61. PRODIGY Guidance - Atrial Fibrillation This guidance is for the management of people with atrial fibrillation, atrial fibrillation is classified according to the pattern of episodes http://www.prodigy.nhs.uk/guidance.asp?gt=Atrial fibrillation

62. Log In Problems atrial fibrillation (AF) is the most common form of arrhythmia, affecting millionsof patients New Guidelines Target Postoperative atrial fibrillation http://www.medscape.com/pages/editorial/resourcecenters/public/atrialfibrillatio

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63. Log In Problems An association between inflammation and AF is undoubtedly present, but is thereenough evidence yet to prove a causal relationship? http://www.medscape.com/viewarticle/509538?rss

64. Patient And Public Information Center : Heart Rhythm Society atrial fibrillation (also called AF or A Fib) is a common heart rhythm disordercaused by a problem in the conduction of electrical impulses in the upper http://www.hrspatients.org/patients/heart_disorders/atrial_fibrillation/default.

HOME CONTACT US SITE MAP THE NORMAL HEART ... EDUCACIÓN DEL PACIENTE Atrial Fibrillation Atrial Fibrillation (also called AF or A Fib) is a common heart rhythm disorder caused by a problem in the conduction of electrical impulses in the upper chambers, or atria, of the heart. A Fib and other rapid heartbeats that arise in the atria, or in the juncture between the atria and the lower chambers (ventricles) are called "supraventricular tachycardias." More than 2 million people in the U.S. have A Fib, and about 160,000 new cases are diagnosed each year. A Fib is uncommon among young people, although it can occur in people of any age. The likelihood of developing the condition, however, increases as we get older. After age 65, between 3 percent and 5 percent of people have atrial fibrillation. Approximately 9 percent of people who are age 80 or older have the condition. What Causes A Fib? In A Fib, the electrical signals that coordinate the muscle of the upper chambers (atria) of the heart become rapid and disorganized, typically causing the atria to beat faster than 300 beats per minute. (The normal rate when the heart is at rest is about 60 to 80 beats per minute). When this happens, the atria may contract poorly and no longer effectively force blood into the lower chambers (ventricles). As a result, the flow of blood to the body may be reduced. Atrial fibrillation may occur from time-to-time, or it may be a permanent condition. IF TREATED APPROPRIATELY, ATRIAL FIBRILLATION AND ATRIAL FLUTTER SELDOM CAUSE SERIOUS OR LIFE-THREATENING PROBLEMS.

65. Preventing Stroke In Atrial Fibrillation A new model CHADS - helps to predict the risk of stroke in atrial fibrillation. http://heartdisease.about.com/library/weekly/aa080601a.htm

zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') zfs=0;zCMt='a09' zCMTest=1 About Heart Disease / Cardiology Atrial Fibrillation Preventing stroke in atrial fibrillation Heart Disease Essentials Start Here - Cardiology 101 Symptoms and What They Mean ... Help zau(256,140,140,'el','http://z.about.com/0/ip/417/C.htm','');w(xb+xb+' ');zau(256,140,140,'von','http://z.about.com/0/ip/496/6.htm','');w(xb+xb); FREE Newsletter Sign Up Now for the Heart Disease / Cardiology newsletter! See Online Courses Search Heart Disease / Cardiology Preventing stroke in atrial fibrillation A new technique helps to predict the risk of stroke, and helps doctors decide when to anticoagulate By DrRich It has long been known that patients who have chronic, persistent, or frequent episodes of atrial fibrillation have an increased risk of stroke. (Click here for a review of atrial fibrillation and its treatment The increased risk comes from the fact that, during atrial fibrillation, the heart's atria are not squeezing effectively. Consequently, the blood tends to "pool" in the atria - and whenever blood flow is disrupted, blood clotting can occur. Clots that form in the atria can break loose eventually, and if the clots travel through the arteries to the brain, a stroke results. For patients who have atrial fibrillation, the risk of stroke depends on their age, and on other medical conditions they may have. Because the risk of stroke depends on several factors in addition to the presence of atrial fibrillation, deciding whether anticoagulation with Coumadin (a blood thinner) is warranted has been a relatively complicated decision.

