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Head and Neck Imaging订阅

Comparative Study of Cardiovascular MRI and CTA in the Measurement of Aortic Annulus Diameter before Aortic Valve Replacement

Author：WEN Zhi-lin, QUAN Guo-biao, ZHOU Wei-wen, et al

affiliation：Zhanjiang Second People's Hospital, Zhanjiang 524003, Guangdong Province, China

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Abstract

Objective This study was designed to assess and compare the diameter of the aortic valve annulus before the transcatheter aortic valve replacement (TAVR) before the non-contrast cardiovascular magnetic resonance (MRI) and computed tomography angiography (CTA) measuring. Methods A total of 20 patients with aortic stenosis (mean age (81.8±5.4) years) underwent MRI and CTA prior to TAVR. The aortic valve area was measured by MRI and MRA in the diastolic mid. The 4-point scale was used to assess MR image quality and aortic valve calcification. Results The average detection time was (14±4.2)min. The image quality is (3.1±0.9). The average degree of calcification is similar. According to Bland-Altman analysis, MRA and CTA had no significant difference in the measurement of aortic valve area [mean difference - 3.1 mm2 (-44.4 mm2 , 38.2 mm2 )]. Conclusion The evaluation of aortic valve area and calcification by MRI is accurate and reliable, and it is suitable for the patients with the risk of contrast nephropathy.

【Keyword】Magnetic Resonance Angiography; Computed Tomography Angiography; Transcatheter Aortic Valve Replacement; TAVI; TAVR

【Chart number】R714.252

【Document Identification Number】A

【DOI】 10.3969/j.issn.1672- 5131.2018.01.024

Chinese journal of CT and MRI

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