Aortic stenosis<

Aortic stenosis< - Medicow

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<bb>>Aorticb>bb>> valve stenosis - Wikipedia, the free encyclopedia

<bb>>Aorticb>bb>> valve stenosis (AS) is a heart condition caused by the incomplete opening of the <bb>>aorticb>bb>> valve.
The Gorlin equation states that the <bb>>aorticb>bb>> valve area is equal to the flow through the <bb>>aorticb>bb>> valve during ventricular systole divided by the systolic pressure gradient across the valve times a constant.
The flow across the <bb>>aorticb>bb>> valve is calculated by taking the cardiac output (measured in liters/minute) and dividing it by the heart rate (to give output per cardiac cycle) and then dividing it by the systolic ejection period measured in seconds per beat (to give flow per ventricular contraction).

http://en.wikipedia.org/wiki/Aortic_stenosis (1695 words)



<bb>>Aorticb>bb>> Valve Stenosis

The risk of surgery is higher than average for people who have severe <bb>>aorticb>bb>> valve stenosis, failure of the left ventricle, and a low ejection fraction.
if you have symptoms of <bb>>aorticb>bb>> valve stenosis, unless you have other conditions that make surgery too risky.
In rare cases, the <bb>>aorticb>bb>> valve may be replaced with another heart valve (usually the pulmonic valve between the lower right heart chamber and the opening to the artery that goes to the lungs).

http://www.bchealthguide.org/kbase/topic/special/hw179837/sec13.htm (568 words)



MedlinePlus Medical Encyclopedia: <bb>>Aorticb>bb>> stenosis

<bb>>Aorticb>bb>> stenosis is the narrowing or obstruction of the heart's <bb>>aorticb>bb>> valve, which prevents it from opening properly and blocks the flow of blood from the left ventricle to the aorta.
<bb>>Aorticb>bb>> stenosis is curable with surgical repair, although there may be a continued risk for arrhythmias, which can sometimes cause sudden death.
Surgical repair or replacement of the valve is the preferred treatment for symptomatic <bb>>aorticb>bb>> stenosis.

http://www.nlm.nih.gov/medlineplus/ency/article/000178.htm (758 words)



<bb>>Aorticb>bb>> Valve Stenosis and Insufficiency

The <bb>>aorticb>bb>> valve lets blood flow from the heart's left ventricle into the aorta.
Your <bb>>aorticb>bb>> valve can be surgically replaced in three ways:
The Ross procedure, a surgery in which your <bb>>aorticb>bb>> valve is removed and replaced by your pulmonary valve.

http://www.americanheart.org/presenter.jhtml?identifier=11068 (665 words)



<bb>>Aorticb>bb>> Valve Stenosis

The three major causes of <bb>>aorticb>bb>> stenosis are calcific degeneration or deposits of calcium on the valve (primarily affects the elderly), congenital abnormality with only two instead of three cusps, and rheumatic fever.
<bb>>Aorticb>bb>> stenosis can occur at any age (because the causes are different) but is usually asymptomatic until middle or old age.
Other symptoms associated with <bb>>aorticb>bb>> stenosis are angina (chest pain) and fainting upon exertion (syncope).

http://health.iowa.com/global/story.asp?s=1230258 (529 words)



Gale Encyclopedia of Medicine: <bb>>Aorticb>bb>> valve stenosis

When <bb>>aorticb>bb>> valve stenosis occurs, the <bb>>aorticb>bb>> valve, located between the aorta and left ventricle of the heart, is narrower than normal size.
When the valve narrows, as it does with stenosis, blood flow is impeded.
The valve can be replaced with a mechanical valve, a valve from a pig, or by moving the patient's other heart valve (pulmonary) into the position of the <bb>>aorticb>bb>> valve and then replacing the pulmonary valve with an mechanical one.

http://www.findarticles.com/p/articles/mi_g2601/is_0001/ai_2601000134 (787 words)



