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• W4313478737 abstract "Sex-specific Long-term Outcomes of Watchman Left Atrial Appendage Closure for Stroke Prevention in Atrial FibrillationJournal of the Society for Cardiovascular Angiography & InterventionsVol. 2Issue 1100541PreviewA recent analysis of a large registry showed differences in periprocedural outcomes of the Watchman left atrial appendage closure device in males compared with females. The objective of our study was to investigate the 5-year event rate in males and females enrolled in the Watchman device premarket clinical studies submitted for US Food and Drug Administration review. Full-Text PDF Open Access “So many have contributed to my journey, it would be all too simple to deem my career a single effort. It is not. I am a product of a village.” Tina Thompson, 9-time WNBA All-Star and 4-time league champion Regulators at the US Food and Drug Administration (FDA) have increasingly sought collaboration with physicians, scientists, academia, industry, and, most notably, patients over the past 10 years. Furthermore, the formal guidance from the FDA communicates priorities as including assurance that they “provide consumers, patients, their caregivers, and providers with understandable and accessible science-based information about the products we oversee” and that the public they seek to protect is well-represented in populations studied in regulatory studies for medical devices. In this effort, they have been doggedly committed. In this issue of the JSCAI, we see a reflection of that commitment in a manuscript by Jiang et al,1Jiang H. Zheng Q. Cheng Y.J. et al.Sex-specific long-term outcomes of Watchman left atrial appendage closure for stroke prevention in atrial fibrillation.J Soc Cardiovasc Angiogr Interv. 2023; 2: 100541Google Scholar a group of FDA regulator-scientists, which addresses ongoing questions of comparative safety and effectiveness of left atrial appendage occlusion (LAAO) compared with those of warfarin anticoagulation. These questions linger among sex subgroups despite previous work using data from registries, claims, and clinical trials.2Osman M. Patel B. Munir M.B. et al.Sex-stratified analysis of the safety of percutaneous left atrial appendage occlusion.Catheter Cardiovasc Interv. 2021; 97: 885-892Crossref PubMed Scopus (20) Google Scholar, 3Alkhouli M. Russo A.M. Thaler D. et al.Sex differences in safety and effectiveness of LAAO: insights from the Amulet IDE trial.JACC Cardiovasc Interv. 2022; 15: 2143-2155Crossref PubMed Scopus (4) Google Scholar, 4Darden D. Duong T. Du C. et al.Sex differences in procedural outcomes among patients undergoing left atrial appendage occlusion: insights from the NCDR LAAO Registry.JAMA Cardiol. 2021; 6: 1275-1284Crossref PubMed Scopus (40) Google Scholar In particular, by combining patient-level data from 2 clinical trials5Reddy V.Y. Sievert H. Halperin J. et al.Committee PAS and InvestigatorsPercutaneous left atrial appendage closure vs warfarin for atrial fibrillation: a randomized clinical trial.JAMA. 2014; 312: 1988-1998Crossref PubMed Scopus (657) Google Scholar,6Holmes D.R. Reddy V.Y. Turi Z.G. et al.PROTECT AF InvestigatorsPercutaneous closure of the left atrial appendage versus warfarin therapy for prevention of stroke in patients with atrial fibrillation: a randomised non-inferiority trial.Lancet. 2009; 374: 534-542Abstract Full Text Full Text PDF PubMed Scopus (1709) Google Scholar and 2 continuing access protocols,7Holmes Jr., D.R. Reddy V.Y. Gordon N.T. et al.Long-term safety and efficacy in continued access left atrial appendage closure registries.J Am Coll Cardiol. 2019; 74: 2878-2889Crossref PubMed Scopus (99) Google Scholar,8Holmes Jr., D.R. Doshi S.K. Kar S. et al.Left atrial appendage closure as an alternative to warfarin for stroke prevention in atrial fibrillation: a patient-level meta-analysis.J Am Coll Cardiol. 2015; 65: 2614-2623Crossref PubMed Scopus (419) Google Scholar this analysis improves the power to evaluate sex-specific outcomes from the early WATCHMAN experience that included 30% to 39% of women despite having a similar lifelong risk of atrial fibrillation (AF) compared with men. With these data sets combined, the experience of 754 women is reported, including 646 who underwent implantation of WATCHMAN 2.5. Among pooled randomized patients, when compared with those treated with warfarin, the authors found a statistically significant reduction in hemorrhagic stroke among men treated with LAAO (adjusted hazard ratio, 0.163; 95% CI, 0.045-0.593; P <.05) but not among women treated with LAAO (adjusted hazard ratio, 0.319; 95% CI, 0.053-1.923; P =.21). When all 4 data sets were combined and stratified by sex in a time-to-event analysis, warfarin was associated with a significant increase in the risk of hemorrhagic stroke among men and women (P <.05 for both). There were no significant differences seen in ischemic stroke or all-cause mortality between LAAO and warfarin in the pooled group of men or women. Compared with previous work, this research focuses on sex-based outcomes in a manner that is actionable at the bedside by asking: What are the risks and benefits of LAAO versus warfarin for the patient in front of me? When engaging patients in shared decision-making, as is a requirement for LAAO coverage by the Centers for Medicare and Medicaid Services, the