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Topic: Hyperventilation

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	Hyperventilation - Wikipedia, the free encyclopedia
		Stress or anxiety commonly cause hyperventilation; this is known as hyperventilation syndrome.
		Hyperventilation also occurs as a consequence of various lung diseases, head injury or stroke (central neurogenic hyperventilation, apneustic respirations, ataxic respiration, Cheyne-Stokes respirations or Biot's respiration), or when the body lacks oxygen (hypoxia), for instance in high altitude or as a result of anaemia.
		Lastly, in the case of metabolic acidosis, the body uses hyperventilation to counter the increased acidity of the blood; this is known as Kussmaul breathing.
	en.wikipedia.org /wiki/Hyperventilation (633 words)

	Neurology - Hyperventilation Syndrome \| Brad McKechnie, DC, DACAN
		Hyperventilation syndrome is one of the most common causes of dizziness in the general population, accounting for up to 25 percent of dizziness complaints.
		Hyperventilation syndrome may present a diagnostic challenge to the chiropractic physician because of the diverse symptomatology associated with this disorder.
		The most commonly noted symptoms of hyperventilation syndrome are an ill-defined lightheadedness associated with perioral and digital paresthesias, tightness in the chest, a lump in the throat, sweating, trembling, palpitations, and possible ringing in the ears.
	www.chiroweb.com /archives/12/04/03.html (615 words)

	WDSU.com - Health Encyclopedia - Rapid Deep Breathing (Hyperventilation)
		Hyperventilation is rapid or deep breathing, usually caused by anxiety or panic.
		If you start hyperventilating, the goal is to raise the carbon dioxide level in your blood, which will put an end to most of your symptoms.
		Hyperventilation persists or worsens despite home treatment, or if it is accompanied by other symptoms.
	www.wdsu.com /encyclopedia/6863840/detail.html (1170 words)

	hyperventilation (Site not responding. Last check: 2007-10-20)
		Hyperventilators frequently present with symptoms suggestive of hear disease and indeed well marked physiological changes in heart action are produced.
		The primary cause of respiratory alkalosis is hyperventilation.
		Hyperventilation due to anxiety may be relieved by having the patient breath into a paper bag.
	www.danceokanagan.com /arp1/articles/hyperventilation.htm (2821 words)

	Hyperventilation may not be hyperventilation
		Hyperventilation is in some ways a maladaptive response to stress.
		The majority of patients with hyperventilation, the chest pain is due to UDB and attempted over-inflation of the lungs.
		Hyperventilation causes the carbon dioxide level in the blood to decrease.
	www.breathing.com /articles/hyperventilation.htm (2353 words)

	Hyperventilation -- Topic Overview
		Hyperventilation occurs when you breathe at a rate faster than your normal breathing pattern or when you breathe more deeply than your body requires with each breath.
		Hyperventilation is usually triggered by a change in the natural balance of the gas exchange
		Hyperventilation occurs most often in people who are nervous or tense, breathe shallowly, and have other medical conditions, such as lung diseases or panic disorder.
	www.webmd.com /hw/health_guide_atoz/tp2736.asp (333 words)

	Hyperventilation
		Hyperventilation is the breathing response kicked off by chemical changes in the blood such as high CO2 or low oxygen level.
		Hyperventilation is an unreasoning rapid breathing associated with psychological shortness of breath or feeling of smothering and is one of the symptom complex of a panic attack.
		This is impossible at depth and hyperventilation becomes an emergency requiring a controlled assisted ascent, with the strong possibility that rescue will be needed on the surface, due to the ineffectual, inappropriate behavior caused by the focused peripheral narrowing of the panic attack.
	www.scuba-doc.com /hypvnt.htm (564 words)

	Hyperventilation
		Hyperventilation is the condition of breathing deeper or faster than normal.
		Hyperventilation syndrome is caused by excess anxiety or emotional stress.
		Medication is seldom necessary for hyperventilation episodes, although sometimes the short-term use of anti-anxiety medication is helpful in persistent or unusual cases.
	www.rockwoodclinic.com /services/urgent_care/hyperventilation.htm (377 words)

	Hyperventilation Syndrome: A Diagnosis Begging for Recognition GREGORY J. MAGARIAN, MD;
		However, chronic or recurrent hyperventilation problems often are unrecognized probably for a variety of reasons, including the frequent lack of obvious overbreathing, a tendency to focus on one or two complaints that alone are not particularly suggestive of hyperventilation, minimal discussion of the topic in medical school and cursory coverage in medical textbooks.
		Although hyperventilation may have organic or physiologic causes, the syndrome of hyperventilation is usually associated with emotional triggers and thoracic breathing tendency.
		Once hyperventilation is initiated, persisting stresses of everyday living or the stresses of new bothersome symptoms from hyperventilation create the potential for a self- perpetuating cycle of chronic hyperventilation (Figure 1).
	members.westnet.com.au /pkolb/magarian.htm (2116 words)

	hyperventilation (Site not responding. Last check: 2007-10-20)
		Hyperventilation refers to excessively deep, rapid breathing to the extent that the patient develops noticeable symptoms.
		Some children and adolescents hyperventilate to a degree during exercise and may have some anxiety about the feelings of chest tightness they experience.
		A visit to the doctor may be in order for your physician to explain what is going on to your son or daughter and give some reassurance that nothing serious is going on.
	www.drhull.com /EncyMaster/H/hyperventilation.html (278 words)

