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Astraphobia
Astraphobia An abnormal and persistent fear of thunderstorms. Sufferers experience anxiety even when they realize the risk of harm is very small. Consequently, when indoors they might seek shelter under a bed, in a closet or in a basement. They generally keep a watchful eye on the sky and remain alert for reports of electrical storms.
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Abnormal
Not normal. Deviating from the usual structure, position, condition, or behavior. In referring to a growth, abnormal may mean that it is cancerous or premalignant (likely to become cancer).
Anxiety
A psychological and/or biological response to stress. Feelings of anxiety involve discomforting apprehension or concern, which may include symptoms such as cognitive difficulties, hypersensitivity, dizziness, muscular weakness, breathing difficulties, irregular heart beat, sweating, and sensations of fear. Typically, anxiety is a natural and healthy response to life experiences. However, exaggerated or chronic anxiety often indicates an anxiety disorder. Anxiety can be produced by external stress (exogenous anxiety) or internal stress (endogenous anxiety).
Risk
In clinical trials, the probability of harm or discomfort for subjects, arising from the test product. Acceptable risk differs depending on the condition for which a product is being tested. A product for sore throat, for example, will be expected to have a low incidence of side effects. However, unpleasant side effects may be an acceptable risk when testing a promising treatment for a life-threatening illness.
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Astrakhan doctors
All doctors near Astrakhan, Russia. Doctors who can assist a patient in Astrakhan.
Astramorph pf
Astramorph pf is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): morphine sulfate.
Astrocytoma
A nervous system tumor that grows from astrocytes (astrocytomas are a type of glial cell, glial cells are the supporting cells of the nervous system). They can occur in children and young adults and sometimes in older people. Astrocytomas can sometimes become large before causing symptoms. A diagnosis is made either after surgical resection or with a guided (stereotactic) biopsy. Treatment can consist of surgical excision, radiation therapy or chemotherapy. Some patients with minimal symptoms may be observed with serial imaging studies.
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Asthenic
1. Weak. Lacking in strength. 2. Having a slender light body. Ectomorphic. See also: Lambert-Eaton myasthenic syndrome .
Asthma susceptibility gene
One of the genes that predisposes a person to asthma. A new gene family that plays a major role in asthma susceptibility has been identified. This gene family located at chromosome 5q23-35 is called Tim or Tapr. It controls the development of airway hyperreactivity (and the T cell production of interleukin 4 and 13). TIM-1 is also the receptor of the hepatitis A virus. This may explain the fact that hepatitis A virus infection decreases the chance asthma will develop.
Asthma, exercise-induced
"Asthma that is ""triggered"" by vigorous physical activity. Exercise-induced asthma tends particularly to affect children and young adults (because of their high level of physical activity) but can occur at any age. Exercise-induced asthma is initiated by the process of respiratory heat exchange (the fall in airway temperature during rapid breathing followed by rapid reheating with lowered ventilation). The more heat transferred, the cooler the airways become, the more rapidly they rewarm, and the more the bronchi are narrowed. Exercise-induced asthma is common. People with chronic asthma can develop symptoms whenever they are exposed to a ""trigger"" of the asthma, such as a virus, pollen, dust, or cigarette smoke. About 80 to 90 percent of people who have chronic asthma have exercise-induced asthma. And about 35 to 40 percent of people with seasonal allergies also have exercise-induced asthma and symptoms worsen during the spring and fall. "
Asthmatic
1. Pertaining to asthma as, for example, asthmatic bronchitis. 2. A person with asthma.
Astigmatic
Referring to astigmatism or a person with astigmatism, a common form of visual impairment in which part of an image is blurred, due to an irregularity in the curvature of the front surface of the eye, the cornea. The curve of the cornea is shaped more like an American football or a rugby ball rather than a normal spherical basketball. Light rays entering the eye there are not uniformly focused on the retina. Rays entering through the more-curved surface are focused before the rays coming through the less-curved surface. The light is focused clearly along one plane but is blurred along the other. The result is blurred vision at all distances. Only part of what you are looking at is in clear focus at any one time.
Astraphobia
Asymptomatic infection
An infection without symptoms. Also known as inapparent or subclinical infection.
Asystole
A dire form of cardiac arrest in which the heart stops beating -- there is no systole -- and there is no electrical activity in the heart. The heart is at a total standstill. In the past the asystolic heart usually could not be restarted. However, in 2004 people with asystole were reported to be three times as likely to survive if they are given an a injection of a hormone called vasopressin than if they receive adrenaline alone.
AT (in DNA)
AT stands for adenine and thymine, a base pair in DNA. The other base pair in DNA is GC (guanine and cytosine).
Ataxia telangiectasia mutated
See: ATM.
Ataxia, cerebellar
See: Ataxia.
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