Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 94

 Is the pressure or resistance against which the ventricle must pump in order to eject blood.

 Although aortic impedance is the most accurate measurement, arterial BP is the most commonly used index of afterload. (see section on BP for more information.)Aortic impedance = Aortic pressure/Aortic flow.

 End‐systolic ventricular wall stress is also used to describe afterload.At the end of systole, with the aortic valve open, increased resistance in the vascular system will be imposed on the ventricles and will increase ventricular wall stress.

 Anesthetic drugs that can affect afterload include acepromazine (vasodilation decreases afterload) and alpha2 agonists (vasoconstriction increases afterload).