66. Ablation Of Atrial Fibrillation Update on ablation of atrial fibrillation. atrial fibrillation is one of themost common heart arrhythmias, affecting millions of patients in the US http://heartdisease.about.com/cs/arrhythmias/a/ablateafib.htm

var zLb=4; var zIoa1 = new Array('Suggested Reading','Atrial fibrillation review','http://heartdisease.about.com/cs/arrhythmias/a/AFIB.htm'); zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') zfs=0;zCMt='a09' zCMTest=1 About Heart Disease / Cardiology Atrial Fibrillation Ablation of atrial fibrillation Heart Disease Essentials Start Here - Cardiology 101 Symptoms and What They Mean ... Help zau(256,140,140,'el','http://z.about.com/0/ip/417/C.htm','');w(xb+xb+' ');zau(256,140,140,'von','http://z.about.com/0/ip/496/6.htm','');w(xb+xb); FREE Newsletter Sign Up Now for the Heart Disease / Cardiology newsletter! See Online Courses Search Heart Disease / Cardiology Stay up to date! Compare Prices Email to a friend ... Print this page Suggested Reading Atrial fibrillation review Most Popular Increasing HDL Cholesterol and triglycerides symptoms Heart failure ... Trans fatty acids What's Hot Heart failure guidelines Treating cardiomyopathy glossary rimonabant for weight loss ... 3-drug regimen for HDL adunitCM(150,100,'x55') Ablation - A Cure for Atrial Fibrillation? From Richard N. Fogoros, M.D.

67. Atrial Fibrillation Treatment - EMedicine Health atrial fibrillation treatment is dependent on the type you have and the underlyingatrial fibrillation cause. http://www.emedicinehealth.com/articles/10829-6.asp

Search September 8, 2005 Registration Healthcare Professionals You are in: Heart Atrial Fibrillation Atrial Fibrillation Treatment Choice of treatment for atrial fibrillation depends on the type you have, the underlying cause, and your overall health. nbsp; Self-Care at Home There is no effective home treatment for atrial fibrillation. If your doctor recommends lifestyle changes or prescribes medicine, follow his or her recommendations exactly. This is the only way to see whether the treatment works. If it does not work, your health care provider wants to know so that he or she can prescribe a different treatment that might work better. Taking certain drugs (digoxin, warfarin) usually involves having your drug levels checked regularly until the correct dose is established. Medical Treatment Treatment has traditionally had 3 goals: to slow down the heart rate, to restore and maintain normal sinus rhythm, and to prevent stroke. Findings have recently come to light indicating that maintaining sinus rhythm saves no more lives than simply slowing down the heart rate, a much simpler goal. This is important because the medications used to maintain sinus rhythm have many more unwanted side effects and interactions with other drugs than the medications used to control rate. For example, an old drug, quinidine, caused an unexpected number of sudden cardiac deaths and is no longer used.

68. Medical Breakthroughs - Learn More About Diabetes Lone atrial fibrillation has no identifiable underlying cause and can occur Paroxysmal atrial fibrillation is a common form of atrial fibrillation (40 http://www.drkoop.com/encyclopedia/93/132.html

Home  Search: Dr.Koop Web MEDLINE Diseases Symptoms Procedures Natural Medicine ... Drug Library Learn More About Diabetes Presented By: Encyclopedia A B C D ... W Learn More Related Videos What is Diabetes? Who are the Members of a Diabetic Management Team? Role of the Pharmacist in Diabetes Management Preventing Type 1 Diabetes Related Stories Nondiabetics Should Watch Blood Sugar, Too Tight Glucose Control Needed for Diabetics Diabetes Dangerous in Women With Heart Disease Atrial Fibrillation Description of Atrial Fibrillation Causes and Risk Factors of Atrial Fibrillation Symptoms of Atrial Fibrillation Diagnosis of Atrial Fibrillation ... Questions To Ask Your Doctor About Atrial Fibrillation Definition of Atrial Fibrillation Atrial fibrillation (AF) is a particular type of heartbeat (arrhythmia) characterized by an extremely fast irregular rhythm. Description of Atrial Fibrillation When at rest, the healthy heartbeats between 60 and 90 times a minute, with the atria (the two upper chambers of the heart) beating slightly earlier than the ventricles (the two lower chambers of the heart). The rate and timing of contractions (beats) are regulated by electrical impulses generated by the sinoatrial node (a specialized group of cells that produce small amounts of electrical energy). In AF this orderly sequence of events is interrupted. As a result, the heart quivers or fibrillates (beats faster and irregularly), with the atria contracting up to 500 times a minute, and the ventricles contracting up to 180 times.

69. Dr. Koop - Atrial Fibrillation/flutter atrial fibrillation/flutter is a heart rhythm disorder (arrhythmia). It usuallyinvolves a rapid , in which the upper heart chambers (atria) are stimulated http://www.drkoop.com/ency/93/000184.html

Home Health Reference Atrial fibrillation/flutter Jul 29, 2005 Search: Dr.Koop MEDLINE Diseases Symptoms Procedures Natural Medicine ... Drug Library Inside DrKoop News Archive Animations Health Videos Health Tools ... Newsletters Atrial fibrillation/flutter Injury Disease Nutrition Poison ... Prevention Atrial fibrillation/flutter Definition: Atrial fibrillation/flutter is a heart rhythm disorder (arrhythmia). It usually involves a rapid heart rate , in which the upper heart chambers (atria) are stimulated to contract in a very disorganized and abnormal manner. Alternative Names: Auricular fibrillation; A-fib Causes, incidence, and risk factors: Arrhythmias are caused by a disruption of the normal functioning of the electrical conduction system of the heart. Normally, the atria and ventricles contract in a coordinated manner. In atrial fibrillation and flutter, the atria are stimulated to contract very quickly and differently from the normal activity originating from the sinoatrial node. This results in ineffective and uncoordinated contraction of the atria in atrial fibrillation, and in a peculiarly organized contraction pattern in atrial flutter. The condition can be caused by impulses which are transmitted to the ventricles in an irregular fashion or by some impulses failing to be transmitted. This makes the ventricles beat irregularly, which leads to an irregular (and usually fast) pulse in atrial fibrillation.

70. Atrial Fibrillation In atrial fibrillation, the heart s two upper chambers beat chaotically. Treatments for atrial fibrillation vary from person to person. http://www.cnn.com/HEALTH/library/DS/00291.html

International Edition MEMBER SERVICES The Web CNN.com Home Page World U.S. Weather ... Autos SERVICES Video E-mail Newsletters Your E-mail Alerts RSS ... Contact Us SEARCH Web CNN.com In association with: RELATED STORIES Heart and blood vessels definitions Cardiovascular System Aortic aneurysm Thrombophlebitis Varicose veins Heart arrhythmias ... Brain aneurysm INFORMATION CENTERS: Pick a category Health Centers Family Health Men's Health Women's Health Children's Health Seniors' Health Working Life Pain Management Condition Centers Immune System Allergy Alzheimer's Arthritis Respiratory System Cancer Endocrine System Digestive System Heart and Blood Infectious Disease Mental Health Note: All links within content go to MayoClinic.com Diseases and Conditions Atrial fibrillation From MayoClinic.com Special to CNN.com Overview Atrial fibrillation is a common heart rhythm problem. More than 2 million Americans have this condition, which can cause palpitations, shortness of breath, fatigue and stroke. The condition is increasingly common with advancing age. It affects less than 1 percent of Americans younger than 60, but as many as one in 10 people older than 80. In atrial fibrillation, the heart's two upper chambers beat chaotically. And they don't beat in coordination with the two lower chambers of the heart. The result is an irregular and often rapid heart rate.

71. Atrial Fibrillation atrial fibrillation is a condition in which the regular pumping function of theatria is replaced by a disorganized, ineffective quivering caused by chaotic http://www.medical-library.net/sites/_atrial_fibrillation.html

Atrial Fibrillation by Ron Kennedy, M.D., Santa Rosa, California Atrial fibrillation is a condition in which the regular pumping function of the atria is replaced by a disorganized, ineffective quivering caused by chaotic conduction of electrical signals through the upper chambers of the heart. Atrial fibrillation is often associated with other forms of cardiovascular disease, including one or more of the following: congestive heart failure, rheumatic heart disease, coronary artery disease, left ventricular hypertrophy, cardiomyopathy and hypertension. The progression of atrial fibrillation varies among individuals. Initial episodes of atrial fibrillation are generally symptomatic, intermittent paroxysmal episodes. Some people experience recurring episodes of atrial fibrillation that progress to a chronic state of continuous fibrillation. Although not immediately life threatening, atrial fibrillation may cause up to a 30% reduction in cardiac output resulting in shortness of breath, fatigue and reduced exercise capacity and a reduction in cerebral blood flow during the fibrillation episode, resulting in fainting and fatigue. Ventricular rates can also rise dangerously high when the chaotic signals of the atria are conducted to these lower chambers of the heart. More seriously, since the atria provide minimal pumping function during atrial fibrillation, blood pools in the chambers, which can lead to the formation of blood clots. Blood clots in the left atrium can dislodge and travel to the brain resulting in stroke.

