Congenital Coronary Artery Anomalies and Sudden Cardiac Death
Marco Schiavone1, Cecilia Gobbi2, Alessio Gasperetti3,4
1Cardiology Unit, ASST Fatebenefratelli Sacco - Luigi Sacco University Hospital, University of Milan, Via G.B. Grassi, 74, 20157, Milan, Italy. marco.schiavone11@gmail.com.
Insights
Coronary artery anomalies (CAAs), especially anomalous aortic origin of a coronary artery (ACAOS), pose a high risk for sudden cardiac death (SCD) in athletes. Understanding ACAOS pathophysiology is crucial for effective SCD risk stratification and management.
Area of Science:
- Cardiology
- Congenital Heart Disease
- Sports Cardiology
Background:
- Coronary artery anomalies (CAAs) are rare congenital conditions with variable clinical presentations, from asymptomatic findings to sudden cardiac death (SCD).
- Congenital CAAs, particularly anomalous aortic origin of a coronary artery (ACAOS), present a significant risk for myocardial ischemia and SCD, especially in young athletes during or after strenuous physical activity.
- The precise pathophysiological mechanisms linking CAAs to SCD remain incompletely understood, complicating risk stratification for incidentally diagnosed cases.
Purpose of the Study:
- To review the pathophysiology and clinical impact of anomalous aortic origin of a coronary artery (ACAOS).
- To summarize mechanisms by which ACAOS interferes with coronary artery function, potentially leading to life-threatening arrhythmias and SCD.
- To highlight the challenges in SCD risk stratification for ACAOS and the role of advanced imaging modalities.
Main Methods:
- Review of existing literature on coronary artery anomalies, focusing on ACAOS.
- Analysis of pathophysiological mechanisms contributing to myocardial ischemia and SCD in ACAOS.
- Evaluation of diagnostic imaging techniques, including echocardiography, cardiac magnetic resonance, and intravascular ultrasound.
Main Results:
- ACAOS is a significant risk factor for SCD, particularly in young athletes.
- Invasive intravascular ultrasound aids in identifying high-risk anatomic features and evaluating vessel stenosis.
- Multidisciplinary programs and validated SCD risk scores are essential for guiding therapeutic decisions (clinical or interventional/surgical).
Conclusions:
- ACAOS requires careful evaluation due to its association with SCD.
- Integrated imaging approaches, including intravascular ultrasound, enhance risk stratification.
- Further prospective studies are needed to validate diagnostic strategies and refine management protocols for ACAOS.
Abstract:
Coronary artery anomalies (CAAs) are a heterogeneous group of rare congenital diseases whose features and pathophysiological mechanisms are extremely variable, ranging from silent anomalies to sudden cardiac death (SCD) in the most severe cases. Although rare, congenital CAAs confer a high risk of myocardial ischemia and SCD, especially in young, previously "healthy" athletes during or immediately after vigorous exertion. Although some high-risk features that may lead to SCD have been identified, specific pathophysiological mechanisms related to SCD still remain poorly understood. When a CAA is incidentally diagnosed, optimal SCD risk stratification remains challenging, particularly in cases of anomalous aortic origin of a coronary artery arising from the opposite aortic sinus of Valsalva (ACAOS). In recent times, invasive imaging with intravascular ultrasound has gained a role in further identifying high-risk anatomic features; it has been integrated with traditional, non-invasive anatomic imaging evaluations, typically high-quality echocardiography, and cardiac magnetic resonance. Multidisciplinary programs and specific SCD risk scores should be developed in an endeavor to choose the right therapeutic approach, either clinical or interventional/surgical. Intravascular ultrasound is an extremely useful tool to evaluate vessel stenosis, even if prospective studies are still required to further validate this diagnostic strategy. In the present review, we aimed to analyze the pathophysiology and the clinical impact of ACAOS. We also summarized the predominant mechanisms for interference with normal coronary artery function, which might contribute to the onset of life-threatening arrhythmias and SCD.
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