Ключевые слова: analysis, analyze, background, beat, blue, cardiac, cardiology, care, check, clinic, closeup, device, diagnosis, diagnostic, disease, doctor, emergency, equipment, exam, examination, health, health care, heart, heartbeat, help, hospital, illness, instrument, isolated, listening, measurement, medical, medical equipment, medicine, metal, nobody, object, pulse, research, rubber, stethoscope, test, tool, treatment, view, white,