Clinical challenges in the diagnosis and management of postural tachycardia syndrome
Bibliographic record
Abstract
Postural tachycardia syndrome (POTS) is a multifactorial clinical syndrome defined by an increase in heart rate of ≥30 bpm on standing from supine position (or ≥40 bpm in children). It is associated with symptoms of cerebral hypoperfusion that are worse when upright and improve when in supine position. Patients often have additional symptoms including severe fatigue and difficulty concentrating. There are several possible pathophysiologic mechanisms including hypovolaemia, small-fibre peripheral neuropathy and hyperadrenergic states. POTS can also be associated with several disorders including mastocytosis, Ehlers-Danlos syndrome (hypermobility type) and autoimmune disorders. The treatment is focused on symptom relief and not solely on reducing tachycardia. Given its varying presentations, it is important to employ a practical, mechanism-focused approach to the diagnosis and management of POTS.
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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 | 0.008 | 0.021 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.003 | 0.004 |
| Research integrity | 0.006 | 0.014 |
| Insufficient payload (model declined to judge) | 0.003 | 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".