Spatiotemporal representation of cardiac vectorcardiogram (VCG) signals

Background Vectorcardiogram (VCG) signals monitor both spatial and temporal cardiac electrical activities along three orthogonal planes of the body. However, the absence of spatiotemporal resolution in conventional VCG representations is a major impediment for medical interpretation and clinical usa...

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Vydané v:Biomedical engineering online Ročník 11; číslo 1; s. 16
Hlavní autori: Yang, Hui, Bukkapatnam, Satish TS, Komanduri, Ranga
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: London BioMed Central 30.03.2012
BioMed Central Ltd
Springer Nature B.V
BMC
Predmet:
Biomaterials
Biomedical Engineering and Bioengineering
Biomedical Engineering/Biotechnology
Biotechnology
Cardiac arrhythmia
Cardiovascular diseases
Cellular signal transduction
Color
Color-coding scheme
Computer Graphics
Dynamics
Electrocardiogram
Electrocardiogram (ECG)
Electrocardiography
Engineering
Health sciences
Heart - physiology
Humans
Physiological aspects
Signal Processing, Computer-Assisted
Software
Spatio-Temporal Analysis
Spatiotemporal representation
Studies
Vectorcardiogram (VCG)
Vectorcardiography
Spatiotemporal representation
Electrocardiogram (ECG)
Color-coding scheme
Vectorcardiogram (VCG)
ISSN:1475-925X, 1475-925X
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Shrnutí:Background Vectorcardiogram (VCG) signals monitor both spatial and temporal cardiac electrical activities along three orthogonal planes of the body. However, the absence of spatiotemporal resolution in conventional VCG representations is a major impediment for medical interpretation and clinical usage of VCG. This is especially so because time-domain features of 12-lead ECG, instead of both s patial and temporal characteristics of VCG, are widely used for the automatic assessment of cardiac pathological patterns. Materials and methods We present a novel representation approach that captures critical spatiotemporal heart dynamics by displaying the real time motion of VCG cardiac vectors in a 3D space. Such a dynamic display can also be realized with only one lead ECG signal (e.g., ambulatory ECG) through an alternative lag-reconstructed ECG representation from nonlinear dynamics principles. Furthermore, the trajectories are color coded with additional dynamical properties of space-time VCG signals, e.g., the curvature, speed, octant and phase angles to enhance the information visibility. Results In this investigation, spatiotemporal VCG signal representation is used to characterize various spatiotemporal pathological patterns for healthy control (HC), myocardial infarction (MI), atrial fibrillation (AF) and bundle branch block (BBB). The proposed color coding scheme revealed that the spatial locations of the peak of T waves are in the Octant 6 for the majority (i.e., 74 out of 80) of healthy recordings in the PhysioNet PTB database. In contrast, the peak of T waves from 31.79% (117/368) of MI subjects are found to remain in Octant 6 and the rest (68.21%) spread over all other octants. The spatiotemporal VCG signal representation is shown to capture the same important heart characteristics as the 12-lead ECG plots and more. Conclusions Spatiotemporal VCG signal representation is shown to facilitate the characterization of space-time cardiac pathological patterns and enhance the automatic assessment of cardiovascular diseases.
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ISSN:1475-925X
1475-925X
DOI:10.1186/1475-925X-11-16