Acrocyanosis Presentation in Postural Orthostatic Tachycardia Syndrome
Bibliographic record
Abstract
Postural orthostatic tachycardia syndrome (POTS) is a clinical chronic condition characterized by chronic fatigue and orthostatic symptoms associated with postural tachycardia. Early diagnosis and intervention can prevent significant functional consequences, although it can be very difficult to recognize. Two cases of POTS were presented in this article to help clinicians identify POTS more easily. Firstly, we present a 16-year-old adolescent female who was hospitalized for daily headaches, chronic fatigue, bilateral lower limbs discoloration and edema on standing position associated with orthostatic symptoms. All investigations were negative except for tilt table test, which showed heart rate increase of 80 beats per min, hypotension and discoloration of lower limbs, confirming POTS diagnosis. Non-pharmacological treatment showed no improvement. Midodrine was started because of beta-blockers intolerance with only moderate response. Secondly, we present a 17-year-old patient diagnosed with benign hypermobility syndrome who was referred for recurring episodes of palpitations associated with heat, nausea, headache and vertigo for the past year. She also reported dizziness and lower limbs discoloration on standing position. Previous investigations were negative. A clinical diagnosis of POTS was made based on history. Non-pharmacologic treatments with hydration, increase of salt intake and regular exercise were tested. However, no improvement was shown. Symptoms were controlled by a propranolol trial. These cases relate a clinical sign that can be easily identified by a clinician attempting to diagnose POTS. Acrocyanosis can be unquestioned or ignored. Clinicians should be attentive to this condition, and attempt to diagnose its underlying causes. This can result in lowering unnecessary testing and interventions. Patients with dependent acrocyanosis should be closely evaluated for the diagnosis of POTS. Int J Clin Pediatr. 2018;7(1-2):13-16 doi: https://doi.org/10.14740/ijcp293w
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".