Per the instructions for use (ifu), permanent or transient neurological events including stroke are potential adverse events associated with the tavr procedure and the use of the edwards thv devices. according to literature review, and as documented in a clinical technical summary written by edwards lifesciences, stroke is recognized in the literature as a well-known complication in a small number of patients undergoing tavr.Risk factors correlating with a number of patient co-morbidities have been identified.Although in many cases the root cause of the event is unable to be determined, strokes during tavr are undoubtedly multifactorial, the dominant etiology likely being intra-procedure embolic events.A transcranial doppler study during tavr demonstrated that the majority of procedural embolic events occurred during balloon valvuloplasty, manipulation of catheters across the aortic valve, and valve implantation.An analysis in patients undergoing valve surgery revealed four baseline characteristics and two procedural events that were associated with early post-procedure stroke: female sex, ef < 30%, diabetes, age older than 70 years, bypass procedure time> 120 min, and calcification of the ascending aorta.Predictors of late stroke have included female sex, age older than 75 years, atrial fibrillation, and a history of or current smoking.There were no important differences in the frequency of late strokes between tavr and avr patients. after tavr, there appears to be a more significant proportion of early strokes occurring < 24 h post-procedure, but tavr patients with multiple co morbidities are probably at higher risk of both early and late strokes.In this case, there was no allegation or indication a device malfunction contributed to this adverse event. the cause of the stroke cannot be determined, however, it is possible that patient factors (hypercholesterolemia) and/or the mechanisms of the tavr procedure described above may have caused or contributed to the event.The ifu and training manuals have been reviewed and no inadequacies have been identified with regards to warnings, contraindications, and the directions/conditions for the successful use of the device.Complaint histories for all reported events are reviewed against trending control limits on a monthly basis, and any excursions above the control limits are assessed and documented as part of this monthly review.No corrective or preventative actions are required.
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As presented during the euro pcr 2019 conference: "tavi complication: case report", few hours after the implant of a 23mm sapien 3 valve in the aortic position, the patient developed right sided upper and lower extremity weakness with dysarthria and facial weakness.An angiography showed a filling defect at the middle aspect of the m1 segment of the left middle cerebral artery (mca) with a "dense mca" sign in favor of a left mca stroke. thrombectomy was directly performed and a large clot was seen in the left m1 segment.The patient fully recovered with no residual neurologic deficit. as per medical opinion, tavi in patient with hypercholesterolemia is probably at higher risk of thrombo-embolic event.
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