Ключевые слова: abstract, american, analytics, attack, background, beat, beautiful, biotechnology, cardio, cardiogram, cardiology, color, communication, consulting, culture, double, drawing, ecg, electrocardiogram, element, examination, exposure, flag, flagstaff, graph, heart, heartbeat, human, icon, image, innovation, internet, medicine, national, online, poly, pulse, rate, shape, signal, states, sunset, surgery, symbol, technology, united, us, usa, web, wind,