| A | B |
|---|
| hazardous material (HAZ-MAT) | Substance that is potentially harmful or that presents an unreasonable risk for injury, health problems, or significant property damage if not properly controlled |
| HAZ-MAT team | Personnel specially trained to manage emergencies involving hazardous materials |
| head-tilt/chin-lift maneuver | The prefered method for opening and maintaining an airway in a patient without suspected neck injury |
| heart | Organ located in the thoracic cavity that receives blood from the veins and pumps it to the arteries |
| hematoma | Swelling or mass of blood caused by breaking of a blood vessel |
| hemoglobin | Protein in red blood cells responsible for oxygen transport |
| hemorrhagic shock | Hypoperfusion syndrome caused by excessive blood loss; a type of hypovolemic shock; the most common cause of shock in a trauma patient |
| high efficiency particulate air (HEPA) respirator | A specially filtered mask that is worn when caring for patients suspected or diagnosed with tuberculosis and other diseases caused by airborne pathogens |
| hinge joint | Joint that allows movement in one plane, forward and backward |
| hives | Raised, red blotches associated with allergic reactions |
| hormones | Biologically active substances secreted by an endocrine gland; travel through the bloodstream to exert an influence on distant organs or body tissues |
| humerus | The upper arm bone |
| hydrocephalus | Excessive fluid accumulation inside the brain |
| hyperextension | Extension of a joint beyond its normal limit during movement |
| hyperglycemia | Condition in which blood sugar is too high; results from inadequate insulin in the blood for glucose metabolism |
| hypertension | Abnormally high blood pressure |
| hyperthermia | Abnormally high core body temperature |
| hypoglycemia | Condition in which blood sugar is too low; results from too much insulin or not enough glucose in the blood |
| hypothermia | Abnormally low core body temperature |
| hypoperfusion | Shock; inadequate cardiac output causing a decrease in the delivery of oxygen and clearance of carbon dioxide |
| hypovolemic shock | Shock caused by inadequate circulatory colume; may be due to loss of blood or depletion of other body fluids |
| hypoxia | Deficiency of oxygen |
