The Cardiovascular
ToolsCalculators

Systemic and pulmonary vascular resistance

SVR and PVR from pressures and cardiac output.

Systemic and pulmonary vascular resistance
Mean arterial pressure
mmHg
Right atrial pressure (CVP)
mmHg
Mean pulmonary artery pressure (optional)
mmHg
PA wedge pressure (optional)
mmHg
Cardiac output
L/min
Complete the fields above to see the result.

When to use

  • Interpreting right-heart catheterisation data, classifying shock, and assessing pulmonary hypertension.

Formula

SVR = 80 × (MAP − RAP) / CO [dyn·s·cm⁻⁵]. PVR = (mPAP − PCWP) / CO [Wood units]; multiply by 80 for dyn·s·cm⁻⁵.

Pearls and pitfalls

  • The 2022 ESC/ERS definition of pulmonary hypertension uses mPAP >20 mmHg, with pre-capillary disease requiring PCWP ≤15 mmHg and PVR >2 Wood units.

References

  1. Humbert M, et al. 2022 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension. Eur Heart J. 2022;43(38):3618–3731.