph, graphic, health, healthy, heart, heartbeat, hearth, hospital, icon, illustration, isolated, life, line, love, medical, medicine, modern, monitor, pulse, rate, rhythm, shape, sign, symbol, technology, test, wave,