Dicrotic Notch Detection and Analysis of Arterial Pulse by using Discrete Wavelet Transform
Arterial pulse wave shows physical characteristics of heart, mean reports of a pulse and pressure changes when blood spouted from heart. The Dicrotic notch (fall on the downward slope) indicates the cessation of systole and represents closure of the aortic valve and subsequent retrograde flow. The location of the Dicrotic notch varies according to the timing of aortic closure in the cardiac cycle. Dicrotic notch plays a significant role in diagnosing sclerosis, occlusion, stenosis, arterial spasm and erythromelalgia. Hence we have used Discrete Wavelet transform to Detect and analyze the Dicrotic notch in arterial pulse wave form. The arterial pulse data is recorded using a data acquisition system (PHYSIOPACK) which comprises of multi channel recording equipment with sensors and a PC to store the data for further analysis. The homogeneous age group of 15 subjects was tested using two different wavelet transforms namely Haar and Daubuchies4 (db4). The peripheral pulse has a steep rise and a notch on falling slope in the younger subjects, with older subjects a more gradual rise and fall and no pronounced dicrotic notch were observed. The results obtained are compared between the two methods and found that the Haar wavelet approximately matches with the ideal results.
Discrete Wavelet Transform (DWT) Dicrotic Notch and Differentiation
Thirupathanna.Kurva Dabbu.Suman M.Venkateswara Rao
Government Institute of Electronics East mareddpally, Secunderabad India Department of Biomedical Engineering University College of Engineering Osmania University, Hyderabad
国际会议
成都
英文
219-223
2011-01-14（万方平台首次上网日期，不代表论文的发表时间）