Multipurpose Radiofrequency Wire System Improves Procedural Workflow Compared With Mechanical Needle for Left Atrial Appendage Closure
Bibliographic record
Abstract
Percutaneous left atrial appendage closure (LAAC) is a rapidly emerging therapy for atrial fibrillation patients not suitable for anticoagulation. The study compared procedural time and adverse events between mechanical Brockenbrough needle and the VersaCross radiofrequency system for WATCHMAN implantation. All patients undergoing LAAC at Vancouver General Hospital were prospectively enrolled. Procedural workflow, times, and complications were compared in 20 patients: 10 using VersaCross radiofrequency system and 10 using Brockenbrough needle. Transseptal puncture success was 100%. The radiofrequency wire reduced total procedural time by 27% (21.5 vs 29.5 minutes; P=.008) and fluoroscopy and contrast use without increasing complications. One ischemic stroke occurred during 360-day follow-up unrelated to the device. The multipurpose radiofrequency system streamlines LAAC workflow and is a safe, efficient alternative to mechanical puncture. Larger randomized trials are warranted to confirm these benefits.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.004 | 0.003 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".