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Abstract #3452

Effect of gravity on inferior vena cava and abdominal aortic flow: evaluation using multi-posture MRI

Yoshisuke Kadoya1, Tosiaki Miyati1, Naoki Ohno1, Satoshi Kobayashi1, and Toshifumi Gabata1

1Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan

Inferior vena cava flow (IVCF) and abdominal aortic flow (AAF) are seems to be affected by gravity, ie., it depends on the body posture. We validated the effect of gravity on IVCF and AAF in supine and upright positions using an original multi-posture MRI. IVCF/AAF mean velocity, IVCF/AAF maximum velocity, mean IVCF/AAF, maximum IVCF/AAF in the upright position were significantly lower than those in the supine position. The cross-sectional area of IVC was significantly lower than those in the supine position, but that of AA was not significantly changed. Both IVCF and AAF decrease in the upright position.

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