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How to evaluate the severity of aortic stenosis: discrepancy between valve area and pressure gradient
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- HAYASHIDA Akihiro
- Division of Cardiology, Kawasaki Medical School
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- TAMADA Tomoko
- Division of Cardiology, Kawasaki Medical School
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- OBASE Kikuko
- Division of Cardiology, Kawasaki Medical School
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- OKURA Hiroyuki
- Division of Cardiology, Kawasaki Medical School
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- YOSHIDA Kiyoshi
- Division of Cardiology, Kawasaki Medical School
Bibliographic Information
- Other Title
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- 大動脈弁狭窄症の重症度評価 ‐弁口面積と圧較差がくい違ったら?‐
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Description
Management of patients with aortic stenosis (AS) relies on accurate assessment of symptoms, AS severity, and left ventricular ejection fraction (LVEF). AS severity is best described by the measurements of maximum velocity, mean gradient, and valve area. In clinical practice, some patients have an apparent discrepancy in stenosis severity between those defined above. The continuous wave beam parallel to the stenotic jet should be taken using the best of multiple windows to avoid measurement error. Loading conditions influence velocity and pressure gradients; therefore, these parameters vary depending on cardiac output. Hence, no single calculated number should be relied on for final judgment. Evaluation of AS based on data obtained from echocardiography will play a more and more important role in the grading of AS.
Journal
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- Choonpa Igaku
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Choonpa Igaku 40 (5), 473-483, 2013
The Japan Society of Ultrasonics in Medicine
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Keywords
Details 詳細情報について
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- CRID
- 1390282680176390656
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- NII Article ID
- 10031195613
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- NII Book ID
- AA11889584
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- ISSN
- 18819311
- 13461176
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed