Tachycardia-Induced Cardiomyopathy: A Case Series and a Literature Review
Bibliographic record
Abstract
Tachycardia-induced cardiomyopathy (TIC), also known as arrhythmia-induced cardiomyopathy or tachycardiomyopathy, is a reversible form of heart failure characterized by persistent tachyarrhythmias and associated ventricular dysfunction. TIC is characterized by the reversal of myocardial damage with resolution of the arrhythmia. Early diagnosis of TIC is imperative, as the treatment course is distinct from cardiomyopathy of other or unknown causes. However, distinguishing TIC from tachycardia secondary to increased catecholamines due to congestive heart failure can be very challenging. There are relatively few paediatric reports, and herein we present a case series of 48 paediatric patients with TIC from literature (2014-2024). We also present 4 illustrative cases with TIC seen at our site (BC Children's Hospital, Vancouver, Canada). The mean age in this case series was 6.98 ± 4.9 years. The majority of patients had ectopic atrial tachycardia (41.7%), followed by permanent junctional reciprocating tachycardia (20.8%), ventricular tachycardia (16.7%), and atrioventricular re-entrant tachycardia or atrioventricular nodal re-entrant tachycardia (10.4%). Pharmacologic treatment was the predominant therapy, but 70.8% of patients needed at least 1 ablation procedure. All patients demonstrated significant improvement in left ventricular ejection fraction after treatment, with most achieving at least near-normal ejection fractions in 80 days on average since presentation. In conclusion, TIC is overall a treatable condition with challenging diagnosis but generally has a favourable prognosis when diagnosed and treated appropriately. This article emphasizes the importance of considering TIC in the differential diagnosis of tachycardia in the context of reduced ventricular function, to recognize it and to enable targeted treatment initiation as soon as possible.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.000 | 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; 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".