Hemorrhage and Shock
Terms
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- Hemorrhage
- An abnormal internal or external discharge of blood.
- Homeostasis
- The natural tendency of the body to maintain a steady and and internal environment.
- Shock
- A state of inadequate tissue perfusion.
- Key Point
- Hemorrhage is the most common cause of shock and death in trauma patients.
- Parasympathetic Nervous System
- Division of the autonomic nervous system that is responsible for controlling vegatative functions.
- Sympathetic Nervous System
- Division of the autonomic nervous system that prepares the body for stressful situations.
- Stroke Volume
- The amount of blood ejected by the heart in one cardiac contraction.
- Preload
- The pressure within the ventricles at the end of diastole; the volume of blood delivered to the atria prior to ventricular diastole.
- Ventricular Filling
- The forcing of blood into the ventricle by the contraction of the atrium.
- Frank-Starling Mechanism
- Process by which an increase in cardiac output occurs in proportion to the diastolic stretch of the heart muscle fibers.
- Afterload
- The resistance a contraction of the hear