Understanding Vascular Resistance (TPR)
Total Peripheral Resistance (TPR) is the sum of the resistance of all peripheral vasculatur in the systemic circulation. This should not be confused with Pulmonary Vascular Resistance, which is the resistance in the pulmonary circulation. Vascular resistance is a term used to define the resistance to flow that must be overcome to push blood through the circulatory system. The resistance offered by the peripheral circulation is known as the systemic vascular resistance (SVR), while the resistance offered by the vasculature of the lungs is known as the pulmonary vascular resistance (PVR). The systemic vascular resistance may also be referred to as the total peripheral resistance. Vasoconstriction (i.e., decrease in blood vessel diameter) increases SVR, whereas vasodilation (increase in diameter) decreases SVR. Normal Range (0.327 - 0.937) Levels : If the vascular resistance readings are high, indicates a risk for strokes, heart attacks, heart failure and renal failure. I