72. Atrial Fibrillation In atrial fibrillation, the atrium contracts in a disorganized and inefficient way.It can affect the conduction of electrical impulses to the ventricles to http://healthlink.mcw.edu/article/901288788.html

Search Articles: search tips Please Take the HealthLink Survey Email this article Print this article Find related articles: By topic: Cardiac/Heart By keywords: atrial fibrillation fibrillation Receive Health Link via email! Subscribe now >> Atrial Fibrillation Q: I was about to have some dental work done but had to delay it because my dentist told me my heart was fibrillating. I saw my doctor, who did an EKG which confirmed that I did have atrial fibrillation and recommended further testing and blood thinning medication. I was feeling pretty good about my health until this happened. Is this a serious problem and if so, what can I expect? A: Your heart has four chambers. There are two receiving chambers for blood returning to the heart, called the left and right atrium. There are also two pumping chambers called the left and right ventricles. The atrium receives blood and also has a gentle and regular pumping ability that helps to fill the ventricle. Your heart also has a kind of internal wiring that begins in the atrium before going to the ventricle so that there is a sequence of the atrium pumping blood into the ventricle before the ventricle pumps blood to your lungs and the rest of your body. In atrial fibrillation, the atrium contracts in a disorganized and inefficient way and can also affect the conduction of electrical impulses to the ventricle; this may cause your heart to beat too fast. Most people with atrial fibrillation notice an irregular heartbeat. Blood can sometimes form clots in the fibrillating atrium, which can be life threatening if they find their way into your blood vessels, causing strokes or damage to your lungs.

73. Atrial Fibrillation -- Frequently Asked Questions Learning about atrial fibrillation What is atrial fibrillation? - What causesatrial fibrillation? - http://my.webmd.com/hw/heart_disease/tv6748.asp?src=pemedscape

74. From The Cleveland Clinic: Atrial Fibrillation: How To Keep A Steady Rhythm Health Information on atrial fibrillation,fibrillation atrial,Heart,cardiac,Treatments,treatment,Drug,drugs,travel,traveling,use,used,Atrial,atrium,ablation http://my.webmd.com/content/pages/9/1675_57844.htm?z=1675_00000_1034_tn_05

75. EMJA: Managing Atrial Fibrillation — Redrawing A Line In The Sand (Medical Journal of Australia) Managing atrial fibrillation — redrawing a linein the sand. http://www.mja.com.au/public/issues/178_10_190503/kil10052_fm.html

Home Issues Email alerts Classifieds ... Search PubMed for related articles Editorials Michael J Kilborn MJA The findings of two major trials show that rhythm control is not necessarily superior to rate control There are two broad strategic options in managing recurrent or persistent atrial fibrillation (AF). They are: Rhythm control , in which treatment is directed toward restoring and maintaining sinus rhythm; and Rate control , in which AF is allowed to continue or recur unimpeded, and medications are given to control ventricular rate. It has been a widely held and natural assumption that rate control is inferior to rhythm control. Theoretically, the advantages of maintaining sinus rhythm should include fewer thromboembolic complications, reduced need for anticoagulation, and less cardiac failure. In short, fewer deaths and fewer symptoms. However, antiarrhythmic medications have only modest efficacy for preventing AF recurrences, both symptomatic and asymptomatic, so rate-controlling and anticoagulant drugs must also be used in many patients being treated primarily for rhythm control. Also, antiarrhythmic medications can have serious side effects, including life-threatening proarrhythmia and, in the case of the commonly used drug amiodarone, pulmonary fibrosis, thyroid dysfunction and hepatic toxicity. Until recently, few randomised trial data have been available to gauge the extent to which these practical deficiencies offset the potential benefits of rhythm control. Now, two major trials comparing the two treatment strategies have been published.

