Ключевые слова: analysis, analyze, arrest, attack, backdrop, background, beat, black, body, cardiac, cardio, cardiogram, cardiology, care, chart, closeup, concept, cubes, diagnosis, disease, electrocardiogram, electrocardiograph, frequency, graph, graphic, health, healthy, hospital, insurance, life, make well, medical, medicine, nobody, paper, pattern, people, printout, pulse, rhythm, science, technology, test, text, trace, unfocused, white, wooden, word,