Congenital <bb>>Aorticb>bb>> Valve Stenosis

“Congenital” <bb>>aorticb>bb>> valve stenosis means the condition is present at birth.
<bb>>Aorticb>bb>> valve stenosis can run in families or may be due to something that happened to the fetus during pregnancy.
Adolescents with hypertrophic cardiomyopathy, a type of <bb>>aorticb>bb>> stenosis where the left ventricle is noticeably enlarged, have the greatest risk of sudden heart failure.

http://www.hmc.psu.edu/healthinfo/c/conaorticvalve.htm (573 words)



<bb>>Aorticb>bb>> Valve Stenosis

Is your <bb>>aorticb>bb>> stenosis due to a Bicuspid valve or is your valve
I had a CMV in 1971 and MVR with St. Jude mechanical valve in 1986, since then Ive been taking blood thinner drugs and diuretics.
I have not heard of this surgery and would not rush to any new surgery that is not proven by time.

http://www.medhelp.org/forums/cardio/messages/35223.html (616 words)



<bb>>Aorticb>bb>> Valve Stenosis

Rarely, these valve problems may occur in infancy, such as poor blood flow, anemia, and heart failure.
Severe blockage may cause chest pain or feeling a loss of consciousness with activity.
If the defect causes life-threatening heart failure in infancy, immediate surgery to repair the valve will be necessary.

http://www.csmc.edu/5801.html (419 words)



<bb>>Aorticb>bb>> Stenosis - Heart Disease and other cardiovascular conditions on MedicineNet.com

A number of conditions cause disease and narrowing of the <bb>>aorticb>bb>> valve (<bb>>aorticb>bb>> stenosis).
<bb>>Aorticb>bb>> Stenosis - Heart Disease and other cardiovascular conditions on MedicineNet.com
Blood is pumped by the left ventricle across the <bb>>aorticb>bb>> valve into the aorta and the arteries of the body.

http://www.medicinenet.com/aortic_stenosis/article.htm (475 words)



<bb>>Aorticb>bb>> Valve Stenosis -- Overview

When the heart rests between beats, the <bb>>aorticb>bb>> valve closes to keep blood from flowing backward into the heart.
When the heart pumps, the <bb>>aorticb>bb>> valve opens to allow oxygen-rich blood to flow from the left ventricle into the aorta.
In the lower left chamber (left ventricle), the <bb>>aorticb>bb>> valve

http://www.webmd.com/hw/heart_disease/hw179839.asp (107 words)



U-M CVC - <bb>>Aorticb>bb>> Stenosis

Valvar <bb>>aorticb>bb>> stenosis can be treated surgically or by balloon dilation, a procedure done in the cardiac catheterization lab.
More severe <bb>>aorticb>bb>> stenosis may cause chest pain that is related to exercise, decreased stamina, palpitations or "skipping beats", and/or fainting.
<bb>>Aorticb>bb>> stenosis is a term used to describe congenital heart defects that cause obstruction of blood flow from the heart to the body.

http://www.med.umich.edu/cvc/mchc/paraor.htm (107 words)



<bb>>Aorticb>bb>> Stenosis, Cincinnati Children's Hospital Medical Center

The most common form of <bb>>aorticb>bb>> stenosis is obstruction at the valve itself, referred to as <bb>>aorticb>bb>> valvar stenosis, which is the subject of this section.
Cardiac catheterization is an invasive technique that enables physicians to accurately quantify the degree of <bb>>aorticb>bb>> stenosis that is present.
<bb>>Aorticb>bb>> Stenosis refers to a condition that causes obstruction to blood flow between the left ventricle and the aorta.

http://www.cincinnatichildrens.org/health/heart-encyclopedia/anomalies/avs.htm (1844 words)



Postgraduate Medicine: Timely intervention in asymptomatic <bb>>aorticb>bb>> stenosis

