Cerebral AVMs may present in a number of ways

In unruptured brain AVMs, the risk of spontaneous hemorrhage may be as low as 1 % per year.

AVMs in certain critical locations may stop the circulation of the cerebrospinal fluid, causing accumulation of the fluid within the skull and giving rise to a clinical condition called hydrocephalus.

Based on this system, AVMs may be classified as grades 1-5.

The lungs normally " filter out " bacteria and blood clots from the bloodstream ; AVMs bypass the capillary network of the lungs and allow these to migrate to the brain, where bacteria may cause a brain abscess and blood clots may lead to stroke.

Bleeding from lung AVMs is relatively unusual, but may cause hemoptysis ( coughing up blood ) or hemothorax ( blood accumulating in the chest cavity ).

Large AVMs may lead to platypnea, difficulty in breathing more marked when sitting up compared to lying down ; this probably reflects changes in blood flow associated with positioning.

Very large AVMs cause a marked inability to absorb oxygen, which may be noted by cyanosis ( bluish discoloration of the lips and skin ), clubbing of the fingernails ( often encountered in chronically low oxygen levels ), and a humming noise over the affected part of the lung detectable by stethoscope.

AVMs can occur in various parts of the body:

Arteriovenous malformation ( AVM, larger vascular malformations ) occur in larger organs, predominantly the lungs ( 50 %), liver ( 30 – 70 %) and the brain ( 10 %), with a very small proportion (< 1 %) having AVMs in the spinal cord.

Although AVMs are often associated with the brain and spinal cord, they can develop in any part of the body.

Neurosurgeons have begun to utilize endovascular image guided procedures for the treatment of aneurysms, AVMs, carotid stenosis, strokes, and spinal malformations, and vasospasms.

* LaTeX package for drawing AVMs – includes documentation

Bob White pioneered embolization techniques for pulmonary AVMs.

In addition to cancer, it has also been shown to be beneficial for the treatment of some non-cancerous conditions, including functional disorders such as arteriovenous malformations ( AVMs ) and trigeminal neuralgia.

HPSG generates strings by combining signs, which are defined by their location within a type hierarchy and by their internal feature structure, represented by attribute value matrices ( AVMs ).

In any inquiry into the way in which great literature affects the emotions, particularly with respect to the sense of harmony, or relief of tension, or sense of `` a transformed inner nature '' which may occur, a most careful exploration of the particular feature of the experience which produces the effect would be required.

Exposure problems may occur in these forest areas where uneven lighting results from shafts of sunlight filtering through the overhead branches.

It seems likely, moreover, that with an increase in the rate of saving in mortgage lending institutions, interest rates on residential mortgages may move somewhat lower through the spring of next year, although the increased ease in residential mortgage lending may occur primarily in other terms than interest rate, e.g., easier downpayment and amortization terms.

Thus, while altruistic persons may under some circumstances be outcompeted by less altruistic persons at the individual level, according to group selection theory the opposite may occur at the group level where groups consisting of the more altruistic persons may outcompete groups consisting of the less altruistic persons.

In such a situation, it may be incumbent on the individual to abjure one of his citizenships to avoid possibly being forced into situations where countervailing duties are required of him, such as might occur in the event of war.

Abscesses may occur in any kind of solid tissue but most frequently on skin surface ( where they may be superficial pustules ( boils ) or deep skin abscesses ), in the lungs, brain, teeth, kidneys and tonsils.

Departures from the expected pattern may occur because of unidentified social or political situations or because of geographic barriers.

Transportation of abalone may only legally occur while the abalone is still attached in the shell.

They may similarly be produced in regions like the center of the Milky Way and other galaxies, where very energetic celestial events occur ( principally the interaction of relativistic jets with the interstellar medium ).

However, in the Coulomb field of a nucleus the translational invariance is broken and single-photon annihilation may occur.

Interactions between alcohol and certain antibacterials may occur and may cause side-effects and decreased effectiveness of antibacterial therapy.

Cross-resistance to several antibacterials may also occur when a resistance mechanism encoded by a single gene conveys resistance to more than one antibacterial compound.

