What is the normal range for systemic vascular resistance (SVR)?

The normal range for systemic vascular resistance (SVR) is indeed between 800 and 1200 dynes/sec/cm5. SVR is a critical physiological parameter that reflects the total resistance that the systemic circulation offers to blood flow. It is calculated using the difference between arterial and venous pressure while considering cardiac output.

A normal SVR indicates appropriate vascular tone and resistance, which are essential for maintaining adequate blood pressure and tissue perfusion. Values lower than the normal range may suggest vasodilation or decreased resistance (potentially in states of sepsis or shock), while higher values could indicate vasoconstriction or increased resistance (as seen in conditions such as hypertension).

Understanding these values is important for the management of critically ill patients, as they can guide therapeutic interventions aimed at optimizing hemodynamics. The significance of maintaining SVR within the normal range cannot be overstated, as it plays a key role in ensuring that the organs receive sufficient blood flow to meet their metabolic needs.