Modification of Epinephrine-induced Arrhythmias by N-Acetyl-L-Cysteine and Vitamin E
Bibliographic record
Abstract
Sprague-Dawley rats were pretreated for 21 days with N-acetyl-L-cysteine (NAC) or vitamin E to investigate their influence on arrhythmias induced by a bolus injection or by cumulative doses of epinephrine. Electrocardiographic analysis revealed that both NAC and vitamin E decreased the duration and increased the time of onset of epinephrine-induced arrhythmias in a dose-dependent manner. The antiarrhythmic effects of NAC were comparable with those seen in the vitamin E-pretreated animals. The lipid peroxidation due to cumulative doses of epinephrine was reduced in both pretreated groups; however, NAC, unlike vitamin E, failed to decrease the basal level of malondialdehyde. Although the plasma concentrations of both norepinephrine and epinephrine were markedly increased, the level of aminochromes on epinephrine administration was decreased by both NAC and vitamin E pretreatments. The results support the view that antioxidants may prevent the catecholamine-induced heart rhythm disorders by reducing the formation of oxidized catecholamines.
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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".