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Evaluation of Coronary Circulation after Arterial Switch Operation
Mariana Nicoletti Ferreira Baldo1, Henrique Simão Trad2, Tarcisio José da Silva Junior1
1Universidade de São Paulo , Ribeirão Preto , SP - Brasil.
Insights
Coronary artery evaluation after arterial switch operation (ASO) is challenging. This study found a low incidence (3.3%) of coronary stenosis in late ASO patients, highlighting the need for screening guidelines.
Area of Science:
- Cardiovascular Surgery
- Pediatric Cardiology
- Diagnostic Imaging
Background:
- Coronary artery evaluation poses a significant clinical challenge in patients following arterial switch operation (ASO).
- Late assessment of coronary arteries is crucial for long-term patient outcomes.
Purpose of the Study:
- To correlate anatomical findings from cardiac computed tomography (CCT) with clinical evaluations.
- To diagnose coronary obstruction in patients long after ASO.
Main Methods:
- Sixty-one patients (mean age 9.4 years) who underwent ASO were assessed.
- Evaluations included echocardiography, electrocardiography, cardiopulmonary exercise testing, and CCT.
- CCT was used to evaluate coronary artery anatomy and functional capacity.
Main Results:
- Cardiac computed tomography identified coronary stenosis in only 3.3% of patients.
- All patients with coronary stenosis were asymptomatic.
- No signs of myocardial ischemia were detected through clinical tests.
Conclusions:
- The incidence of coronary abnormalities in late ASO patients was 3.3% in this cohort.
- Current guidelines lack clarity on screening protocols for asymptomatic patients with potential coronary obstruction post-ASO.
- Further research is needed to establish screening and management strategies.
Background:
Coronary artery evaluation remains after arterial switch operation a clinical challenge.
Objective:
This study aims to correlate anatomical changes diagnosed by cardiac computed tomography (CCT) with physiological alterations on clinical evaluation to diagnose coronary obstruction in late ASO patients.
Methods:
This study included 61 consecutive patients with mean age of 9.4 years who underwent ASO. The patients were submitted to echocardiography, electrocardiography, cardiopulmonary exercise test, and cardiac computed tomography to evaluate functional capacity and coronary artery anatomy.
Results:
Cardiac computed tomography revealed that only 3.3% of the patients had coronary stenosis. These patients were asymptomatic, and no signs of myocardial ischemia were detected by the tests.
Conclusion:
The incidence of coronary abnormalities in late ASO patients was 3.3% in our cohort. There is no clear guideline as to why, when, and how these patients should be screened or what to propose when a coronary obstruction is diagnosed in asymptomatic patients.
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