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analysis, attack, background, beats, blood, body, cardiogram, cardiology, cardiovascular, care, concept, curve, diagnosis, disease, electrical, energy, fitness, frequency, graph, health, healthy, heart, heartbeat, hospital, human, icon, illustration, life, line, love, medical, medicine, monitor, organ, patient, pulse, radio, rate, shape, sign, signal, symbol, system, wave, waveform, wellness,