Abstract 15358: Cardiac Remodeling in Adults Following Percutaneous Patent Ductus Arteriosus Closure: A Meta-analysis
Bibliographic record
Abstract
Introduction: Patent ductus arteriosus (PDA) is often recognized and treated with percutaneous closure in adults. However, the impact on cardiac reverse remodeling following PDA closure in adults is not clear. We performed a meta-analysis to characterize the extent of cardiac remodeling following percutaneous PDA closure in adults. Methods: MEDLINE and EMBASE were systematically searched for original studies that reported echocardiographic variables at baseline, immediately post-procedure (within 24 hours), and at follow-up (>1 month) in adults undergoing percutaneous PDA closure. Additionally, we included echocardiographic data from a cohort of patients >18 years of age that underwent percutaneous PDA closure between 01/2015 and 12/2019 at our centre. For parameters with sufficient data for pooling, weighted averages were calculated, and pooled differences were presented as weighted mean differences. Heterogeneity was assessed using the I 2 statistic. Results: After screening 278 abstracts, 5 studies were identified. When combined with our own cohort of 13 patients, our meta-analysis encompassed 244 patients. The weighted mean age of all patients was 33 years with all studies predominantly comprised of female patients and the median follow-up was 12 months (ranging from 1 month- 5 years across the studies). When compared to baseline, left ventricular ejection fraction (LVEF) decreased significantly immediately post-procedure and all parameters significantly decreased at follow-up (Table 1). Conclusions: As demonstrated by the decreases in the left ventricular and left atrial sizes, reverse remodeling was observed in adults who underwent percutaneous PDA closure. The significantly lower LVEF immediately post-procedure could reflect withdrawal of chronic volume overload or increased afterload. The clinical significance of the statistically significant lower LVEF on follow-up testing is unclear and requires further evaluation.
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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 | 0.009 | 0.018 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.009 | 0.038 |
| Bibliometrics | 0.004 | 0.005 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.003 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.004 | 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 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".