Last Updated
：2025/12/06
cardiothoracic ratio
Noun
Japanese Meaning
医学において、心胸比とは、胸部内径に対する心臓サイズの比率を指します。具体的には、右心側（midlineから右心縁までの最大垂直径）と左心側（midlineから左心縁までの最大垂直径）の合計を、右横隔膜レベルで計測される胸郭内径で割った値です。
（ plural ）
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(medicine) The ratio (MRD + MLD) / ID, where MRD is the greatest perpendicular diameter from midline to right heart border; MLD is the greatest perpendicular diameter from midline to left heart border; and ID is the internal diameter of the chest at the level of the right hemidiaphragm.
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cardiothoracic ratio
The cardiothoracic ratio measured on the chest radiograph increased from 0.48 to 0.56, indicating progressive cardiomegaly.
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The cardiothoracic ratio measured on the chest radiograph increased from 0.48 to 0.56, indicating progressive cardiomegaly.
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