	Hyperventilation at opensource encyclopedia (Site not responding. Last check: 2007-10-20)
		Hyperventilation is a state of decreased ratio of carbon dioxide production to alveolar respiration.
		Hyperventilation is a physical action characterized by increased release of a substance.
		It often refers to attacks of the hyperventilation syndrome, characterized by deep breathing, chest pain, and altered sensations of the fingers and lips.
	www.wiki.tatet.com /Hyperventilation.html (143 words)

	Hyperventilation may not be hyperventilation.
		Hospital admissions for possible cardiac or neurologic disorders are extremely common and many patients with chronic breathing pattern or breathing coordination problems carry an assortment of incorrect diagnosis with bottles of corresponding ineffective or even harmful medications.
		One study suggests that up to 90% of non-cardiac chest pain is thought to be induced by hyperventilation (De Guire et al 1992) Syndrome X refers to patients (mainly women) who get a history of angina with positive exercise test, but normal angiography.
		The majority of patients with hyperventilation, the chest pain is due to over-breathing, and over-inflation of the lungs.
	www.aboutbreathing.com /articles/hyperventilation.htm (2446 words)

	Apnea - Wikipedia, the free encyclopedia
		Many people have discovered, on their own, that voluntary hyperventilation before beginning voluntary apnea allows them to hold their breath for a longer time.
		Some of these people incorrectly attribute this effect to increased oxygen in the blood, not realizing that it is actually due to a decrease in CO in the blood and lungs.
		Blood leaving the lungs is normally fully saturated with oxygen, so hyperventilation of normal air cannot increase the amount of oxygen available.
	en.wikipedia.org /wiki/Apnea (914 words)

	Hyperventilation (Site not responding. Last check: 2007-10-20)
		Is this a psychological problem? Well, actually, there may be a component of anxiety or stress in a lot of the cases but the symptoms are real and not just made up in one's imagination.
		Hyperventilation means breathing too deeply or too fast or both, either obviously or subtly over a period of time.
		It is often difficult or, indeed, impossible to break the cycle of hyperventilation without intervening in the breathing/anxiety process (paper bag breathing/antianxiety medication).
	home.earthlink.net /~drbobshields/Hyperventilation.F.html (487 words)

	Hyperventilation therapy for acute traumatic brain injury
		Because hyperventilation is often associated with a rapid fall in intracranial pressure, it has been assumed to be effective in the treatment of severe head injury.
		Hyperventilation alone, as well as in conjunction with a buffer (THAM [tris-hydroxy-methyl-amino methane]), showed a beneficial effect on mortality at one year after injury, although the effect measure was imprecise (RR 0.73; 95%CI 0.36 to 1.49, and RR 0.89; 95% CI 0.47 to 1.72 respectively).
		For hyperventilation alone, the RR for death or severe disability was 1.14 (95% CI 0.82 to 1.58).
	www.cochrane.org /reviews/en/ab000566.html (510 words)

	Adult Health Advisor 2005.4: Hyperventilation Syndrome
		Hyperventilation syndrome is a condition brought on by rapid, shallow breathing.
		Hyperventilation can be very alarming because it can appear to be a different, more serious problem, such as an asthma attack or stroke.
		The rapid, shallow breathing of hyperventilation most often occurs when you are anxious or emotionally upset.
	www.med.umich.edu /1libr/aha/aha_hyperven_crs.htm (482 words)

	Hyperventilation alters arterial baroreflex control of heart rate and muscle sympathetic nerve activity -- Van de Borne ...
		Hyperventilation increased the magnitude of respiratory oscillations in SBP from 2 ± 0.3 to 9 ± 1 mmHg
		Hyperventilation (solid line) reduced neither the coherence between respiratory oscillations in SBP and RR (A) nor the coherence between respiratory oscillations in SBP and MSNA (B) recorded during controlled breathing (dotted line).
		Hyperventilation, however, reduced the sensitivity of the arterial baroreflex to respiratory-related oscillations in SBP at both cardiac (SBP-RR, from 7 to 4 ms/mmHg) and MSNA levels (SBP-MSNA, from 9 to 6 au/mmHg).
	ajpheart.physiology.org /cgi/content/full/279/2/H536 (3814 words)

