Ключевые слова: ache, adult, analysis, attack, background, beat, blood, blue, cardiac, cardio, cardiogram, cardiologist, cardiology, cardiovascular, care, chest, chronic, clinic, closeup, color, concept, cure, day, decorative, diagnosis, disease, doctor, donor, ecg, electrocardiogram, emergency, examination, frequency, graph, graphic, hand, hands, health, healthy, heart, heartbeat, holding, hospital, ill, illustration, infarct, life, line, male, man, medical, medicine, model, monitor, month, organ, person, physical, pressure, prevent, problem, protect, pulse, rate, red, rhythm, science, shape, sick, sign, small, stroke, symbol, symptom, technology, therapy, treatment, wave, young,