<bb>>Aorticb>bb>> valve replacement is rarely justified for asymptomatic patients with hemodynamically significant stenosis, because the clinical course is benign and the risk for sudden cardiac death is low.
In mild <bb>>aorticb>bb>> stenosis, when the cardiac output is normal, the murmur may be loud and associated with a thrill, and typically it peaks in early to mid systole.
Some investigators have found that early lesions in <bb>>aorticb>bb>> stenosis are characterized by subendothelial thickening on the <bb>>aorticb>bb>> side of the leaflet due to accumulation of cellular lipid infiltrate and extracellular mineralization (5).

http://www.postgradmed.com/issues/2001/08_01/park.htm (3625 words)



<bb>>Aorticb>bb>> valve stenosis

<bb>>Aorticb>bb>> stenosis can be treated effectively with surgery.
<bb>>Aorticb>bb>> stenosis also may be related to age and the buildup of calcium deposits on heart valves or a history of rheumatic fever.
For example, some infants are born with an <bb>>aorticb>bb>> valve in which the leaflets of the valve are fused together.

http://www.cnn.com/HEALTH/library/DS/00418.html (3625 words)



U-M CVC - <bb>>Aorticb>bb>> Stenosis

Valvar <bb>>aorticb>bb>> stenosis can be treated surgically or by balloon dilation, a procedure done in the cardiac catheterization lab.
More severe <bb>>aorticb>bb>> stenosis may cause chest pain that is related to exercise, decreased stamina, palpitations or "skipping beats", and/or fainting.
<bb>>Aorticb>bb>> stenosis is a term used to describe congenital heart defects that cause obstruction of blood flow from the heart to the body.

http://www.med.umich.edu/cvc/mchc/paraor.htm (2576 words)



<bb>>AORTICb>bb>> VALVE REPLACEMENT

<bb>>Aorticb>bb>> valve replacement is an "open heart" procedure performed by cardithoracic surgeons for treatment of narrowing (stenosis) or leakage (regurgitation) of the <bb>>aorticb>bb>> valve.
After successful <bb>>aorticb>bb>> valve replacement, patients can expect to return to their preoperative condition or better.
The <bb>>aorticb>bb>> valve is the outflow valve of the left side of the heart, meaning that it opens during systole (when the ventricle contracts or squeezes blood out into the aorta and the rest of the body).

http://www.sts.org/doc/3620 (2576 words)



<bb>>Aorticb>bb>> Stenosis

Editor’s note : This is the British plan for the control of <bb>>aorticb>bb>> stenosis, sent to us by Dr. Bruce Cattanach, a geneticist who was also instrumental in eliminating another hereditary boxer health problem in England.
to provide breeders with a means of breeding away from or avoiding <bb>>aorticb>bb>> stenosis and, hopefully, other heart conditions;
Because <bb>>aorticb>bb>> stenosis develops progressively it cannot be assumed that those that are free of murmurs or have only grade 1 murmurs will be found to be so as adults; their prospects may nevertheless be considered relatively good.

http://www.boxerunderground.com/aug_99/aorticstenosis.htm (2576 words)



Rottweiler Club of Canada - <bb>>Aorticb>bb>> Stenosis

<bb>>Aorticb>bb>> stenosis(AS) had been reported to be the third most prevalent congenital cardiac disorder in the dog, but researchers at the Ontario Veterinary College (Dr. Michael O'Grady Dip-ACVIM Cardiology and staff) have found it to be the most common congenital cardiac disorder in dogs they have examined.
It has been reported that if a dog with <bb>>aorticb>bb>> stenosis lives to be greater then three years of age, it USUALLY does not have <bb>>aorticb>bb>> stenosis that is severe enough to affect left ventricular performance.
<bb>>Aorticb>bb>> stenosis may be subvalvular, valvular or supravalvular, depending on where the constriction is located.

http://www.rottclub.ca/aortic.html (2576 words)



<bb>>Aorticb>bb>> stenosis definition - Medical Dictionary definitions of popular medical terms

