Hypoxic-ischaemic encephalopathy Health Dictionary

Hypoxic-ischaemic Encephalopathy: From 1 Different Sources


(HIE, birth asphyxia, perinatal asphyxia) brain damage in a newborn infant as a result of the brain receiving inadequate oxygen. HIE may cause seizures and, if severe, death within minutes of oxygen deprivation. If the infant survives there can be significant long-term consequences, such as developmental delay, learning disabilities, or cerebral palsy.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Encephalopathy

Any degenerative brain disease... encephalopathy

Bovine Spongiform Encephalopathy

BOVINE SPONGIFORM ENCEPHALOPATHY (BSE)

Scrapie. Notifiable disease. Fatal disease in the nervous system of cattle, unknown before 1985. Microscopic holes appear in the brain giving a spongiform appearance, but with little inflammation. Can spread from one animal to another: sheep, goats, deer, mules, mink, hamsters, mice, pigs and monkeys. Cause: not a virus. Animals itch and scrape themselves against trees or posts for relief. May spread from animals to humans, with brain infection after the character of polio.

Symptoms. (Human). Speech impairment, short-term-memory-loss, difficulty in controlling body movements. Zinc deficiency.

Treatment. Hospitalisation.

Suggested treatment for human infection, unproven.

Tinctures. Echinacea 5; Black Cohosh 3; Yarrow 2; Senna leaf 1.2-3 teaspoons in water (or cup hot Yarrow tea) 3-4 times daily. For headache: Gelsemium.

Supplement: Zinc.

To be treated by a general medical practitioner or hospital specialist. ... bovine spongiform encephalopathy

Hepatic Encephalopathy

A neuropsychiatric syndrome caused by disease of the LIVER, and occurring most often in patients with CIRRHOSIS – see also LIVER, DISEASES OF; it also occurs in acute form in acute failure of liver function. The disorder is believed to be the result of biochemical disturbance of brain function, because the condition is reversible and pathological changes in brain tissue are rarely found. The patient’s intellect, personality, emotions and consciousness are altered but neurological signs may or may not be identi?ed. Apathy, confusion, drowsiness, sometimes CONVULSIONS, speech disturbance and eventually COMA mark the progress of the condition. The principles of treatment are to remove the precipitating causes. These include: URAEMIA; sedative, antidepressant and hypnotic drugs; gastrointestinal bleeding; too much protein in the diet; infection; and trauma (including surgical operations).... hepatic encephalopathy

Spongiform Encephalopathy

A disease of the neurological system caused by a PRION. Spongy degeneration of the BRAIN occurs with progressive DEMENTIA. Known examples of the disorder in humans are CREUTZFELDT-JAKOB DISEASE (CJD) and KURU. Among animals, scrapie in sheep and BOVINE SPONGIFORM ENCEPHALOPATHY (BSE) are caused by slow viruses. The latter has occurred as an outbreak in cattle over the past decade or so, probably as a result of cattle being fed processed o?al from infected animals. Some people have developed a form of CJD from eating infected beef.... spongiform encephalopathy

Transient Ischaemic Attack

(TIA) A brief interruption of the blood supply to part of the brain, which causes temporary impairment of vision, speech, sensation, or movement. The episode typically lasts for several minutes or, at the most, for a few hours. TIAs are sometimes described as mini strokes, and they can be the prelude to a stroke.

TIAs may be caused by a blood clot (see embolism) temporarily blocking an artery that supplies the brain, or by narrowing of an artery as a result of atherosclerosis.

After a TIA, tests such as CT scanning, blood tests, ultrasound scanning, or angiography may be needed to determine a cause. In some cases, the heart is studied as a possible source of blood clots. Treatment is aimed at preventing stroke, which occurs within 5 years in up to one third of patients with TIA. Treatments include endarterectomy, anticoagulant drugs, or aspirin.... transient ischaemic attack

Wernicke’s Encephalopathy

See Wernicke–Korsakoff syndrome.... wernicke’s encephalopathy

Encephalopathy (bse)

Known colloquially as ‘mad cow disease’, this is a fatal and untreatable disease. Along with scrapie in sheep and CREUTZFELDT-JACOB DISEASE (CJD) in humans, BSE belongs to a class of unusual degenerative diseases of the brain known as transmissible spongiform encephalopathies. The disease is caused by abnormal PRION proteins, which are resistant to cellular degradation. These abnormal prion proteins accumulate in and eventually cause the death of nerve cells, both in the spinal cord and the brain. The rare human disease CJD occurs throughout the world and is of three types: sporadic, iatrogenic (see IATROGENIC DISEASE) and inherited.

Since the BSE epidemic in cattle developed in the UK in the 1980s, however, a new variant of CJD has been identi?ed and is believed to be the result of consumption of the meat of BSE-infected cattle. Studies in transgenic mice have con?rmed that BSE caused variant CJD. The new variant has affected younger people and may have a shorter incubation period. If this incubation period turns out to be the same as for the other types of CJD, however, it could be 2005– 2010 before the peak of this outbreak is reached. Over 148 people had died, or were dying, from variant CJD in the UK by the year 2005.

