Commercial Implant Experience of a Helix‐Fixation Dual‐Chamber Leadless Pacemaker
Bibliographic record
Abstract
INTRODUCTION: The AVEIR DR pacemaker (Abbott) is a dual-chamber leadless pacemaker (LP) system that includes right atrial and right ventricular helix-fixation LPs (ALP, VLP), with atrioventricular synchrony maintained via wireless communication between the two devices. The initial, multi-center commercial implant experience of the AVEIR DR dual-chamber LP system has yet to be evaluated. METHODS: Patients indicated for dual-chamber pacing after US commercial release were consecutively included. Implant procedural characteristics were evaluated, and electrical parameters were measured during pre-fixation mapping, post-fixation tether mode, after LP release, and before patient discharge. Any acute procedure- or device-related complications within 30 days were noted. RESULTS: Patients were implanted with AVEIR DR per standard practice (N = 175 at 8 centers; 72 ± 11 years; 60% male; 62% sinus node dysfunction, 37% AV block; 83% de novo implants). ALPs were implanted predominantly in the base of the right atrial appendage (82%), VLPs in the mid-to-apical right ventricular septum (94%). Pre-fixation mapping allowed repositioning to be avoided in 95% of ALPs and VLPs. The total procedure duration was 64 ± 33 min, from initial incision to final suture, with a cumulative fluoroscopy duration of 13 ± 8 min. In both LPs, capture thresholds and sensed amplitudes improved significantly before patient discharge (ALP 1.2 ± 1.0 V, 2.1 ± 1.1 mV; VLP 0.8 ± 0.6 V, 9.5 ± 3.8 mV). At 30 days post-implant, 99% of patients were complication-free. CONCLUSION: The initial commercial experience of the helix-fixation, dual-chamber LP system demonstrated safe and efficient implantation with clinically acceptable electrical metrics and minimal acute complications.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".