Professional
Technical
IVT
SVR
Also written as: SVR — Systemic Vascular Resistance
Measurement of resistance to blood flow in the systemic circulation, calculated from hemodynamic parameters.
Full Definition
Systemic vascular resistance represents the total resistance that blood encounters as it flows through the systemic circulation. In cardiovascular anesthesia, SVR is calculated using the formula: (MAP - CVP) / CO × 80, where MAP is mean arterial pressure, CVP is central venous pressure, and CO is cardiac output. SVR monitoring helps guide vasoactive drug therapy and assess the patient's hemodynamic status during and after cardiac surgery.
Usage
Usage note: Include units (dynes·sec·cm⁻⁵) when documenting specific values.
In Context
- "The patient's SVR remained elevated at 2400 dynes despite vasodilator therapy." — Hemodynamic assessment
- "Low SVR following cardiopulmonary bypass required norepinephrine infusion." — Post-bypass management note
Also known as
systemic resistance
peripheral resistance
Don't confuse with
PVR (pulmonary vascular resistance)
TPR (total peripheral resistance)