The appearance of BSE in cattle is believed to have been caused by a gene mutation (see GENETIC DISORDERS), although whether this mutation ?rst occurred in cattle or in some other animal remains uncertain. Although the ?rst case of BSE was o?cially reported in 1985, the ?rst cattle are thought to have been infected in the 1970s. BSE spread to epidemic proportions because cattle were fed meat and bone meal, made from the o?al of cattle suffering from or incubating the disease. Mother-to-calf transfer is another likely route of transmission, although meat and bone meal in cattle feed were the main cause of the epidemic. The epidemic reached its peak in 1992 when the incidence of newly diagnosed cases in cattle was 37,545.

A two-year UK government inquiry into the BSE epidemic concluded that BSE had caused a ‘harrowing fatal disease in humans’, and criticised o?cials for misleading the public over the risk to humans from BSE. Consequently, a compensation package for patients and relatives was made available. Meanwhile, a ban on the export of UK beef and restrictions on the type of meat and products made from beef that can be sold to the public were put in place. Although initially thought to be a problem primarily con?ned to the UK, several other countries – notably France, Germany, Spain, Switzerland and the United States – have also discovered BSE in their cattle.... encephalopathy (bse)

Hypertensive Encephalopathy

A complication of severe HYPERTENSION, this serious but uncommon condition is characterised by neurological symptoms which include transient verbal and visual disturbances, PARAESTHESIA, disorientation, ?ts and sometimes loss of consciousness. It also affects the eyes, causing PAPILLOEDEMA. Haemorrhages may occur in the brain, usually in the area of the BASAL GANGLIA. Neurological symptoms can usually be treated e?ectively by controlling the patient’s hypertension.... hypertensive encephalopathy

Ischaemic Heart Disease

See HEART, DISEASES OF.... ischaemic heart disease

Ischaemic Stroke

A STROKE that occurs when the ?ow of blood to a part of the brain is interrupted by a partial or complete THROMBOSIS of the supplying artery or ARTERIES, or by a clot of blood that has detached itself from elsewhere in the circulatory system – for instance, a deep vein thrombosis (DVT) – and blocked a cerebral artery. Stroke is the second most common cause of death worldwide. Its treatment is di?cult and prevention is best targeted at those who are at the highest absolute risk of stroke, because such people are likely to derive the greatest bene?t. They generally have a history of occlusive vascular diseases such as previous ischaemic stroke or a transient ischaemic attack (TIA), coronary heart disease (see HEART, DISEASES OF) or PERIPHERAL VASCULAR DISEASE. In the UK strokes affect about 200 people per 100,000 population annually, with the incidence rising sharply after the age of 55. At the age of 70 the incidence is around 15 people per 1,000 of population; at 80 the ?gure is double that.

About 80 per cent of patients survive an acute stroke and they are at risk of a further episode within a few weeks and months; about 10 per cent in the ?rst year and 5 per cent a year after that. HYPERTENSION, smoking, HYPERLIPIDAEMIA and raised concentration of blood sugar, along with OBESITY, are signi?cant pointers to further strokes and preventive steps to reduce these factors are worthwhile, although the reduction in risk is hard to assess. Even so, the affected person should stop smoking, greatly reduce alcohol intake, check for and have treated diabetes, reduce weight and exercise regularly. In any case, a diet rich in fresh fruit and vegetables and low in fat and salt, exercise and the avoidance of smoking may reduce the risk of having a ?rst stroke.

The evidence is inconclusive that patients with ischaemic stroke should be treated with antihypertensives. Furthermore, neither the starting blood pressure nor the best drug regimen or its starting time are generally agreed. Studies on the most e?ective methods of preventing and treating stroke are continuing; meanwhile available evidence suggests that an active approach to prevention of primary and secondary hypertension will bene?t patients and usually be cost-e?ective.... ischaemic stroke

Transient Ischaemic Attacks Or Episodes (tia, Tie)

Episodes of transient ISCHAEMIA of some part of the cerebral hemispheres or the brain stem (see BRAIN) lasting anything from a few minutes to several hours and followed by complete recovery. By de?nition, the ischaemic episode must be less than 24 hours. These episodes may be isolated or they may occur several times in a day. The cause is ATHEROMA of the carotid or vertebral arteries (see ARTERIES, DISEASES OF) and the embolisation (see EMBOLISM) of PLATELETS or CHOLESTEROL. These attacks present with strokes (see STROKE) that rapidly recover.... transient ischaemic attacks or episodes (tia, tie)

Wernicke’s Encephalopathy

Also called the Wernicke-Korsako? syndrome, this uncommon disorder is characterised by mental confusion or DELIRIUM that occurs in combination with an unsteady GAIT, nystagmus (see under EYE, DISORDERS OF), and paralysis of the eye muscles and eventually PSYCHOSIS. It is caused by a de?ciency of vitamin B1 (THIAMINE

– see APPENDIX 5: VITAMINS) which affects the brain and nervous system. It occurs in alcoholic individuals and in patients with persistent vomiting. As soon as the condition is diagnosed, it must be treated with large doses of thiamine. Unless the patient has developed symptoms of psychosis, the condition is usually reversible with treatment.... wernicke’s encephalopathy

Heart Disease, Ischaemic

The most common form of heart disease, in which narrowing or obstruction of the coronary arteries, usually by atherosclerosis, results in a reduced blood supply (see coronary artery disease).... heart disease, ischaemic



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