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Abstract #1988

Turbulent Kinetic energy assessment of HOCM by using Multi-VENC 4D Flow MRI

Kotomi Iwata1, Tetsuro Sekine1, Masaki Tachi1, Yoichi Imori2, Junya Matsuda2, Yasuo Amano3, Makoto Obara4, Masahi Ogawa1, Hitoshi Takano2, and Shinichiro Kumita1

1Radiology, 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 clarify the relationship between TKE derived from 4D Flow MRI and LVOT gradient measured by US in the patients with HOCM. We recruited 3 volunteers, and 10 patients who were diagnosed as HOCM by cardiac ultrasound examination. The TKEsum and TKEpeak of HOCM group were higher than those of volunteers (107.0±25.0mJ vs. 39.2±8.7mJ, p=0.025; 15.5±3.8mJ vs. 4.1±0.6mJ, p=0.025). There was no significant correlation between each two TKE value and LOVT gradient (p=0.203, p=0.556, respectively). The TKE can clearly reveal the flow characteristics of HOCM and may provide different value form established US measurement.

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