Thrombocytopenia after transcatheter aortic valve implantation
Bibliographic record
Abstract
Thrombocytopenia frequently occurs after transcatheter aortic valve implantation (TAVI) but its impact is poorly understood. We aimed to analyze the incidence, clinical impact, and predictors of acquired thrombocytopenia after TAVI. This retrospective multicenter registry included 3913 patients undergoing TAVI with a baseline platelet count of ≥ 100 *10 9 /L. Acquired thrombocytopenia was defined as a decrease in baseline platelet count of ≥ 50% (early nadir ≤ 3 days and late nadir ≥ 4 days) post-TAVI. The primary endpoint was 30-day all-cause mortality and secondary endpoints were procedural safety and 2-year all-cause mortality. The incidence of acquired thrombocytopenia was 14.8% (early nadir: 61.5%, late nadir: 38.5%). Thirty-day mortality occurred in 112 (3.0%) patients and was significantly higher in those with thrombocytopenia (8.5% vs 2.0%, adjusted OR, 2.3; 95%CI, 1.3-4.2). Procedural safety was lower and 2-year mortality was higher in patients with thrombocytopenia vs those without (52.1 vs 77.0%; P < .001, and 30.2% vs 16.8%; HR, 2.2, 95%IC, 1.3-2.7) and especially in those with late nadir thrombocytopenia (45.8% vs 54.5%; P = .056, and 38.6% vs 23.8%, HR, 2.1; 95%CI, 1.5-2.9). Independent predictors of thrombocytopenia comprised baseline and procedural factors such as body surface area, absence of diabetes, poorer renal function, peripheral vascular disease, nontransfemoral access, vascular complications, type of transcatheter heart valve, and earlier TAVI procedures. Acquired thrombocytopenia was common (15%) after TAVI and was associated with increased short- and mid-term mortality and decreased procedural safety. Moreover, late thrombocytopenia compared with early thrombocytopenia was associated with significantly worse clinical outcomes. Further investigations are needed to elucidate the etiologic mechanisms behind these findings. La trombocitopenia es una complicación frecuente tras el implante percutáneo de válvula aórtica (TAVI). Sin embargo, hay poca información sobre sus causas y sus implicaciones clínicas. El objetivo de este estudio es analizar la incidencia, el impacto clínico y los factores predictores. Registro multicéntrico de 3.913 pacientes con recuento plaquetario basal ≥ 100*10 9 /l sometidos a TAVI. La trombocitopenia adquirida se definió como una reducción del recuento plaquetario ≥ 50% (nadir precoz ≤ 3. er y tardío ≥ 4. o día) tras el TAVI. El objetivo primario fue la mortalidad a 30 días y los objetivos secundarios, la seguridad del procedimiento y mortalidad a 2 años. La incidencia de trombocitopenia fue del 14,8% (nadir precoz: 61,5%, nadir tardío: 38,5%). La mortalidad a los 30 días fue del 3,0%, significativamente mayor en los pacientes con trombocitopenia (el 8,5 frente al 2,0%; OR ajustada = 2,3; IC95%, 1,3-4,2). La ausencia de seguridad del procedimiento y la mortalidad a los 2 años también fueron mayores en los pacientes con trombocitopenia (el 47,9 frente al 33,0%; p < 0,001, y el 30,2 frente al 16,8%; HR = 2,2; IC95%, 1,3-2,7) especialmente en aquellos con nadir tardío (el 54,2 frente al 45,5%, p = 0,056, y el 38,6 frente al 23,8%; HR = 2,1; IC95%, 1,5-2,9). Los predictores independientes de trombocitopenia incluyeron características basales y del procedimiento (área de superficie corporal, peor función renal, ausencia de diabetes, vasculopatía periférica, procedimientos realizados antes de 2015, acceso no transfemoral, complicaciones vasculares y tipo de válvula para TAVI). La trombocitopenia adquirida fue frecuente (15%) tras el TAVI, con mayor mortalidad a corto y medio plazo y menor seguridad del procedimiento. Además, la trombocitopenia tardía en comparación con la temprana se asoció a peores resultados clínicos. Sin embargo, son necesarias investigaciones futuras para dilucidar el mecanismo etiológico de estos hallazgos.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".