Ключевые слова: analysis, background, beat, black, blackboard, blood, cardiac, cardio, cardiogram, cardiograph, cardiology, chalk, chart, clinic, curve, design, diagnosis, doodle, drawing, ecg, emergency, frequency, graph, hand, handdrawing, health, healthcare, healthy, heart, heartbeat, hospital, illness, impulse, life, line, medical, medicine, monitor, monitoring, patient, pulse, rate, rhythm, sign, signal, symbol, test, texture, vitality, wave,