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Edwards received notification of a transcatheter tricuspid valve replacement (ttvr) procedure involving the evoque system where upon deployment, patient went into complete heart block.The patient was paced off wire and a temp pacer was placed through the valve.Ep was consulted and they placed a temp pacer lead from the ij.The patient is currently pacer dependent and in stable condition.The conduction disturbance was noticed right at deployment.The final valve deployment position was good.Per medical opinion, the perceived root cause of the event was the valve interacting with the conduction system.
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The following sections were updated/corrected/added: b4, g3, g6, h2, h6, and h11.The complaint for valve interacts with conduction system was confirmed with other empirical evidence via information received by edwards.Based on the thorough investigation completed during the complaint reviews, no product issues have been identified.The investigations did not reveal any evidence of a manufacturing defect or device-related issue that could have contributed to the events.Per the instructions for use (ifu), conduction system disturbance and/or heart block which may require treatment (including permanent pacemaker) are potential adverse events.Heart block and other conduction disturbances are common in patients with underlying cardiovascular disease and can be exacerbated or aggravated with standard intra-operative medications or anesthesia.Such events are related to the patient's underlying condition.Other mechanisms for conduction abnormalities could be related to coronary obstruction due to air embolism, coronary spasm and/or local edema affecting the av node.Conduction disturbances have also been documented during transcatheter cardiac procedures as a result of direct interaction with cardiac anatomy, especially in patients with underlying conduction abnormalities.Other potential causes include trauma by a guidewire or delivery system.Additionally, cardiac conduction system complications are known risks with tricuspid valve interventions due to the proximity of the atrioventricular node (av node) to the septal leaflet of the tricuspid valve.These conduction disturbances can lead to post-operative heart block requiring pacemaker implantation.Nevertheless, a definitive root cause cannot be determined.Since there are no confirmed product or labeling/ifu/training material non-conformances affecting distributed product and no other triggers have been met, no corrective or preventative actions are required.
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