Cardiology

Systemic Vascular Resistance (SVR)

Calculates left ventricular afterload / vascular resistance.

Parameters

mmHg
mmHg
L/min

Systemic Vascular Resistance (SVR) Result

--
FormulaSVR = [(MAP - CVP) / Cardiac Output] × 80

Clinical Pearls

Distinguishes between vasodilatory (distributive) shock and vasoconstrictive (cardiogenic/hypovolemic) states, dictating the choice between inotropes, vasopressors, and vasodilators.

Limitations

Assumes continuous laminar flow; calculation is an approximation derived from Ohm’s law applied to the circulation.