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Doctor insights on: Why Does Atrial Fibrillation Cause Strokes

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Why does atrial fibrillation cause strokes?

Why does atrial fibrillation cause strokes?

Clot formation: Because blood in the left atrium is not propelled forward normally during atiral fibrillation, it allows for the formation of clots. Small areas of blood pooling resembling little eddy currents allow blood to slow down and form clots. If one of these clots is then propelled forward it can travel to the brain, become lodged in a blood vessel and cause a stroke.A clot the size of a pinhead can do it. ...Read more

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Dr. John Garner
1,825 doctors shared insights

Atrial Fibrillation (Definition)

A heart condition, in which the electrical activity of the heart is abnormal. This abnormal electrical signal causes the heart muscle to contract when it is not supposed to and thus blood is ...Read more


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Am i at an increased risk of stroke? With atrial fibrillation, am i at increased risk of having a stroke?

Am i at an increased risk of stroke? With atrial fibrillation, am i at increased risk of having a stroke?

Usually yes.: I'm assuming you're a woman, which makes the answer a definite "yes." the only question then is how much extra. Google yourself something called a "cha2ds2-vasc calculator" and plug in your info. The baseline population risk is ~0.8%/year for comparison. ...Read more

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Purpose of arixtra in the prevention of stroke in patients with atrial fibrillation?

Purpose of arixtra in the prevention of stroke in patients with atrial fibrillation?

Low molecular wt hep: It's a low molecular weight heparin, given subcutaneously to anti-coagulate ("thin the blood") and prevent clotting. ...Read more

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Atrial fibrillation... What type of pain occurs before and during heart attack or stroke?

Atrial fibrillation... What type of pain occurs before and during heart attack or stroke?

Heart: Anterior crushing pressure with arm extension- radiation. Angina= neck pain or "feeling" impending doom! anxiety shortness of breath diaphoresis ='sweaty clammy nothing- ladies dismiss any symptoms. ...Read more

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What is the role of arixtra in the prevention of stroke in patients with atrial fibrillation?

What is the role of arixtra in the prevention of stroke in patients with atrial fibrillation?

Limited: This particular agent is only given subcutaneously so its use is pretty much limited to, if we just focus on atrial fibrillation here, those patients who cannot take an oral anticoagulant but are felt by their doctors to be at high risk for an embolic stroke or event in the setting of atrial fibrillation. There are oral medications that have similar mechanisms of action and validated efficacy. ...Read more

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What is the role of arixtra in the prevention of stroke in patients with atrial fibrillation?

What is the role of arixtra in the prevention of stroke in patients with atrial fibrillation?

They haven't paid up: Until they they go through untrackable bribing process and get the indication, just have to use unofficially. ...Read more

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What meds can I use to control my a fib? What are the risks and side effects of medications to control my atrial fibrillation or to reduce the risk of stroke? What are the risks/benefits of other treatment options?

What meds can I use to control my a fib? What are the risks and side effects of medications to control my atrial fibrillation or to reduce the risk of stroke? What are the risks/benefits of other treatment options?

The : The treatment of atrial fibrillation has two important components: 1) treating the rhythm, and 2) preventing stroke. There are two strategies for treating the rhythm. The first is called the rate control strategy, and involves using medicines to prevent the heart rate from going too fast. These medicines do not prevent atrial fibrillation episodes, but are generally effective at preventing fast rhythms and also tend to have few side effects. This is a good strategy for people who do not have severe symptoms from atrial fibrillation, such as older less active people. The second strategy is called the rhythm control strategy, and involves using medications that are designed to maintain normal sinus rhythm and prevent episodes of atrial fibrillation. This strategy may be more desirable for people who are vey symptomatic when in atrial fibrillation such as young, active people. Unfortunately, this strategy tends to be less successful because recurrence of atrial fibrillation is common. The rhythm control medications also tend to have more side effects than the rate control medicines, and in some cases the side effects can be severe. Neither strategy is better than the other at preventing stroke. For stroke prevention, warfarin (also called coumadin) is typically used for people at moderate or high risk. This medication has been shown to be superior in preventing stroke, but it also increases the risk of dangerous bleeding because it is a blood thinner. Patients at lower risk for stroke may just take an Aspirin tablet daily. This has a lower bleeding risk than warfarin. Lastly, some people are candidates for surgical or catheter-based ablation procedures. These procedures can cure atrial fibrillation, but are not always successful and not all people are good candidates. ...Read more

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What is the prognosis for a 75 yr old who had a massive stroke and now has MRSA infection in his finger bone? COPD,alcoholism, atrial fibrillation

What is the prognosis for a 75 yr old who had a massive stroke and now has MRSA infection in his finger bone? COPD,alcoholism, atrial fibrillation

Too many variables: There are so many variable regarding prognosis after stroke, and the presence of associated diseases creates even more variables. There are tables regarding degrees of consciousness and outcome, but these are not definitive even if they are historically relevant. Suggest you speak to the treating physician(s) involved in care and have most of the historical information. ...Read more

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Father, 69, requires Cataract surgery in both eyes. He's on Dabigatran, Clopidogrel for Heart attack, Atrial Fibrillation, Vascular Stroke for 3 years. Had minor strokes in 2008 and 2009. Need advice on cataract surgery while on dabigatran, any risks?

