What is the Role of Cardiac Magnetic Resonance Imaging in Transcatheter Management of Aortic Valve Stenosis?

Transcatheter aortic valve replacement (TAVR) has changed the management paradigm of severe aortic stenosis. Cardiac magnetic resonance (CMR) has an emerging role in the evaluation of aortic stenosis. MRI provides excellent tissue characterization, endocardial definition, and is considered the gold standard for the assessment of left and right ventricular volumes, remodeling, mass and chamber function. In addition, CMR is free from ionizing radiation, noninvasive, and iodine-contrast sparing modality. CMR has a role in the assessment of annular dimensions, especially in individuals in whom computed tomography is contraindicated. This review discusses the contemporary role of CMR in patients with aortic stenosis, particularly in those being considered for TAVR.

经导管主动脉瓣置换术（Transcatheter aortic valve replacement, TAVR）已重塑重度主动脉瓣狭窄的诊疗格局。心脏磁共振成像（Cardiac magnetic resonance, CMR）在主动脉瓣狭窄的评估领域中展现出愈发重要的应用前景。磁共振成像（Magnetic Resonance Imaging, MRI）具备卓越的组织特性识别能力与清晰的心内膜显像效果，被视为评估左右心室容积、心室重构、心肌质量及心腔功能的金标准。此外，CMR不涉及电离辐射，属于无创且无需使用碘对比剂的检查手段。在计算机断层成像（Computed Tomography, CT）检查存在禁忌的患者中，CMR可用于瓣环尺寸的评估。本综述探讨了CMR在主动脉瓣狭窄患者，尤其是拟接受经导管主动脉瓣置换术的患者中的当代应用价值。