Ключевые слова: black, cardiac, cardiologist, cardiology, clean, closeup, device, diagnose, diagnosis, diagnostic, disease, emergency, equipment, exam, examination, health, healthcare, hear, heartbeat, hospital, instrument, isolated, listen, lung, measurement, medical, medicine, metal, object, physician, profession, professional, pulse, research, science, scientific, stethoscope, studio, test, tool, treatment,