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Abstract #2705

Comparison of right ventricular volume measurements obtained using transaxial and short-axis slices acquired by cardiac MRI in patients with chronic thromboembolic pulmonary hypertension

Rieko Ishimura 1 , Kenich Yokoyama 1 , Toshiya Kariyasu 1 , Shigehide Kuhara 2 , and Toshiaki Nitatori 1

1 department of radiology, Kyorin University, Mitaka, Tokyo, Japan, 2 Toshiba medical systems, Otawara, Tochigi, Japan

Severe pulmonary hypertension(PH) causes significant dilatation of the right ventricle(RV), and the compensatory hypertrophy of the trabeculae carneae in response to PH leads to severe deformation of the RV. This deformation makes it difficult to identify the anatomical positions of the tricuspid valve and pulmonary valve in CMR imaging. TAX image is more difficult to identify of the interface between the blood within the cardiac chambers and the myocardium due to partial volume effects. In patients with diseases associated with deformation of RV, such as CTEPH, SAX images may be more useful than TAX images for right heart functional analysis.

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