<bb>>Aorticb>bb>> stenosis: Narrowing (stenosis) of the heart valve between the left ventricle of the heart and the aorta.
<bb>>Aorticb>bb>> Stenosis - <bb>>Aorticb>bb>> Valve Stenosis is the narrowing (stenosis) of the heart valve between the left ventricle of the heart and the aorta.
Our <bb>>Aorticb>bb>> stenosis Main Article provides a comprehensive look at the who, what, when and how of <bb>>Aorticb>bb>> stenosis

http://www.medterms.com/script/main/art.asp?articlekey=2297 (353 words)



<bb>>Aorticb>bb>> valve stenosis

<bb>>Aorticb>bb>> valve stenosis can be treated effectively with surgery.
<bb>>Aorticb>bb>> valve stenosis also may be related to age and the buildup of calcium deposits on heart valves or a history of rheumatic fever.
<bb>>Aorticb>bb>> valve stenosis — or <bb>>aorticb>bb>> stenosis — is a condition in which the heart's <bb>>aorticb>bb>> valve narrows.

http://www.cnn.com/HEALTH/library/DS/00418.html (2955 words)



BROMS THREE-PATCH TECHNIQUE FOR REPAIR OF SUPRAVALVULAR <bb>>AORTICb>bb>> STENOSIS -- Hazekamp et al. 118 (2): 252 -- The Journal of Thoracic and Cardiovascular Surgery

Concurrence of supravalvular <bb>>aorticb>bb>> stenosis and peripheral pulmonary stenosis in three generations of a family: a form of arterial dysplasia.
Supravalvular <bb>>aorticb>bb>> stenosis: a 29-year review of surgical experience.
Results of surgical repair of congenital <bb>>aorticb>bb>> stenosis.

http://jtcs.ctsnetjournals.org/cgi/content/full/118/2/252 (2955 words)



Clinical Trial: Balloon Valvuloplasty Registry

Major issues needed to be addressed prior to general acceptance of this therapy for both <bb>>aorticb>bb>> and mitral stenosis and for operative and nonoperative candidates.
In addition, there are a number of patients with <bb>>aorticb>bb>> stenosis who are not candidates for <bb>>aorticb>bb>> valve replacement because of unacceptable operative risks who might be dramatically improved by balloon valvuloplasty.
<bb>>Aorticb>bb>> stenosis is most commonly the result of calcific degeneration of a normal tricuspid <bb>>aorticb>bb>> valve in the elderly or the result of rheumatic fever but can also develop in a congenital bicuspid <bb>>aorticb>bb>> valve which becomes progressively more stenotic with age and the wear of abnormal flow patterns.

http://clinicaltrials.gov/show/NCT00005199 (1029 words)



<bb>>Aorticb>bb>> Stenosis - CardiologyChannel

<bb>>Aorticb>bb>> stenosis (AS), also called <bb>>aorticb>bb>> valve stenosis, is a condition in which the <bb>>aorticb>bb>> valve has become narrowed or constricted (stenotic) and does not open normally.
When the heart relaxes between contractions, the <bb>>aorticb>bb>> valve closes, preventing blood in the aorta from returning to the left ventricle.
The most common cause of <bb>>aorticb>bb>> stenosis is age-associated degeneration and calcification of the <bb>>aorticb>bb>> valve, which often causes symptoms in elderly patients.

http://cardiologychannel.com/aorticstenosis (1029 words)



<bb>>Aorticb>bb>> Valve Disease

<bb>>Aorticb>bb>> stenosis, for the purposes of this chapter, refers to obstruction of flow at the level of the <bb>>aorticb>bb>> valve, and will not include the sub- and supravalvular forms of this disease.
The etiology of the regurgitation as with <bb>>aorticb>bb>> stenosis, can be further defined based on the anatomy of the valve and <bb>>aorticb>bb>> root, and the disease process affecting the valve.
For <bb>>aorticb>bb>> stenosis due to a bicuspid valve, the approximate overall incidence of an anatomic bicuspid <bb>>aorticb>bb>> valve is 1% to 2% of the population.

