Cum se calculează Cardiac Output
Ce este Cardiac Output?
Cardiac output is the volume of blood pumped per minute. It's calculated from heart rate and stroke volume, crucial for shock assessment.
Formulă
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
Ghid pas cu pas
- 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
Exemple rezolvate
Intrare
HR 100, SV 50 mL
Rezultat
CO = 5 L/min (normal)
Normal cardiac output
Greșeli frecvente de evitat
- ✕Confusing cardiac output with blood pressure
- ✕Using SV values from different populations without BSA normalization
Întrebări frecvente
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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