Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 313

 Increases in intrathoracic pressure reduce venous return. This decreases right and left ventricular preload.Cardiac output decreases as a result.The effect on cardiac output is more pronounced in hypovolemic patients.

 Baroreceptors become activated, initiating a cascade of neurohormonal mechanisms to stimulate the kidney to decrease GFR and increase tubular reabsorption.

 Other mechanisms involved are:Release of ADH.Stimulation of the RAAS.Stimulation of the sympathetic nervous system.Inhibition of tonic vagal influences.

 This results in decreased urine volume, decreased renal plasma flow, and retention of sodium and water.