Biochemical Mediators of Ventricular Arrhythmias in Ischemic Heart Disease
Bibliographic record
Abstract
Sudden cardiac death is a euphemism for ventricular fibrillation (VF) in the majority of cases of ischemic heart disease. It occurs most commonly during acute (<1 h duration) ischemia. There is a hierarchy of mechanisms that includes electrophysiological dysfunction and the accumulation or depletion of local cardiac biochemicals (mediators). Unfortunately, there are many biochemicals that accumulate or are depleted during ischemia and infarction, so it is not yet clear which are the true mediators. Candidates include potassium, catecholamines, histamine, serotonin, lysophos-phatidylcholine, palmitylcarnitine, platelet activating factor, prostaglandins, leukotrienes, thromboxane A2, angiotensin-II, endothelin, opioids, protons, and thrombin. Mediators may elicit arrhythmias by acting in series (one biochemical or the effects of its depletion determining the arrhythmogenicity of another) or in parallel (biochemicals or their depletion operating independently to cause ventricular arrhythmias). It remains to be determined whether a series or parallel model best decribes arrhythmogenesis during acute ischemia. A better understanding of the relative importance of individual mediators, and the manner in which their effects interact would greatly assist drug development for prevention of VF.
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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) | 0.001 | 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 | 0.001 |
| 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".