Ключевые слова: beat, beating, cardiac, cardio, cardiograph, cardiology, care, clinic, closeup, concept, digital, doctor, electronic, element, emergency, energy, equipments, finger, frequency, hand, health, healthcare, healthy, heart, heartbeat, hospital, indicators, level, life, medical, medicine, oximeter, oxygen, patient, pressure, pulsation, pulse, rhythm, saturation, signal, sound, technology, test, wave, waveform,