76. Atrial Fibrillation atrial fibrillation is a type of arrthymia. With atrial fibrillation, the electricalsignals in the atria (the two small chambers of the heart) are fired in http://medicalcenter.osu.edu/patientcare/healthinformation/diseasesandconditions

Skip Navigation home about us referring ... Atrial Fibrillation Atrial Fibrillation How Your Heart Beats The following electrical heart conduction pathway must be followed to ensure the heart pumps properly: The heartbeat starts in the right atrium when a special group of cells (the sinus node or "pacemaker" of the heart) sends an electrical signal. The signal spreads throughout the atria and to the atrioventricular (A-V) node. The A-V node connects to a group of fibers in the ventricles that conduct the electric signal. The impulse travels down these specialized fibers to all parts of the ventricles. What is an arrhythmia? Arrhythmias (or dysrhythmias) are abnormal rhythms of the heart which cause the heart to pump less effectively. Normally, as the electrical impulse moves through the heart, the heart contracts - about 60 to 100 times a minute. Each contraction represents one heartbeat. The atria contract a fraction of a second before the ventricles so their blood empties into the ventricles before the ventricles contract. Under some conditions almost all heart tissue is capable of starting a heartbeat, or becoming the pacemaker. An arrhythmia occurs when:

77. Atrial Fibrillation Familydoctor.org Information about atrial fibrillation from the American Academy of Family Physicians. http://familydoctor.org/775.xml

Advanced Search familydoctor.org Home Conditions A to Z Atrial Fibrillation What is atrial fibrillation? Who is at risk for atrial fibrillation? What are the symptoms of atrial fibrillation? How is atrial fibrillation treated? ... What can I expect in the future? Atrial Fibrillation Printer-friendly version Email this article What is atrial fibrillation? Atrial fibrillation (say: ay-tree-all fib-rill-ay-shun) is an irregular heartbeat that may be very fast. Your heart has 4 chambers. The top 2 chambers are called the atria (say: ay-tree-ah). The bottom 2 chambers are called the ventricles (say: ven-trick-ells). In atrial fibrillation, the atria stop beating regularly. Instead, they tremble (fibrillate) in a disorganized way. This can cause an irregular, and sometimes very fast, heartbeat. Return to top Who is at risk for atrial fibrillation? Atrial fibrillation is most common in people older than 60 years of age. However, you can get atrial fibrillation at any age. Sometimes, atrial fibrillation has no cause, but your risk goes up if you have any of the following: Heart disease caused by high cholesterol A larger heart size caused by high blood pressure Damage to a heart valve An overactive thyroid gland Lung disease Heavy drinking of alcohol Use of certain medicines Return to top What are the symptoms of atrial fibrillation?

78. JHBMC Healthy Directions: Atrial Fibrillation atrial fibrillation is one of the most common arrhythmias or heart beat atrial fibrillation occurs in otherwise healthy individuals without any http://www.jhbmc.jhu.edu/healthy/healthconditions/cardio/afib.html

Atrial Fibrillation (AF) What is Atrial Fibrillation? Atrial Fibrillation is one of the most common "arrhythmias" or heart beat disorders. It is a very irregular and fast heart rhythm involving the upper chambers (atria) of the heart. What causes Atrial Fibrillation? Atrial fibrillation occurs in otherwise healthy individuals without any apparent cause. It is seen more frequently however, in persons with high blood pressure, heart disease, or overactive thyroid glands. It is also very common in older individuals. What are the symptoms of Atrial Fibrillation? Although some people have no symptoms, others experience mild shortness of breath, chest discomfort, or palpitations and fluttering in the chest. A few can develop serious symptoms such as fainting, severe and persistent chest pain, shortness of breath or stroke, all of which requires immediate treatment. What happens in the heart during Atrial Fibrillation? Describing how the normal heart beat helps to explain what happens during atrial fibrillation. The heart is a muscular pump divided into four chamberstwo chambers called atria on top, and two chambers called ventricles, on the bottom. Normally the atria contain the natural pacemaker of the heart which sends an electrical signal to the rest of the heart. As the signal travels through the heart, the heart contracts. The whole heart contracts regularly between 60 and 100 times per minute. During atrial fibrillation, the atria beat very rapidly and out of rhythm with the rest of the heart. This causes the heart beat to be very rapid and irregular which interferes with the overall pumping function of the heart.

79. BHF Heart Health - Heart Terms: Atrial Fibrillation The British Heart Foundation (BHF) is the leading national charity fighting heartand circulatory disease the UK s biggest killer. The BHF funds research, http://www.bhf.org.uk/hearthealth/index.asp?secID=1&secondlevel=74&thirdlevel=25

80. BHF Any Questions? - Atrial Fibrillation The British Heart Foundation (BHF) is the leading national charity fighting heartand circulatory disease the UK s biggest killer. The BHF funds research, http://www.bhf.org.uk/questions/index.asp?secondlevel=1154&thirdlevel=1187

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