Retrograde cardioplegia, effec s of coronary venous perfusion on myocardial energy metabolism, contractile function and myocardial perfusion in neonatal hearts
Bibliographic record
Abstract
Objective. This study tested the hypothesis that a heart maintained in arrest by retrograde cardioplegia (RC) can recover metabolic and contractile function to a level comparable to that of antegrade cardioplegia (AC). Methods. Isolated Langendorff piglet hearts were subjected a protocol consisting of 30 minutes of control perfusion, 45 minutes of arrest, and 30 minutes of reperfusion. During the control and reperfusion periods, the hearts were pelfused using Krebs-Henseleit (K-H) solution. Cardioplegic arrest was induced with two minutes of AC. Arrest was maintained for 43 minutes with continuous RC in group 1. The hearts in roup 2 were subjected to 45 minutes of continuous AC. Myocardial energy metabolism and contractile function in the two groups were compared by assessing energy metabolites using $\\sp{31}$P MR spectroscopy and determining myocardial O$\\sb2$ consumption (MVO$\\sb2)$ and measuring intraventricular pressure. (Abstract shortened by UMI.)
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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) | 0.001 | 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".