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Compute SVR = 80 × (MAP − CVP) / CO (dyn·s/cm⁵). Normal 800–1440; high in cardiogenic shock and hypertension; low in distributive shock and vasodilators. Derived from Grossman 1991, StatPearls, LITFL, Vincent NEJM 2013, Braunwald. Not medical advice.
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Tool usage guide
The Systemic Vascular Resistance Calculator computes SVR from mean arterial pressure (MAP), central venous pressure (CVP), and cardiac output (CO): SVR = 80 × (MAP − CVP) / CO, reported in dyn·s/cm⁵. Use the result as a hemodynamic reference, not as medical advice.
Background
A patient has a MAP of 93 mmHg, CVP of 8 mmHg, and cardiac output of 5 L/min.
Problem
Calculate SVR and determine whether it falls within the stated normal range.
How to use
Enter MAP 93, CVP 8, and CO 5, then set Decimal Places to 0.
MAP: 93 mmHg; CVP: 8 mmHg; CO: 5 L/min; Decimal Places: 0Outcome
The calculator returns SVR = 1360 dyn·s/cm⁵ and categorizes it as Normal SVR.
Background
A hemodynamic profile shows MAP 70 mmHg, CVP 12 mmHg, and cardiac output 2.5 L/min.
Problem
Quantify resistance and interpret the result alongside the low cardiac output.
How to use
Enter MAP 70, CVP 12, and CO 2.5, then set Decimal Places to 0.
MAP: 70 mmHg; CVP: 12 mmHg; CO: 2.5 L/min; Decimal Places: 0SVR = 80 × (MAP − CVP) / CO, reported in dyn·s/cm⁵.
It requires MAP in mmHg, CVP in mmHg, and cardiac output in L/min.
The stated normal range is 800–1440 dyn·s/cm⁵.
MAP can be estimated as DBP + (SBP − DBP) / 3, according to the input guidance.
No. It provides a calculation for reference and does not replace clinical assessment.
Outcome
The calculator returns SVR = 1856 dyn·s/cm⁵, categorized as High SVR. The value should be interpreted with cardiac output and the clinical context.