Polymorphic ventricular tachycardia associated with an episode of reflex syncope: Is this the needle in the haystack?
Bibliographic record
Abstract
Key Teaching Points•Reflex syncope is common in the young and typically is benign. We present a case of reflex syncope associated with nonsustained polymorphic ventricular tachycardia.•In susceptible individuals, autonomic stimuli may trigger significant arrhythmias, other than the anticipated bradyarrhythmias.•In some individuals with no apparent risk factors, autonomic nervous system miscues may lead to life-threatening arrhythmias, with the potential for progressing to sudden cardiac arrest.•This case may provide insight into the 50% of individuals who experience a cardiac arrest with no identifiable cause. •Reflex syncope is common in the young and typically is benign. We present a case of reflex syncope associated with nonsustained polymorphic ventricular tachycardia.•In susceptible individuals, autonomic stimuli may trigger significant arrhythmias, other than the anticipated bradyarrhythmias.•In some individuals with no apparent risk factors, autonomic nervous system miscues may lead to life-threatening arrhythmias, with the potential for progressing to sudden cardiac arrest.•This case may provide insight into the 50% of individuals who experience a cardiac arrest with no identifiable cause.
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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 | 0.001 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.005 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.007 | 0.005 |
| Insufficient payload (model declined to judge) | 0.004 | 0.002 |
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".