BioConst 生物常量

研究・一般情報としての参考です。BioConst は内容を継続的に修正しますが、誤りを含む可能性があります。診断、投薬、検査、治療の判断は医師の指導に従ってください。

医学 Wiki

Myocardial contractility

How strongly cardiac muscle contracts for a given filling state.

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これは何か

Myocardial contractility describes how strongly the heart muscle contracts for a given filling state.[1,2]

なぜ重要か

Contractility changes how much blood the ventricle ejects from the blood it has already received.[1]

異常値が生じる根本原因

  • Squeeze relation: Stronger myocardial contraction ejects more blood from the same filling volume; weaker contraction leaves more blood behind and lowers stroke volume and cardiac output.[1,2]

どの判断に影響するか

  • It links myocardial function, stroke volume, cardiac output, perfusion, and heart-failure context.[1]

解釈上の注意

  • Contractility cannot be judged from how strong a pulse feels without clinical context.[1]

関連疾患