Ключевые слова: background, cardiac, cardiologist, cardiology, closeup, device, diagnose, diagnosis, diagnostic, disease, emergency, equipment, examination, health, healthcare, healthy, hear, heartbeat, hospital, instrument, isolated, listen, measurement, medical, medicine, metal, nurse, physician, profession, professional, pulse, research, science, scientific, sterile, stethescope, stethoscope, test, tool, treatment, white, work,