Long-term performance of a new catheter delivered lead
Bibliographic record
Abstract
The Medtronic 3830 lead is a 4Fr catheter-delivered bipolar, fixed screw lead that facilitates alternate right heart pacing whose short-term behavior has been characterized. Its longterm performance has not been described. This retrospective study assessed the longterm electrical performance of the lead. Implant and pre-hospital discharge [PHD], 12 and 52 weeks(wk) measurements of electrogram amplitude [EGM-mV], impedance (Imped-ohms), thresholds [V] were reviewed. 43 patients, aged 70 years (range 41–92) received 29 atrial(A) and 41 ventricular (V) leads. V implant site was apex(14), septum(25), other(2). A lead follow-up was 45±38 wks and 34±36 wks for V lead. Data are presented below(mean±D): *p≤0.01 compared to implant A and V lead impedance declined after implant A or V lead and threshold voltage rose on follow-up. There was no difference between RV apical versus non-apical implant site. The 3830 lead showed good chronic electrical performance over a year of follow-up regardless of implant site.
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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 | 0.000 | 0.000 |
| 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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".