http://www.clevelandclinicmeded.com/diseasemanagement/cardiology/aortic_valve/aortic_valve.htm (3488 words)



<bb>>Aorticb>bb>> dissection - Wikipedia, the free encyclopedia

The risk of dissection in individuals with bicuspid <bb>>aorticb>bb>> valve is not associated with the degree of stenosis of the valve.
While many patients with an <bb>>aorticb>bb>> dissection have a history of hypertension, the blood pressure is quite variable at presentation with acute <bb>>aorticb>bb>> dissection, and tends to be higher in individuals with a distal dissection.
Anterior chest pain is associated with dissections involving the ascending aorta, while intrascapular (back) pain is associated with descending <bb>>aorticb>bb>> dissections.

http://en.wikipedia.org/wiki/Aortic_dissection (3663 words)



<bb>>Aorticb>bb>> valve - Wikipedia, the free encyclopedia

This condition is often undiagnosed until later in life when the person develops symptomatic <bb>>aorticb>bb>> stenosis.
<bb>>Aorticb>bb>> stenosis occurs in this condition usually in patients in their 40s or 50s, an average of 10 years earlier than can occur in people with congenitally normal <bb>>aorticb>bb>> valves.
The Ross procedure involves going to surgery to have the <bb>>aorticb>bb>> valve removed and replacing it with the patient's own pulmonary valve.

http://en.wikipedia.org/wiki/Aortic_valve (370 words)



Pathology of Congenital Heart Disease

The valve is commonly bicuspid in <bb>>aorticb>bb>> stenosis and the leaflets are asymmetric in 40% of cases.
<bb>>Aorticb>bb>> stenosis most probably begets <bb>>aorticb>bb>> stenosis rather than being a result of bicuspid <bb>>aorticb>bb>> valve since bicuspid <bb>>aorticb>bb>> valve is 10-20 times as common as <bb>>aorticb>bb>> stenosis.
Many other congenital anomalies may be present, for example, hypoplastic left heart, however, this would be with good <bb>>aorticb>bb>> valve size and ascending aorta and mitral atresia may sometimes be present.

http://www.pediatriccardiology.uchicago.edu/MP/Pathology/pathology.htm (370 words)



Mitral Stenosis

In contrast to isolated congenital infantile valvular <bb>>aorticb>bb>> stenosis, a condition in which the valve leaflets are often primitive and deformed, <bb>>aorticb>bb>> valvotomy and/or subsequent valve replacement are not necessary, resulting in a better long-term prognosis.
Mitral valve replacement and bypass are high-risk operations in the infant with severe mitral stenosis.
Nine heart specimens with <bb>>aorticb>bb>> and mitral atresia (group 1) were studied and compared with 19 hearts with <bb>>aorticb>bb>> atresia and mitral stenosis (group 2) (EFE of the LV was present in all cases) and 10 normal hearts.

http://www.pediheart.org/searches/topic/ms.htm (5439 words)



Cardiovascular risk factors in patients with <bb>>aorticb>bb>> stenosis predict prevalence of coronary artery disease but not of <bb>>aorticb>bb>> stenosis: an angiographic pair matched case-control study -- Ortlepp et al. 89 (9): 1019 -- Heart

Apolipoprotein <bb>>Bb>bb>>, (a) and E accumulate in the morphological early lesion of "degenerative" valvular <bb>>aorticb>bb>> stenosis.
Cardiovascular risk factors in patients with <bb>>aorticb>bb>> stenosis predict prevalence of coronary artery disease but not of <bb>>aorticb>bb>> stenosis: an angiographic pair matched case-control study -- Ortlepp et al.
Cardiovascular risk factors in patients with <bb>>aorticb>bb>> stenosis predict prevalence of coronary artery disease but not of <bb>>aorticb>bb>> stenosis: an angiographic pair matched case–control study

http://heart.bmjjournals.com/cgi/content/full/89/9/1019 (1666 words)

Topic: <b>Aortic</b> <b>stenosis<

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