Geometrical constraint of sources in noninvasive localization of premature ventricular contractions

Svehlikova, Jana; Teplan, Michal; Tyšler, Milan

doi:10.1016/j.jelectrocard.2018.02.013

Cited by 22 publications

(24 citation statements)

References 13 publications

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“…A single dipole used as an equivalent electrical generator for the inverse solution can be considered as a geometrical constraint of the inverse problem, which is in general ill-posed [1]. The proposed RS parameter serves as an additional localization constraint.…”

Section: Discussionmentioning

confidence: 99%

“…First, the inverse solution using a single dipole as the equivalent generator was computed by the previously described methodology [1]. Possible positions of the inverse result were predefined inside the model of myocardial volume in 2 mm grid.…”

Section: Methodsmentioning

confidence: 99%

“…A simplified method of electrocardiographic imaging (ECGI) is the inverse solution using a single dipole that was introduced for finding an origin of the undesired heart electrical activity which is localized in a small area of the myocardium [1]. In general, ECGI aims to reconstruct the heart electrical activity on the whole surface of ventricles during the heartbeat.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous works [1], localization of the dipole best representing the input BSP map was derived according to the criterion of the minimal relative residual error between the input BSP map and the BSP map computed from the dipole estimated by the inverse solution. In this study, we introduce an additional criterion to complement the residual error, so that the localization of the undesired ventricular contraction is performed in the multiobjective optimization setting.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiobjective Optimization Approach to Localization of Ectopic Beats by Single Dipole: Case Study

Svehlikova¹,

Zelinka²,

Tyšler³

et al. 2019

2019 Computing in Cardiology Conference (CinC)

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A novel reliability parameter was suggested for the inverse solution using a single dipole for localization of the origin of an undesired ventricular activity from clinical data. Body surface potential maps (BSPMs) were measured for several minutes on the patient with premature ventricular contractions and implanted cardiostimulator. The measured signal was segmented into ECG beats that were further clustered according to their morphology. Assuming a normal distribution of the signals within the cluster a parameter "reliability score" (RS) evaluating the distribution of the inversely computed dipole moments was suggested. Then the optimal inverse solution (dipole) was estimated in the multi-objective optimization setting through simultaneous optimization of both the relative residual error (RRE) between the input BSPM and the map computed by the inverse dipole and the RS parameter. The method was applied on BSPMs measured for 5 minutes of imposed pacing (498 beats). The inclusion of the reliability score lead to improvement of the localization error from 16 mm (RRE only) to 11 mm (RRE+RS) and from 13 to 9 mm for a homogeneous and inhomogeneous torso, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiobjective Optimization Approach to Localization of Ectopic Beats by Single Dipole: Case Study

Svehlikova¹,

Zelinka²,

Tyšler³

et al. 2019

2019 Computing in Cardiology Conference (CinC)

Self Cite

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show abstract

“…Some of them use complex models describing the ventricular activation in the whole volume such as transmembrane voltages, epicardial potentials or equivalent double layer [4], [5]. However, a starting point of ventricular electrical activity can be localized also using a model of a single point electrical generator as it was shown on simulated data in [6]. The inverse methods in electrocardiography solve the ill-posed problems, thus they can be sensitive to changes in the input data.…”

Section: Introductionmentioning

confidence: 99%

Impact of Signal Preprocessing on the Inverse Localization of the Origin of Ventricular Pacing

Svehlikova¹,

Zelinka²,

Doğrusöz³

et al. 2018

2018 Computing in Cardiology Conference (CinC)

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The ECG signal measured in clinical or experimental conditions is usually contaminated by noise, which should be eliminated by proper signal processing methods. The selection of the method can be crucial for the results obtained from measured signal.Seven methods of high frequency noise removal and four methods of baseline drift removal were applied on experimental ECG signals measured during 30 s of induced ventricular pacing. Then for all possible combinations of the signal pre-processing methods an averaged signal representing one heart beat was computed. The origin of ventricular activity was assessed by the inverse solution using a single dipole. The impact of pre-processing on the quality of the inverse solution was observed.The localization error between the known position of the stimulating electrode and the computed origin of ventricular activation was more than 5 cm if the baseline of the processed signal did not coincide with the zero line. However, if the processed signal started from the zero value, an acceptable localization error from 0.7 to1.3 cm was obtained.The inverse assessment of the origin of ventricular tachycardia using a single dipole is very sensitive to proper baseline drift removal. Because the inverse solution was computed for averaged signal, various methods of high frequency noise removal did not affect the results.

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Accuracy of cardiac ablation catheter guidance by means of a single equivalent moving dipole inverse algorithm to identify sites of origin of cardiac electrical activation

Lee

Arai

et al. 2019

J Interv Card Electrophysiol

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Accuracy of cardiac ablation catheter guidance by means of a single equivalent moving dipole inverse algorithm to identify sites of origin of cardiac electrical activation The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Lv, Wener et al. "Accuracy of cardiac ablation catheter guidance by means of a single equivalent moving dipole inverse algorithm to identify sites of origin of cardiac electrical activation."

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Geometrical constraint of sources in noninvasive localization of premature ventricular contractions

Cited by 22 publications

References 13 publications

Multiobjective Optimization Approach to Localization of Ectopic Beats by Single Dipole: Case Study

Multiobjective Optimization Approach to Localization of Ectopic Beats by Single Dipole: Case Study

Impact of Signal Preprocessing on the Inverse Localization of the Origin of Ventricular Pacing

Accuracy of cardiac ablation catheter guidance by means of a single equivalent moving dipole inverse algorithm to identify sites of origin of cardiac electrical activation

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