関連ワード:  aortic valve velocity normal range    aortic valve velocity normal range in cm/sec    aortic valve peak velocity normal range    aortic valve peak velocity normal range cm s    aortic valve mean velocity normal range    aortic valve maximum velocity normal range    aortic valve velocity ratio vti normal range    aortic valve velocity time integral normal range    aortic valve area peak velocity normal range    aortic valve velocity ratio peak velocity normal range