Abstract 19610: Safety of Percutaneous Left Atrial Appendage Suture Ligation: Results From the Largest Us Registry
Bibliographic record
Abstract
Background: Epicardial ligation of left atrial appendage (LAA) is an attractive alternative to oral anticoagulation for patients with atrial fibrillation and high risk of bleeding. Objectives: To delineate the safety of epicardial ligation of the LAA for stroke prevention in atrial fibrillation Methods: This is a retrospective, multicenter registry of consecutive patients undergoing LAA ligation with the LARIAT device at 14 U.S. sites. The primary endpoint was procedural success, defined as device success (suture deployment and <5 mm leak by post-procedure transesophageal echocardiography), and no major complication at discharge (death, myocardial infarction, stroke, major bleeding requiring transfusion, or cardiac perforation requiring cardiac surgery). Results: A total of 610 patients underwent LARIAT exclusion of LAA. The mean age of the participants was 71 (SD: ± 10) years. The mean CHADs2VASc and HASBLED score was 2.74(±1.33) and 3.87 (±1.8) respectively. Epicardial access was obtained using micro-puncture needle in 60 percent of the cases. The acute closure was achieved in 554 (91 %) patients. Cardiac perforation needing continued drainage and transfusion occurred in 12 patients (1.96 %). Perforation of epigastric artery occurred in 2 patients (0.3 %). Eight patients (1.3 %) required open heart surgery. Five patients required > 2 weeks of treatment for pericarditis. No myocardial infarction or stroke happened in the peri-procedural period. One patient died as complication of the procedure. A follow up transesophageal echocardiogram (TEE) was performed in 76 % of the patients that showed a leak of < 5 mm and thrombus in 49 (8 %) and 12 (1.96 %) patients respectively. Conclusions: In this largest multicenter experience of LAA ligation with the LARIAT device, the rate of acute closure was high with significantly fewer complications compared to limited contemporary data. The use of micro-puncture is probably safer approach to avoid cardiac injury during epicardial access. A prospective randomized trial is required to adequately define clinical efficacy, optimal post-procedure medical therapy, and the effect of operator experience on procedural safety.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.007 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".