Real-time atrial wall imaging during radiofrequency ablation in a porcine model

Genête, Mathieu; Winum, Pierre; Granier, M.; Liaud, Pierre; Cayla, Guillaume; Messner, P; Pasquié, Jean‐Luc; Schuster, Iris

doi:10.1016/j.hrthm.2015.04.012

Cited by 13 publications

(12 citation statements)

References 33 publications

(38 reference statements)

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“…In the preexperimental study, we confirmed that lesions were obscured when the sections were stained with hematoxylin and eosin. As described in the previous experiment, 18,19 lesions and nonablated tissue were identified by Masson's trichrome stain as blue and red portions, respectively. Hence, the sections were stained with Masson's trichrome.…”

Section: Pathological Lesion Assessmentmentioning

confidence: 99%

Comparison of dragging ablation and point‐by‐point ablation with a laser balloon on linear lesion formation

Nagase

Kobori

Inaba

et al. 2020

Cardiovasc electrophysiol

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Introduction Lesion size and continuity in dragging laser balloon (LB) ablation, which may enable fast and durable pulmonary vein isolation for atrial fibrillation, are unknown. We evaluated the differences in size and continuity of linear lesions formed by dragging ablation and conventional point‐by‐point ablation using an LB in vitro model. Methods and Results Chicken muscles were cauterized using the first‐generation LB in dragging and point‐by‐point fashion. Dragging ablation was manually performed with different dragging speeds (0.5–2°/s) using an overlap ratio of the beginning and last site during one application at 12 W/20 s and 8.5 W/30 s. Point‐by‐point ablation was performed with 25% and 50% overlap ratios at six energy settings (5.5 W/30 s to 12 W/20 s). Lesion depth, width, and continuity were compared. Lesion continuity was assessed by the surface and deep visible gap degree categorized from 1 (perfect) to 3 (poor). Twenty lesions were evaluated for each ablation protocol. Lesion depth and width in dragging ablation at high power (12 W) were comparable with most measurements in point‐by‐point ablation. Lesion depth and width were smaller at faster‐dragging speed and lower power (8.5 W) in dragging ablation. The surface visible gap degree was better in dragging ablation at all dragging speeds than a 25% overlapped point‐by‐point ablation (p < .001). Conclusion Dragging LB ablation at high power provides deep and continuous linear lesion formation comparable with that of point‐by‐point LB ablation. However, lesion depth and width depending on the dragging speed and power.

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Section: Pathological Lesion Assessmentmentioning

confidence: 99%

Comparison of dragging ablation and point‐by‐point ablation with a laser balloon on linear lesion formation

Nagase

Kobori

Inaba

et al. 2020

Cardiovasc electrophysiol

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“…Development of non-invasive real-time monitoring methods is hence essential for optimizing outcomes of these treatments. To this end, several imaging modalities have been suggested for this purpose [7][8][9][10][11]. However, these are either limited by lack of contrast and sensitivity, the use of ionizing radiation, shallow penetration or insufficient spatio-temporal resolution [8,12].…”

Section: Radiofrequency (Rf) Catheter Ablation Is Widely Employed Formentioning

confidence: 99%

Endocardial irrigated catheter for volumetric optoacoustic mapping of radio-frequency ablation lesion progression

et al. 2019

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“…Other imaging modalities that were explored for ablation lesion monitoring are conventional ultrasound [12][13][14][15] as well as ultrasound elastography [16][17][18]. Visibility of lesions on grayscale ultrasound has been disputed in literature, with contradictory reports of both decrease and increase in echogenicity in lesion areas.…”

Section: Rf Ablation Lesion Imaging In the Literaturementioning

confidence: 99%

Spectroscopic photoacoustic imaging of radiofrequency ablation in the left atrium

Iskander-Rizk¹,

Kruizinga²,

Steen³

et al. 2018

Biomed. Opt. Express

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Catheter-based radiofrequency ablation for atrial fibrillation has long-term success in 60-70% of cases. A better assessment of lesion quality, depth, and continuity could improve the procedure's outcome. We investigate here photoacoustic contrast between ablated and healthy atrial-wall tissue in vitro in wavelengths spanning from 410 nm to 1000 nm. We studied single-and multi-wavelength imaging of ablation lesions and we demonstrate that a two-wavelength technique yields precise detection of lesions, achieving a diagnostic accuracy of 97%. We compare this with a best single-wavelength (640 nm) analysis that correctly identifies 82% of lesions. We discuss the origin of relevant spectroscopic features and perspectives for translation to clinical imaging.

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Real-time atrial wall imaging during radiofrequency ablation in a porcine model

Cited by 13 publications

References 33 publications

Comparison of dragging ablation and point‐by‐point ablation with a laser balloon on linear lesion formation

Comparison of dragging ablation and point‐by‐point ablation with a laser balloon on linear lesion formation

Endocardial irrigated catheter for volumetric optoacoustic mapping of radio-frequency ablation lesion progression

Spectroscopic photoacoustic imaging of radiofrequency ablation in the left atrium

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