Ключевые слова: background, book, books, cardiology, diagnosis, diagnostic, disease, doctor, education, emergency, equipment, examination, expertise, health, healthcare, heart, heartbeat, hospital, information, instrument, isolated, knowledge, learning, library, literature, medical, medicine, old, paper, profession, professional, reading, research, retro, science, scientific, stethoscope, study, studying, test, tool, training, treatment, white, wisdom,