enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Vascular resistance - Wikipedia

    en.wikipedia.org/wiki/Vascular_resistance

    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 resistance or may sometimes be called by another term total peripheral resistance, while the resistance caused by the pulmonary circulation is known as the pulmonary vascular resistance.

  3. Vasodilation - Wikipedia

    en.wikipedia.org/wiki/Vasodilation

    Vascular resistance is the amount of force circulating blood must overcome in order to allow perfusion of body tissues. Narrow vessels create more vascular resistance, while dilated vessels decrease vascular resistance. Vasodilation acts to increase cardiac output by decreasing afterload, −one of the four determinants of cardiac output. [4]

  4. Vasoconstriction - Wikipedia

    en.wikipedia.org/wiki/Vasoconstriction

    The process is the opposite of vasodilation, the widening of blood vessels. The process is particularly important in controlling hemorrhage and reducing acute blood loss. When blood vessels constrict, the flow of blood is restricted or decreased, thus retaining body heat or increasing vascular resistance.

  5. Vasodilatory shock - Wikipedia

    en.wikipedia.org/wiki/Vasodilatory_shock

    When the blood vessels suddenly relax, it results in vasodilation. In vasodilatory shock, the blood vessels are too relaxed leading to extreme vasodilation and blood pressure drops and blood flow becomes very low. Without enough blood pressure, blood and oxygen will not be pushed to reach the body's organs.

  6. Hemodynamics - Wikipedia

    en.wikipedia.org/wiki/Hemodynamics

    The pressure drop of the arterioles is the product of flow rate and resistance: ∆P=Q xresistance. The high resistance observed in the arterioles, which factor largely in the ∆P is a result of a smaller radius of about 30 μm. [24] The smaller the radius of a tube, the larger the resistance to fluid flow.

  7. Hyperdynamic circulation - Wikipedia

    en.wikipedia.org/wiki/Hyperdynamic_circulation

    Hyperdynamic circulation is abnormally increased circulatory volume. Systemic vasodilation and the associated decrease in peripheral vascular resistance results in decreased pulmonary capillary wedge pressure and decreased blood pressure, presenting usually with a collapsing pulse, but sometimes a bounding pulse.

  8. Compliance (physiology) - Wikipedia

    en.wikipedia.org/wiki/Compliance_(physiology)

    Vasodilation and vasoconstriction are complex phenomena; they are functions not merely of the fluid mechanics of pressure and tissue elasticity but also of active homeostatic regulation with hormones and cell signaling, in which the body produces endogenous vasodilators and vasoconstrictors to modify its vessels' compliance.

  9. Distributive shock - Wikipedia

    en.wikipedia.org/wiki/Distributive_shock

    Control of inflammation, vascular function and coagulation to correct pathological differences in blood flow and microvascular shunting has been pointed to as a potentially important adjunct goal in the treatment of distributive shock. [2] People with septic shock are treated with antimicrobial drugs to treat the causative infection. [12]