Abstract #2705

4D flow MR imaging for differentiation of pulmonary arterial hemodynamics in pre-capillary pulmonary hypertension

Hideki Ota¹, Koichiro Sugimura², Haruka Sato², Yuta Urushibata³, Yoshiaki Komori³, Hiroaki Shimokawa², and Kei Takase¹

¹Diagnostic Radiology, Tohoku University Hosipital, Sendai, Japan, ²Cardiovascular Medicine, Tohoku University Hosipital, Sendai, Japan, ³Research&Collaborations, Siemens Japan KK, Tokyo, Japan

Etiologies of pre-capillary pulmonary hypertension may be associated with pulmonary arterial hemodynamics. This study included 64 patients (pulmonary arterial hypertension [PAH], 25, chronic thromboembolic pulmonary hypertension [CTEPH], 39) who underwent 4D flow and cardiac MR imaging. Backward flow ratio and forward flow eccentricity in the pulmonary trunk as assessed by 4D flow MR and several cardiac MR parameters were different between two diseases. After controlling for age and mean pulmonary arterial pressure, backward flow ratio was the strongest differentiator of PAH from CTEPH. 4D flow has a potential to visualize different pulmonary arterial hemodynamics according to etiologies in pulmonary hypertension.

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