Why the study?
Patients with Marfan syndrome require frequent aortic monitoring where accurate measurement is crucial, prompting a comparison of updated 2022 ACC/AHA imaging recommendations with the 2010 guideline.
Does applying the 2022 ACC/AHA guideline measurement conventions improve concordance and reduce clinically unacceptable differences (>2 mm) between TTE and ECG-triggered CT aortic diameter measurements compared to the 2010 guideline in patients with Marfan syndrome and related disorders?
Does applying the 2022 ACC/AHA guideline measurement conventions improve concordance and reduce clinically unacceptable differences (>2 mm) between TTE and ECG-triggered CT aortic diameter measurements compared to the 2010 guideline in patients with Marfan syndrome and related disorders?
The 2022 ACC/AHA aortic imaging guidelines significantly improve measurement concordance between TTE and ECG-triggered CT in patients with Marfan syndrome and related disorders compared to the 2010 guidelines, though clinically relevant discrepancies (>2 mm) still occur in nearly 30% of cases.
Answers are grounded in this paper and cite their sources.
2022 guideline improves TTE-CT agreement in Marfan aortic monitoring; supports updated recommendations but leaves open clinical outcome impact.
Background: Patients diagnosed with Marfan syndrome or a related syndrome require frequent aorta monitoring using imaging techniques like transthoracic echocardiography (TTE) and computed tomography (CT). Accurate aortic measurement is crucial, as even slight enlargement (>2 mm) often necessitates surgical intervention. The 2022 ACC/AHA guideline for Aortic Disease Diagnosis and Management includes updated imaging recommendations. We aimed to compare these with the 2010 guideline. Methods: This retrospective study involved 137 patients with Marfan syndrome or a related disorder, undergoing TTE and ECG-triggered CT. Aortic diameter measurements were taken based on the old 2010 guideline (TTE: inner edge to inner edge, CT: external diameter) and the new 2022 guideline (TTE: leading edge to leading edge, CT: internal diameter). Bland-Altman plots compared measurement differences. Results: Using the 2022 guideline significantly reduced differences outside the clinical agreement limit from 49% to 26% for the aortic sinus and from 41% to 29% for the ascending aorta. Mean differences were -0.30 mm for the aortic sinus and +1.12 mm for the ascending aorta using the 2022 guideline, compared to -2.66 mm and +1.21 mm using the 2010 guideline. Conclusion: This study demonstrates for the first time that the 2022 ACC/AHA guideline improves concordance between ECG-triggered CT and TTE measurements in Marfan syndrome patients, crucial for preventing life-threatening aortic complications. However, the frequency of differences >2 mm remains high. Clinical Relevance/Application: Accurate aortic diameter measurement is vital for patients at risk of fatal aortic complications. While the 2022 guideline enhances concordance between imaging modalities, frequent differences >2 mm persist, potentially impacting decisions on aortic repair. The risk of repeat radiation exposure from ECG-triggered CT, considered the 'gold standard', continues to be justified.
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Kolck et al. (2024) studied this question.
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