The Ross procedure in children: preoperative haemodynamic manifestation has significant effect on late autograft re-operation☆
Notice bibliographique
Résumé
OBJECTIVES: The Ross procedure is the aortic valve-replacement procedure of choice in children. Nonetheless, late autograft re-operation for dilatation and/or valve regurgitation is of concern. We examined whether preoperative haemodynamic manifestation (e.g., stenosis, regurgitation and mixed aortic valve disease) affected late re-operation risk. METHODS: Medical records of 227 children who underwent the Ross procedure (1991-2004) were reviewed. Competing-risks methodology determined time-related prevalence and associated factors for two mutually exclusive end-states after the Ross procedure: (1) death prior to subsequent autograft re-operation and (2) autograft re-operation, with the remainder of patients being alive and free from subsequent autograft re-operation. RESULTS: There were 162 male patients (71%) in this study. Median age at surgery was 12.1 years (range: 1 week-18 years). The haemodynamic aortic valve dysfunction was primarily stenosis (n=40, 18%), primarily regurgitation (n=109, 48%) and mixed disease (n=78, 35%). Underlying pathology was rheumatic fever (n=104, 46%), congenital heart disease (n=113, 50%) and endocarditis (n=8, 3%). Competing-risks analysis showed that, at 10 years following the Ross procedure, ∼5% of patients had died, 16% had undergone autograft re-operation with aortic valve replacement and 79% were alive and free from autograft re-operation. Ten-year freedom from autograft re-operation for patients with preoperative stenosis, regurgitation and mixed disease was 97%, 69% and 93%, respectively, (p<0.001 for regurgitation vs others). Risk factors for increased risk of autograft re-operation were rheumatic fever (parameter estimates (PEs): 2.09 ± 0.75, p=0.006), and earlier year of surgery (PE: 0.20 ± 0.06, p=0.001). Ten-year freedom from homograft replacement was 81% and was not dependent on haemodynamic manifestation (PE: -0.16 ± 0.38, p=0.68). Significant factors for homograft replacement included fresh homografts (PE: 2.2 ± 0.63, p=0.01) and annular enlargement (PE: 1.11 ± 0.3, p=0.01). Ten-year freedom from cardiac re-operation other than auto-/homograft was 85%, higher in patients with preoperative aortic regurgitation (PE: 1.01 ± 0.42, p=0.02). Concomitant cardiac surgery was a significant factor for late cardiac re-operation other than auto-/homograft replacement (PE: 1.79 ± 0.39, p<0.001). CONCLUSIONS: The Ross procedure in children is associated with excellent survival. Late autograft re-operation may be required; however, it is more common in children with preoperative aortic regurgitation, especially those with rheumatic fever. Better patient selection in later era has mitigated the risk of autograft re-operation. Continued improved candidate selection, along with modifications in autograft implantation and root/sinotubular stabilisation techniques, may further decrease late autograft failure.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,004 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».