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In vitro Assessment of Aortic Regurgitation Using Four-Dimensional Flow Magnetic Resonance Imaging
Published on: February 25, 2022
Contemporary Evaluation and Clinical Treatment Options for Aortic Regurgitation
Mark Lebehn1, Torsten Vahl1,2, Polydoros Kampaktsis1
1Department of Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA.
Insights
Aortic regurgitation (AR) affects many older adults. Accurate assessment of AR severity and its impact on the left ventricle is crucial for timely intervention and improved outcomes.
Area of Science:
- Cardiology
- Valvular Heart Disease
- Medical Imaging
Background:
- Aortic regurgitation (AR) is a prevalent valvular heart disease, increasing with age.
- Understanding aortic valve and root structure is key to AR etiology and mechanisms.
- Acute and chronic AR have distinct hemodynamic impacts and management strategies.
Purpose of the Study:
- To review the importance of aortic regurgitation (AR) in an aging population.
- To discuss the differing hemodynamic impacts and management of acute versus chronic AR.
- To highlight the need for multiparametric imaging in assessing AR severity and left ventricular function.
Main Methods:
- Review of current literature on aortic regurgitation (AR) pathophysiology and management.
- Analysis of diagnostic imaging modalities including echocardiography, CT, and CMR.
- Evaluation of emerging transcatheter therapies and assessment methods for AR.
Main Results:
- Current guidelines may lead to delayed intervention for chronic AR, impacting outcomes.
- Multiparametric imaging is essential for accurate quantitation of ventricular function and AR severity.
- Echocardiography is primary, supplemented by CT and CMR.
Conclusions:
- Accurate assessment of AR severity and LV function is critical for optimal patient outcomes.
- Novel imaging and therapeutic approaches are needed to improve management, especially for high-risk patients.
- Timely intervention, guided by comprehensive imaging, is key in managing aortic regurgitation.
Abstract:
Aortic regurgitation (AR) is the third most frequent form of valvular disease and has increasing prevalence with age. This will be of increasing clinical importance with the advancing age of populations around the globe. An understanding of the various etiologies and mechanisms leading to AR requires a detailed understanding of the structure of the aortic valve and aortic root. While acute and chronic AR may share a similar etiology, their hemodynamic impact on the left ventricle (LV) and management are very different. Recent studies suggest current guideline recommendations for chronic disease may result in late intervention and suboptimal outcomes. Accurate quantitation of ventricular size and function, as well as grading of the severity of regurgitation, requires a multiparametric and multimodality imaging approach with an understanding of the strengths and weaknesses of each metric. Echocardiography remains the primary imaging modality for diagnosis with supplemental information provided by computed tomography (CT) and cardiac magnetic resonance imaging (CMR). Emerging transcatheter therapies may allow the treatment of patients at high risk for surgery, although novel methods to assess AR severity and its impact on LV size and function may improve the timing and outcomes of surgical intervention.
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