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Sudden Cardiac Death
Sudden Cardiac Death A sudden, unexpected death caused by loss of heart function. Most sudden cardiac deaths are caused by arrhythmias, such as ventricular fibrillation.
RELATED TERMS--------------------------------------
Death 1. The end of life. The cessation of life. (These common definitions of death ultimately depend upon the definition of life, upon which there is no consensus.) 2. The permanent cessation of all vital bodily functions. (This definition depends upon the definition of "vital bodily functions.") See: Vital bodily functions. 3. The common law standard for determining death is the cessation of all vital functions, traditionally demonstrated by "an absence of spontaneous respiratory and cardiac functions." 4. The uniform determination of death.
Heart The hollow, muscular organ responsible for pumping blood through the circulatory system.
Cardiac Pertaining to the heart.
Fibrillation Rapid contractions of the heart muscles.
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Sudden death Death that occurs unexpectedly or immediately after onset of symptoms.
Sudden infant death syndrome The death, with no clear cause, of an infant between 1 and 12 months old. Putting an infant to sleep on her back has been shown to reduce the risk of SIDS.
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Sternum (breastbone) Bone in chest separated during open heart surgery.
Stress Test See exercise stress test
Stroke (also called cerebral vascular accident or CVA) Impaired artery blood flow to the brain. During a stroke, brain cells in the affected area are starved for oxygen and subsequently die.
Stunned Myocardium If blood flow is returned to an area of heart muscle after a period of ischemia (lack of blood supply), the heart muscle may not pump normally for a period of days following the event. This is called "stunned" heart muscle or myocardium.
Subvalvular Aortic Stenosis Subvalvular aortic stenosis is a narrowing of the flow of blood below the aortic valve in the left ventricle. It is usually caused by a membrane or thickening in the muscle in this area.
Sudden Cardiac Death
Superficial Thrombophlebitis A clot in a superficial vein, just under the skin.
Survival Rates Survival rates indicate the percentage of patients or grafts (transplanted organs) that are still alive functioning at a certain point posttransplant. Survival rates are often given at one-, three-, and five-year increments. Policy modifications are never made without examining their impact on transplant survival rates. Survival rates improve with technological and scientific advancements. Developing policies that reflect and respond to these advances in transplantation will also improve survival rates.
Systemic Circulation The circulation of blood from the left ventricle, through an extensive network of vessels that penetrate every part of the body, to the right side of the heart.
Systolic Pressure The pressure of the blood in the arteries when the heart pumps. It is the higher of two blood pressure measurements, e.g., 120/80, where 120 is the systolic pressure.
Spanish doctor A doctor who, being or not a citizen of that country, has been admitted to practice medicine in Spain.
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