A medical emergency with absent or inadequate contraction of the left ventricle of the heart that immediately causes bodywide circulatory failure. The signs and symptoms include loss of consciousness; rapid shallow breathing progressing to apnea (absence of breathing); profoundly low blood pressure (hypotension) with no pulses that can be felt over major arteries; and no heart sounds.
Cardiac arrest is one of the greatest of all medical emergencies. Within several minutes, there is lack of oxygen (tissue hypoxia), leading to multiple organ injury. Unless cardiac arrest is quickly corrected, it is fatal.
The most common causes of cardiac arrest are electrical problems in the heart with ventricular fibrillation representing the major type. In ventricular fibrillation, there is loss of coordinated ventricular contractions leading to immediate loss of effective output of blood by the heart, resulting in circulatory arrest.
- Sudden Infant Death Syndrome (SIDS)
The sudden and unexpected death of a baby with no known illness, typically affecting sleeping infants between the ages of two weeks to six months. Infants with a brother or sister who died of SIDS; babies whose mothers used heroin, methadone, or cocaine during pregnancy; infants born weighing less than 4.4 pounds; children with an […]
- Sudoriferous gland
The sudoriferous (sweat) glands are small tubular structures situated within and under the skin (in the subcutaneous tissue). They discharge sweat by tiny openings in the surface of the skin. The sweat is a transparent colorless acidic fluid with a peculiar odor. It contains some fatty acids and mineral matter. It is also called perspiration.
- Sugar Busters diet
The Sugar Busters diet is a weight loss plan based upon restriction of sugar intake. The diet is based upon the concept that sugar consumption leads to insulin release, which some experts believe leads to weight gain. Sugar and other complex carbohydrates such as pasta, white bread, and white rice are forbidden on the sugar […]
Pertaining to suicide. the taking of ones own life. As in a suicidal gesture, suicidal thought, or suicidal act. An “online lifeline for suicidal undergrads” may help prevent college students from committing suicide.
The process of purposely ending one’s own life.