3D Mapping for PVI- Geometry, Image Integration and Incorporation of Contact Force Into Work Flow

Borlich, Martin; Iden, Leon; Kuhnhardt, Krister; Paetsch, Ingo; Hindricks, Gerhard; Sommer, Philipp

doi:10.4022/jafib.1795

Cited by 15 publications

(2 citation statements)

References 24 publications

(22 reference statements)

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“…Electroanatomical mapping systems (EMS) allow for the identification of low‐voltage areas (LVA) that may constitute a substrate for arrhythmias 1–3 . Voltage maps are created on the basis of collected points, in which the amplitude of the electrogram in unipolar and bipolar configuration is recorded 3,4 . In a number of studies, cut‐off values were determined to differentiate healthy myocardium from diseased tissue, where LVA are considered regions of fibrosis 2,3,5 .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Voltage maps are created on the basis of collected points, in which the amplitude of the electrogram in unipolar and bipolar configuration is recorded. 3,4 In a number of studies, cut-off values were determined to differentiate healthy myocardium from diseased tissue, where LVA are considered regions of fibrosis. 2,3,5 However, none of them have investigated the variability of locally recorded potentials in clinical settings.…”

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confidence: 99%

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Atrial electrogram amplitude variability during atrial fibrillation ablation

Hangiel

Kuśnierz²,

Bardyszewski³

et al. 2022

Cardiovasc electrophysiol

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Introduction Variability of the bipolar atrial electrogram amplitude may affect voltage maps created during ablation procedures, and thus also the extent of ablations. Therefore, the aim of the study was to assess the beat‐to‐beat electrogram amplitude variability in the left atrium in patients undergoing atrial fibrillation ablation. Methods In 11 patients undergoing ablation for atrial fibrillation, 362 mapping points were collected in two series. At each point, three consecutive beats were recorded and verified including the bipolar electrogram amplitude, contact force (CF), and orientation of the catheter tip. The repeatability and reproducibility of obtained measurements between consecutive beats and series were assessed by the Pearson correlation coefficient (r), the Bland‐Altman test, repeatability coefficient (RC), relative standard deviation (RSD), and concordance correlation coefficient (CCC). Results A total of 1086 beats were analyzed. The correlation coefficient for bipolar atrial electrogram amplitude for the first two beats, and for the first and the third beats were 0.94 and 0.86, respectively. The average of differences between the first two beats and between the first and the third beats were 0.06 and 0.13 mV with 95% limits of agreement (LoA) within ±0.98 and ±1.74 mV, respectively. For CF values ≤5 and ≥20 g, the 95% LoA were narrower compared to other CF ranges and were ±0.49 and ±0.71 mV from the average value, respectively. When the analyzes were performed within the predefined ranges of bipolar electrogram amplitude: 0.05–1; 1–2; 2–3 mV, the 95% LoA were within ±0.33, ±0.98, and ±0.84 mV from the average value, respectively. RC and RSD were 1.41 mV and 20.8%, respectively. For repeated measurement between series, CCC ranged from 0.67 to 0.71 and the 95% LoA were within ±2.7 to 2.9 mV from the average value. Conclusion Bipolar atrial electrogram amplitude recorded at a given site during ablation procedures is variable to an extent that may be clinically relevant. The magnitude of the observed variability is greater during remapping.

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Section: Introductionmentioning

confidence: 99%