Branch pulmonary artery flows calculated using velocity time integral correlate with MRI in pediatric pulmonary vein stenosis
Notice bibliographique
Résumé
Abstract Background/Introduction In pulmonary vein stenosis (PVS), serial echocardiograms are the mainstay in assessment of pulmonary vein disease. Development of gradients in stenotic pulmonary veins indicate progression of disease and influences timing of intervention. However, pulmonary vein gradients should be interpreted in the context of relative branch pulmonary artery (PA) flows to avoid misinterpretation of worsening PVS. To date, the comparison of branch PA flows derived from echocardiography compared to gold-standard from MRI has not been described. Purpose To determine if branch PA flows calculated using velocity time integral (VTI) correlate with MRI. Methods Single-center retrospective assessment of cardiac MRIs and echocardiograms in pediatric patients with pulmonary vein stenosis between February 2019 to May 2022. Cardiac MRIs and echocardiograms obtained within a 6-month period were compared. All causes and severity of PVS were included. Patients were excluded if echocardiographic assessment did not adequately visualize either branch PA or pulse wave Dopplers in the PAs were not performed. 20 patients with a mean age of 7.72 ± 5.93 years were included. Branch PA flows were derived using PA diameter in systole from the high parasternal view from which cross-sectional area (CSA) was calculated using CSA = pi(radius)^2. Using pulse wave Doppler in the branch PAs, VTI was measured as an averaged area under the curves over 3 beats. Relative branch PA flows were calculated using a product of CSA and VTI. We present branch PA flows indexed to body surface area. Results Mean RPA flows by VTI and MRI were 2.18 ± 1.36L/min/m2 and 2.34 ± 1.29L/min/m2, respectively. Mean LPA flows by VTI and MRI were 1.64±0.77L/min/m2 and 1.94±1.13L/min/m2, respectively. There were statistically significant correlations in branch PA flows comparing VTI to MRI (RPA correlation coefficient 0.549, p=0.02, LPA correlation coefficient 0.621, p=0.01). Conclusion Relative branch PA flows calculated using VTI correlate significantly with gold-standard from MRI. Lower correlation in the RPA may be due to Doppler angle. This is a feasible, complementary tool easily integrated as part of the standard echocardiographic assessment of PVS, that allows early detection of disease progression while decreasing the frequency of general anesthesia required for MRIs in young children. Expansion to a larger cohort is necessary to strengthen demonstrated correlations. Future work includes integration of branch PA flows in addition to pulmonary vein gradients to develop a PVS severity score in pediatrics to guide management.
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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 | 0,002 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,001 | 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 ».