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Cardiac output is the volume of blood pumped per minute. It's calculated from heart rate and stroke volume, crucial for shock assessment.
Fórmula
Calculate: CO = HR × SV (in mL)
- CO
- CO/BSA — CO/BSA
- HR
- HR value — Variable used in the calculation
- SV
- SV value — Variable used in the calculation
Guía paso a paso
- 1Calculate: CO = HR × SV (in mL)
- 2Normal CO ≈ 5 L/min; normalize to body surface area: CI = CO/BSA
- 3Normal CI ≈ 2.5-3.5 L/min/m²
Ejemplos resueltos
Entrada
HR 100, SV 50 mL
Resultado
CO = 5 L/min (normal)
Normal cardiac output
Errores comunes a evitar
- ✕Confusing cardiac output with blood pressure
- ✕Using SV values from different populations without BSA normalization
Preguntas frecuentes
What decreases cardiac output?
Decreased heart rate, decreased stroke volume (due to reduced preload, afterload, or contractility).
How is stroke volume measured?
Echocardiography, cardiac catheterization, or non-invasive methods. Not directly measured from vital signs.
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