What is Systemic Vascular Resistance?
Systemic Vascular Resistance is the resistance offered by the systemic circulation. A decrease in SVR will result in an increased blood flow to tissues and an increased venous flow back to the heart. An increased SVR will decrease blood flow to tissues and decrease venous flow back to the heart.
How To Calculate Systemic Vascular Resistance – SVR
Systemic Vascular Resistance (SVR) calculation = 80 x (MAP – CVP)/CO. SVR can be calculated if cardiac output (CO), mean arterial pressure (MAP), and central venous pressure (CVP) are known.
|Mean Artery Pressure(MAP):|
|Central Venous Pressure (CVP):|
|Cardiac Output (CO):||L/Min|
|Systemic Vascular Resistance (SVR):||dyn·s/cm-5|
Normal SVR = 800 – 1600 dynes•sec•cm-5