Ivabradine as a Treatment for Postural Orthostatic Tachycardia Syndrome: A Systematic Review
Bibliographic record
Abstract
ABSTRACT: Ivabradine is one of several off-label treatments for patients with postural orthostatic tachycardia syndrome (POTS). We conducted a systematic review of the literature to identify studies that evaluate ivabradine treatment in patients with POTS. The results were narratively synthesized given methodological heterogeneity among the identified studies. There were 11 studies included in the analysis with 305 participants between 2008 and 2020. The only randomized trial of 22 patients showed that ivabradine improved heart rate compared with placebo, and there were symptomatic benefits in terms of physical functioning and social functioning. All studies suggested a reduction in heart rate with ivabradine treatment; the proportion of patients with symptomatic benefit ranged from 67% to 100%. One study using the Malmo POTS score found that ivabradine improved the total score, including key components such as light-headedness with standing, feeling faint, feeling rapid heart rate, and chest pain. Although 2 studies did not report side effects and 2 studies described no side effects, others reported adverse effects including bradycardia, nausea, worsening syncope, palpitations, flushing, light sensitivity, headache, light-headedness, fatigue, scalded tongue, itching and burning, and visual disturbance. In conclusion, there is low-quality evidence derived from small observational studies and 1 small randomized trial that ivabradine is effective in reducing heart rate and improving symptoms in patients with POTS. The exact role of ivabradine in treatment of POTS needs to be clarified in further randomized trials and more robust evidence.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.003 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.019 | 0.033 |
| Bibliometrics | 0.001 | 0.001 |
| 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; both teacher heads agree on what is shown here.
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".