This may occur several times, until gamonts are produced, forming gametes that fuse to create new cysts.

As audio signals may be electronically represented in either digital or analog format, signal processing may occur in either domain.

These antidepressants typically have fewer adverse effects than the tricyclics or the MAOIs, although such effects as drowsiness, dry mouth, nervousness, anxiety, insomnia, decreased appetite, long-term weight gain and decreased ability to function sexually may occur.

Adhesion, the attachment between adhesive and substrate may occur either by mechanical means, in which the adhesive works its way into small pores of the substrate, or by one of several chemical mechanisms.

When subjected to loading, debonding may occur at different locations in the adhesive joint.

Although aluminium has a low gastrointestinal absorption, accumulation may occur mainly in the presence of renal insufficiency.

There is a risk of a benzodiazepine withdrawal and rebound syndrome after continuous usage for longer than two weeks, and tolerance and dependence may occur if patients stay under this treatment for longer.

Patchen's musicians are outsiders in established jazz circles, and Patchen himself has remained outside the San Francisco poetry group, maintaining a self-imposed isolation, even though his conversion to poetry-and-jazz is not as extreme or as sudden as it may first appear.

The Kremlin's goal is the isolation and capture, not of Ghana, but of the United States -- and this purpose may be served very well by countries that masquerade under a `` neutralist '' mask, yet in fact are dependable auxiliaries of the Soviet Foreign Office.

While modelling atoms in isolation may not seem realistic, if one considers atoms in a gas or plasma then the time-scales for atom-atom interactions are huge in comparison to the atomic processes that are generally considered.

Temperature and vibration isolation may be required for some instruments.

Its consequences may have led to the social isolation which made his life's later years so tragic.

According to a supposition, the peculiarities of this language may be the result of a supposed long isolation from other Eskimo groups, being in contact only with speakers of unrelated languages for many centuries.

These include cuckoldry, nuptial gifts, sperm competition, infanticide, physical beauty, mating by subterfuge, species isolation mechanisms, male parental care, ambiparental care, mate location, polygamy, and mechanisms that can only be called bizarre, including homosexual rape in certain male animals, cementing of females ' vaginal pores by males in some lepidopteran insects, and insect penises specialized to remove any sperm packets from females which may have been deposited by previous suitors.

For instance, a particular medicine may have different effects on different subpopulations, and these effects may be obscured or dismissed if such special subpopulations are not identified and examined in isolation.

This may include fears of having to enunciate specific vowels or consonants, fears of being caught stuttering in social situations, self-imposed isolation, anxiety, stress, shame, or a feeling of " loss of control " during speech.

If their reproductive isolation is incomplete, then further mating between the populations will produce hybrids, which may or may not be fertile.

Research in 2005 has shown that this rapid evolution of reproductive isolation may in fact be a relic of infection by Wolbachia bacteria.

Eventually, if reproductive isolation is achieved, it may lead to a separate species.

The admixture may be the result of a continuous gene flow from populations of European and Asian descent, or may be formed by a single event of admixture during a short period of time ( the hybrid isolation model ).

* when multiple VMs are concurrently running on the same physical host, each VM may exhibit a varying and unstable performance ( Speed of Execution, and not results ), which highly depends on the workload imposed on the system by other VMs, unless proper techniques are used for temporal isolation among virtual machines.

** The Apollo 11 astronauts return from the first successful Moon landing, and are placed in biological isolation for several days, on the chance they may have brought back lunar germs.

On meters that allow interfacing with computers, optical isolation may protect attached equipment against high voltage in the measured circuit.

Put Reading First adds that " although some readers may recognize words automatically in isolation or on a list, they may not read the same words fluently when the words appear in sentences in connected text.

Students who can read words in isolation quickly may not be able to automatically transfer this " speed and accuracy ".

Specifically, the isolation from the West may have caused Russia's later non-involvement in the Renaissance, the Protestant Reformation, and failure to develop a middle class.

However, " organic strategies " may result in a tangle of elements and subsystems, developed in isolation and subject to local optimization as opposed to meeting a global purpose.