Vascular resistance
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Vascular resistance is the resistance that must be overcome for blood to flow through the circulatory system. The resistance offered by the systemic circulation is known as the systemic vascular resis
Vasoconstriction increases resistance, whereas vasodilation decreases resistance.
Blood pressure
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Blood pressure is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood through the circulatory system. When used without qua
Vascular resistance
…and arterioles) increases resistance, whereas vasodilation (increase in diameter) decreases resistance. Blood flow and cardiac output are related to blood pressure and inversely related to vascular resistance. The measurement of vascular resistance is challenging in most situations. The standard method is by the…
A healthcare worker measuring blood pressure using a sphygmomanometer.
A digital sphygmomanometer used for measuring blood pressure
Blood flow velocity waveforms in the central retinal artery (red) and vein (blue), measured by laser Doppler imaging in the eye fundus of a healthy volunteer.
Schematic of pressures in the circulation