Ключевые слова: amplitude, analyse, analysis, analyze, background, beat, cardiac, cardio, cardiogram, cardiograph, cardioid, cardiology, chart, curve, diagnose, diagnosis, diagram, ecg, ekg, electrocardiogram, electrocardiograph, electrocardiography, frequency, graph, graphic, health, healthcare, healthy, heart, heartbeat, medical, medicine, mesh, oscillate, paper, pattern, pressure, pulsating, pulse, pulse trace, research, rhythm, stress, tachycardia,