Multimodal Imaging Evaluation and Prognostic Analysis of Participants After Arterial Switch Operation

Study Overview
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Brief Summary
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The aims of this study are to Identify the early and midterm outcomes in terms of mortality and reoperation of the arterial switch operation (ASO). Identifying the influence of coronary artery anomalies on the in-hospital and post-discharge prognosis after ASO. Evaluate the predictors for neoaortic valve regurgitation after ASO. Explore the risk factors for neopulmonary artery stenosis after ASO.

Detailed Description
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This study will enroll participants with transposition of the great arteries (TGA) and double outlet right ventricle with subpulmonary ventricular septal defect (VSD) (Taussig-Bing anomaly, TBA). The cardiac structure and function will be evaluated by multimodal imaging including transthoracic echocardiographic examination, stress echocardiography, cardiac computed tomography scan, cardiovascular magnetic resonance imaging. And the study aimed to: Identify the early and midterm outcomes in terms of mortality and reoperation of the arterial switch operation (ASO) in participants with transposition of the great arteries (TGA) and double outlet right ventricle with subpulmonary ventricular septal defect (VSD) (Taussig-Bing anomaly, TBA). Identifying subclinical coronary abnormalities and silent myocardial ischemia by multimodel Imaging, further determine the influence of coronary artery anomalies on the in-hospital and post-discharge prognosis in participants with TGA and TBA after ASO. Evaluate the time course and predictors for neoaortic root dilatation and neoaortic valve regurgitation in participants with TGA and TBA after ASO by multimodel Imaging. Assess the structure of the right ventricular outflow tract and neopulmonary artery in participants with TGA and TBA after ASO by multimodel Imaging, and explore the incidence and risk factors for neopulmonary artery stenosis.

Official Title
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Multimodal Imaging Evaluation and Prognostic Analysis of Participants With Transposition of the Great Arteries After Arterial Switch Operation: a Multi-site Clinical Study

Conditions
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Arterial Switch Operation

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: ·Participants with the diagnosis of TGA or TBA underwent ASO. Exclusion Criteria: Patients with various forms of TGA undergoing Réparation à l'Etage Ventriculaire procedure Patients with various forms of TGA undergoing Rastelli procedure Patients with various forms of TGA undergoing Nikaidoh procedure Patients with various forms of TGA undergoing Fontan operation Patients with various forms of TGA undergoing atrial repair (Mustard or Senning) operations ASO is used as a corrective therapy for prior operations.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| ASO group<br>All participants with TGA/TBA after ASO | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| All cause mortality | Number of participants with all cause mortality after ASO | Ten years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cardiac caused mortality | Number of participants with cardiac caused mortality after ASO | Ten years | 
| All cause reoperation | Number of participants with all cause reoperation after ASO | Ten years | 
| Right-ventricular outflow tract obstruction and pulmonary branch stenosis | Degree of more than moderate right-ventricular outflow tract obstruction in millimetre of mercury, degree of pulmonary branch stenosis in millimetre of mercury | Ten years | 
| Neoaortic valve regurgitation | Vena contracta width of neoaortic valve regurgitation in milimetre, ratio of Jet width/LVOT width in percentage | Ten years |