	Auckland Allergy Clinic - Allergies, Asthma, Exercise, Hyperventilation, and Panic Disorders; is there a common link?
		Hyperventilation was discussed with the patient and he was encouraged to seek physiotherapy assistance for his dysfunctional breathing pattern.
		Hyperventilation Syndrome is very common in the general population and might aggravate symptoms in about one third of asthmatics.
		Hyperventilation Syndrome can be effectively treated with a course of physiotherapy treatment, including education, relaxation and breathing control.
	www.allergyclinic.co.nz /guides/47.html (2794 words)

	eMedicine - Hyperventilation Syndrome : Article by Edward Newton, MD (Site not responding. Last check: 2007-10-20)
		Because of the subtlety of the hyperventilation, many patients with chronic HVS are admitted and undergo extensive and expensive testing in an attempt to discover organic causes of their complaints.
		Provoking the symptoms by having the patient voluntarily hyperventilate for 3-4 minutes often convinces the patient of the diagnosis but is time-consuming and may be ineffective.
		Complications are related mainly to invasive procedures and investigations (eg, angiography) or to symptoms produced indirectly by hyperventilation (eg, injuries sustained in a fall during a syncopal episode due to hyperventilation).
	www.emedicine.com /EMERG/topic270.htm (3896 words)

	Hyperventilation Syndrome (Site not responding. Last check: 2007-10-20)
		A classic example is the occurrence of the hyperventilation syndrome during separation or divorce proceedings, so that the event becomes a call for help to the estranged spouse.
		The symptoms of hyperventilation syndrome are due to carbon dioxide loss from overbreathing.
		Having the person voluntarily hyperventilate (50 deep breaths while lying on a couch) to demonstrate that this reproduces the symptoms of the previous episode is frequently helpful.
	www.vandenberg.af.mil /~MDG/selfCare/chap8/s101.htm (557 words)

	Hyperventilation Syndrome (Site not responding. Last check: 2007-10-20)
		Hyperventilation syndrome is a breathing pattern disorder which affects about one in ten people in the normal population.
		But more subtle is CHRONIC hyperventilation which is characterised by a wide array of symptoms, mimicking serious disease, baffling to both sufferer and doctor alike.
		In chronic hyperventilators, too much carbon dioxide is breathed out, altering normal body chemistry and disturbing the body's pH (acid/alkaline balance), producing unpleasant body changes.
	www.anxious.org.nz /HVS.htm (729 words)

	Hyperventilation (Site not responding. Last check: 2007-10-20)
		Hyperventilation is breathing in excess of what the body needs.
		Hyperventilation syndrome is more specific and relates to an overbreathing pattern that happens under certain conditions.
		Although hyperventilation syndrome may seem very similar to panic attacks, the 2 disorders are different.
	www.emedicinehealth.com /hyperventilation/article_em.htm (191 words)

	Hyperventilation (overbreathing) panic attack symptoms / causes - course part 4
		About 60% of attacks are accompanied by hyperventilation and many panickers overbreathe even whilst relaxed.
		The most important thing to understand about hyperventilation is that although it can feel as if you don't have enough oxygen, the opposite is true.
		When you hyperventilate, you do not give your body long enough to retain CO2, and so your body cannot use the oxygen you have.
	www.panic-attacks.co.uk /panic_attacks_4.htm (719 words)

	Orthostatic increase of respiratory gas exchange in hyperventilation syndrome -- GARDNER 55 (4): 257 -- Thorax
		Hyperventilation syndrome: measurement of objective symptoms and subjective complaints.
		Double-blind placebo-controlled study of the hyperventilation provocation test and the validity of the hyperventilation syndrome.
		Respiratory and psychiatric abnormalities in chronic symptomatic hyperventilation.
	thorax.bmjjournals.com /cgi/content/full/55/4/257 (1822 words)

	Hyperventilation in head injury : a review CHEST - FindArticles (Site not responding. Last check: 2007-10-20)
		Hyperventilation lowers intracranial pressure (ICP) by the induction of cerebral vasoconstriction with a subsequent decrease in cerebral blood volume.
		The downside of hyperventilation, however, is that cerebral vasoconstriction may decrease cerebral blood flow to ischemic levels.
		Considering the risk-benefit relation, it would appear to be clear that hyperventilation should only be considered in patients with raised ICP, in a tailored way and under specific monitoring.
	www.findarticles.com /p/articles/mi_m0984/is_5_127/ai_n13784190 (192 words)

	Hyperventilation
		Hyperventilation is breathing faster and more deeply than normal due to anxiety or stress.
		Hyperventilation is usually caused by anxiety, but injury or illness can also be the cause.
		Hyperventilation may also be linked to emotional problems, such as a panic attack.
	www.stjohn.org /HealthInfoLib/swArticle.aspx?2,140 (266 words)

	Hyperventilation syndrome: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-20)
		Psychiatry is a branch of medicine that studies and treats mental and emotional disorders (see mental illness)....
		In medicine, chest pain is a symptom of a number of serious conditions and is generally considered a medical emergency, unless the patient is a known angina...
		In medicine, hyperventilation, also known as tachypnea or hyperpnea, is the state of breathing faster or deeper than necessary, and thereby reducing...
	www.absoluteastronomy.com /encyclopedia/h/hy/hyperventilation_syndrome.htm (870 words)

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