Abstract #3455

4D Flow MRI assessment of hypertrophic cardiomyopathy –the comparison with pressure gradient measured by Doppler ultrasound-

Kotomi Iwata¹, Tetsuro Sekine¹, Masaki Tachi¹, Yoichi Imori², Minako Takeda¹, Yasuo Amano³, Makoto Obara⁴, Yoshio Matsumura¹, and Shin-ichiro Kumita¹

¹Radiolody, Nippon Medical School, Tokyo, Japan, ²Cardiology, Nippon Medical School, Tokyo, Japan, ³Radiology, Nihon University, Tokyo, Japan, ⁴Philips Electronics Japan Ltd., Tokyo, Japan

The purpose of this study was to compare the flow abnormality based on 4D Flow MRI data with the PG measured by Doppler ultrasound. we enrolled 9 patients who underwent echocardiography followed by 4D Flow MRI. Helical grade of HOCM group was higher than that of HNCM group (2.33±0.47 vs. 1.33±0.47, p=0.032). There was no significant difference between HG and each characteristic of HCM (PG, septal thickness, septum/free wall ratio and the presence of SAM). 4D Flow MRI can visualize abnormal helical flow of ascending aorta in patients with hypertrophic obstructive cardiomyopathy.

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