Study on Homecare Single Lead Electrocardiogram for Detecting Heart Rate Variability and Revolving Heart Beat Process

• Main Authors: Yun-Chiao Tung, 董雲樵
• Other Authors: San-Jan Ruan
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/36287870749695006124

碩士 === 國立臺灣科技大學 === 電子工程系 === 103 === The temporal composite waveform signal of single-lead electrocardiogram (ECG) comprising QRS waveform complex can be may be seen as enriched cardiac operation information including overall heartbeat true-time related heart-rate variability and temporal analysis towards standards of routine practice. This study applied empirical mode decomposition (EMD) of non-linear decomposition algorithm established by Dr. Norden Huang, Academician of the Academia Sinica, in order for implementing non-linear decomposition on temporal waveform data of non-invasive ECG towards detailed temporal cardiac actions within individual heartbeats. Preliminary ECG decomposition retrieved temporal cardiac actions within individual heartbeats pertaining to the neurocardial conductance (Ncc) and/or myocardial contraction (Mcc). The ECG decomposition adopted continuous R-trio R0-R1-R2 as of jointed R-R interval duo (RRi2) and as well R1 true-time (mSec) value as of heartbeat origin point for RRi2 zero calibration of true-time action intervals in order for plotting waveform data from continuous heartbeats. Respective RRi2 waveforms of the four Ncc actions as of AV-His-LBBseptal-RBB revealed preliminary regularity. Consequently, ECG decomposition adopted continuous R0-R1-R2 true-time interval RRi2 as of 200% normalized true-time intervals (RRi2%) and as well R1 normalized (RRi2%) value as of heartbeat unit scale for RRi2% 100% calibration of true-time action intervals in order for plotting waveform data from continuous heartbeats. Respective RRi2% waveforms of the four Ncc actions AV-His-LBBseptal-RBB revealed increased regularity in which His and LBBseptal showed rather narrow variation range. Continuously, ECG decomposition retrieved the normalized and aligned RRi2% values of 20 heartbeat actions based on highest statistical possibility in order for comparing the reference template RRi2% values of 12 heartbeat actions. The yield of 5.81% minimal difference among all 12 heartbeat actions was at 749x2 mSec of referral RRi2 value in which AV-His-xxx-RBB showed only 0.75% difference.