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Feasibility of Transatrial Access for Epicardial Ablation: Evaluation of 2 Different Techniques in Swine. | LitMetric

AI Article Synopsis

Article Abstract

Background: The subxiphoid pericardial access is technically difficult and has a considerable rate of complications, thus transatrial access may be an alternative.

Objectives: This study sought to assess the feasibility and safety of this strategy regarding periprocedural period and after 1-week follow-up.

Methods: The investigators performed epicardial mapping through transatrial puncture in 20 swine. Animals were divided into group A, in which aspiration of the sheath was performed to maintain negative pressure after the withdraw of the catheters, and group B, in which a device (Konar-MF VSD Occluder) was delivered to occlude the right atrial appendage perforation. Bleeding was investigated immediately and 1 week after.

Results: Access was safe in 19 of 20 animals (95%) with small amount of bleeding (6.4 ± 6 mL). In group A (n = 10), 1 animal presented hemopericardium right after the puncture. In the other 9, epicardial ablation was performed and 60.0 ± 28.0 mL of blood was aspirated without events. After 1 week, fibrin-hemorrhagic pericarditis was identified in 3 animals. In group B (n = 10), reaching the epicardial surface was possible in all animals. An adequate position of the prosthesis was obtained in 90% (9 of 10). One death occurred in the immediate postoperative period, secondary to pneumothorax. After 1 week, postmortem analysis showed absence of pericardial bleeding and a normal-appearing pericardium in the 8 animals with adequate prosthesis position.

Conclusions: Transatrial access allows epicardial mapping and ablation. Sheath removal after negative pressure contributes to achieving acute bleeding control but does not prevent its occurrence. The use of the device prevents bleeding and hemorrhagic pericarditis.

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Source
http://dx.doi.org/10.1016/j.jacep.2023.07.015DOI Listing

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