這是什麼
Cardiac index is cardiac output divided by body surface area.[1]
為什麼重要
The same cardiac output can mean different things in a small or large body, so cardiac index puts pump flow on a body-size-adjusted scale.[1,2]
發生異常的根本原因
- Normalization relation: Cardiac index rises when cardiac output is high for body surface area and falls when pump flow is low relative to body size.[1]
- Typical scale: A healthy adult example is often near 3 L/min/m² at rest, but clinical interpretation depends on method, body surface area, and illness context.[2,1]
它會影響哪些判斷
- It links cardiac output, body size, perfusion, shock context, and heart-failure assessment.[1]
解讀陷阱
- Cardiac index is not a consumer-facing screening value and should not be inferred from wearable data alone.[1]