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. 2016:2016:4750643.
doi: 10.1155/2016/4750643. Epub 2016 Jul 26.

Cardiopulmonary Resuscitation Pattern Evaluation Based on Ensemble Empirical Mode Decomposition Filter via Nonlinear Approaches

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Cardiopulmonary Resuscitation Pattern Evaluation Based on Ensemble Empirical Mode Decomposition Filter via Nonlinear Approaches

Muammar Sadrawi et al. Biomed Res Int. 2016.

Abstract

Good quality cardiopulmonary resuscitation (CPR) is the mainstay of treatment for managing patients with out-of-hospital cardiac arrest (OHCA). Assessment of the quality of the CPR delivered is now possible through the electrocardiography (ECG) signal that can be collected by an automated external defibrillator (AED). This study evaluates a nonlinear approximation of the CPR given to the asystole patients. The raw ECG signal is filtered using ensemble empirical mode decomposition (EEMD), and the CPR-related intrinsic mode functions (IMF) are chosen to be evaluated. In addition, sample entropy (SE), complexity index (CI), and detrended fluctuation algorithm (DFA) are collated and statistical analysis is performed using ANOVA. The primary outcome measure assessed is the patient survival rate after two hours. CPR pattern of 951 asystole patients was analyzed for quality of CPR delivered. There was no significant difference observed in the CPR-related IMFs peak-to-peak interval analysis for patients who are younger or older than 60 years of age, similarly to the amplitude difference evaluation for SE and DFA. However, there is a difference noted for the CI (p < 0.05). The results show that patients group younger than 60 years have higher survival rate with high complexity of the CPR-IMFs amplitude differences.

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Figures

Figure 1
Figure 1
The flowchart of the CPR evaluation. Note. The original 1001 ECG signals have to be reduced due to the quality of the data.
Figure 2
Figure 2
EEMD-extracted CPR and the time-frequency information of IMF 2.
Figure 3
Figure 3
EEMD-extracted CPR and the time-frequency information of IMF 3.
Figure 4
Figure 4
EEMD-extracted CPR and the time-frequency information of IMF 4.
Figure 5
Figure 5
Raw signal from AED machine. (a) Time-frequency result; (b) the raw signal.
Figure 6
Figure 6
EEMD-reconstructed CPR signal. (a) Time-frequency result; (b) the reconstructed signal.
Figure 7
Figure 7
CPR IMFs maxima information evaluation.

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