patient-centered comparison is not between a patient who is a woman and a patient who is a man. Rather, the comparison of interest is between LAAO and anticoagulation for a specific patient based on their specific characteristics—including sex. On the other hand, comparisons between men and women are valuable when targeting quality improvement initiatives, such as safe femoral access strategies for smaller patients, but are less useful in patient-centered decision-making. This work does not ask the following question: How can AF-related stroke risk be maximally reduced? The process of answering this question is ongoing and incorporates considerations across cardiovascular medicine and surgery, but in most cases, includes anticoagulation regardless of other interventions, such as surgical LAAO9Whitlock R.P. Belley-Cote E.P. Paparella D. et al.LAAOS III InvestigatorsLeft atrial appendage occlusion during cardiac surgery to prevent stroke.N Engl J Med. 2021; 384: 2081-2091Crossref PubMed Scopus (238) Google Scholar or AF suppression with ablation10Kirchhof P. Camm A.J. Goette A. et al.EAST-AFNET 4 Trial InvestigatorsEarly rhythm-control therapy in patients with atrial fibrillation.N Engl J Med. 2020; 383: 1305-1316Crossref PubMed Scopus (810) Google Scholar or antiarrhythmics.11Hohnloser S.H. Crijns H.J. van Eickels M. et al.ATHENA InvestigatorsEffect of dronedarone on cardiovascular events in atrial fibrillation.N Engl J Med. 2009; 360: 668-678Crossref PubMed Scopus (991) Google Scholar As the authors note, their work was limited by the historical nature of the data because comparisons between device-based and drug-based AF-related stroke reduction that informs shared decision-making will vary with increasing use of direct-acting oral anticoagulants and newer versions of LAAO devices among other changes. Importantly, these evolutions likely affect sex subgroups differently; for example, women have a greater background risk of stroke at older ages. Hence, similar to as was performed in this analysis, the medical device ecosystem—including regulators—should be encouraged to examine and reexamine extant data sources for changing signals of risk and benefit. This process is particularly efficient when the data examined are repurposed from previous regulatory investigations, as in this case. The Center for Devices and Radiological Health has been a leader in Patient Preference Information in research efforts, particularly efforts pertaining to “preference-sensitive decisions” in which there is not one choice that is superior to others; the evidence supporting one option over another varies; and patient preferences are distinct across diverse groups.12US Food and Drug AdministrationPatient Preference Information—Voluntary Submission, Review in Premarket Approval Applications, Humanitarian Device Exemption Applications, and De Novo Requests, and Inclusion in Decision Summaries and Device Labeling. US FDA, 2016Google Scholar Recommendations for performing this kind of research include engaging patients early and often in meaningful ways, including scientific question generation, selection of comparator groups and outcomes, and in framing trial results. When considering options for reducing AF-related stroke risk as part of shared decision-making, best practices include using an evidence-based decision aid to elicit patient goals and values information, and data, such as those from the study by Jiang et al,1Jiang H. Zheng Q. Cheng Y.J. et al.Sex-specific long-term outcomes of Watchman left atrial appendage closure for stroke prevention in atrial fibrillation.J Soc Cardiovasc Angiogr Interv. 2023; 2: 100541Google Scholar help address gaps in knowledge to better inform these preference-sensitive decisions. Finally, in addition to work like this that harnesses the power of a regulatory body to combine patient-level data to address unanswered questions in major subgroups, it is important to recognize how the efforts at The Center for Devices and Radiological Health have increased the focus on reaching diverse patient populations in clinical trials. For example, the FDA has released a draft document on Diversity in Clinical Trials for public comment.13US Food and Drug AdministrationDiversity Plans to Improve Enrollment of Participants From Underrepresented Racial and Ethnic Populations in Clinical Trials; Draft Guidance for Industry. US FDA, 2022Google Scholar This effort, and the above-described data, in addition to the manuscript centering data on decision-making that is relevant to patients, is laudable and highlights the opportunities for synergy among FDA regulators, clinicians, investigators, and cardiovascular device manufacturers. In this way, the care we provide at the bedside is truly “the product of a village.” Megan Coylewright reports research support for Edwards Life Sciences and Boston Scientific and consulting for Edwards Life Sciences, Boston Scientific, Medtronic, and Occlutech. Emily P. Zeitler reports that she has received a research grant from Boston Scientific and has served as a consultant to Boston Scientific, Sanofi, and Pfizer. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors." @default.
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• W4313478737 title "The “Product of a Village”: FDA as a Partner in Evidence Generation" @default.
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