Father, 69, requires Cataract surgery in both eyes. He's on Dabigatran, Clopidogrel for Heart attack, Atrial Fibrillation, Vascular Stroke for 3 years. Had minor strokes in 2008 and 2009. Need advice on cataract surgery while on dabigatran, any risks?

Dabigatran /cataract: Yes. dabigatran can cause more bleeding during surgery, which could affect the surgery .Many times they have patients in the hospital on heparin 1 day before the surgery and then stop the heparin 3-4 hours before surgery and restart meds after surgery This is an issue that has to be discussed with the cardiologist and surgeon especially since your father has had strokes f/u w/ cardiology ...Read more

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Father, 69, requires Cataract surgery in both eyes. He's on Dabigatran, Clopidogrel for Heart attack, Atrial Fibrillation, Vascular Stroke for 3 years. Had minor strokes in 2008 and 2009. Need advice on cataract surgery while on dabigatran, any risks?

Father, 69, requires Cataract surgery in both eyes. He's on Dabigatran, Clopidogrel for Heart attack, Atrial Fibrillation, Vascular Stroke for 3 years. Had minor strokes in 2008 and 2009. Need advice on cataract surgery while on dabigatran, any risks?

Cataract surgery: while on anticoagulation therapy: this is a judgmental call amongst the ophthalmic surgeon and the anaesthesiologist. Generally for surgical procedures or spinal anesthesia, anticoagulaton needs to be discontinued before the surgery, as for Dabigatrean, 1-2 days prior to surgery and resumes after, while the clopedogrel you to hold 5 days prior to elective surgery. Again refer to the treating team ...Read more

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Does atrial fibrillation cause fainting?

Does atrial fibrillation cause fainting?

Afib cause faint?: It is unlikely but i guess possible. The most common cause of faint is "vaso vagel syncope ". This is like after standing a long time, at the sight of blood, etc. ...Read more

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Can stress cause atrial fibrillation?

Can stress cause atrial fibrillation?

Generally, not: If there is no underlying cardiac problems that may predispose one to atrial fibrillation, it would be unusual for stress to be actual cause; however stress can be the underlying to so many maladies, that one never says never. If one develops atrial fib, must look for underlying heart disease, and--even it none is found-be treated for it by cardiologist specializing in cardiac rhythm disorders. ...Read more

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Will stress cause atrial fibrillation?

Will stress cause atrial fibrillation?

May provoke: Stress alone usually doesn't cause the arrhythmia unless there is some underlying predisposition. Having said that, someone with the predisposition, can have recurrences, especially with acute stress. You should make every effort to manage with stress-reducing techniques. ...Read more

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Will hypovolemia cause atrial fibrillation?

It can: The stress of hypovolemia can trigger reflex tachycardia and atrial fibrillation, especially in a diseased heart. ...Read more

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Causes of non valvular atrial fibrillation?

Causes of non valvular atrial fibrillation?

HTN,CAD, Hyperthyroi: High blood pressure heart attacks alcohol heart defects you're born with (congenital) an overactive thyroid gland or other metabolic imbalance exposure to stimulants, such as medications, caffeine or tobacco, or to alcohol sick sinus syndrome — functioning of the heart's natural pacemaker emphysema or other lung diseases previous heart surgery viral infections stress due to pneumonia. ...Read more

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How can alcohol cause atrial fibrillation ?

How can alcohol cause atrial fibrillation ?

Excess alcohol : Heavy drinking iver time can lead to cardiomyopathy as alcohol works as a myocardial suppressant but even in smaller but usually excessive quantities it can cause atrial fibrillation due to its dehydrating and electrolyte depleting effects. This is often referred to as "holiday heart". ...Read more

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How can tyramine cause atrial fibrillation?

Vasoactive amine: Increased tyramine can cause increases in dopamine, Epinephrine & norepinephrine (particularly when taking a type of drug called an mao-inhibitor). This can result in increased blood pressure, and it can also cause abnormal heart rhythms, including atrial fibrillation. The 1st reported case of atrial fibrillation caused by tyramine was in grimsby, england, in 1987. ...Read more

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How does tyramine cause you atrial fibrillation?

How does tyramine cause you atrial fibrillation?

Vasoactive amine: Tyramine is derived from the Amino Acid tyrosine. Increased tyramine can cause increases in dopamine, Epinephrine & norepinephrine (particularly when taking an mao-inhibitor). This can result in increased blood pressure, and it can also cause abnormal heart rhythms, including atrial fibrillation. The 1st reported case of atrial fibrillation caused by tyramine was in grimsby, england, in 1987. ...Read more

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Could atrial fibrillation be caused by valerian?

Probably not: Valerian, a naturally occurring medicinal herb, has mild sedative effects but no known cardiac electrical effects. It has been used in the treatment of anxiety and insomnia among other things, but is not known to be associated with atrial fibrillation. ...Read more

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Can Hypothroidism cause atrial fibrillation?Thanks

Can Hypothroidism cause atrial fibrillation?Thanks

No: But hyperthyroidism is a common cause. Also, you mention alcohol addition and that's one of the commonest causes. Also age over 70 is a common cause (noting your age). ...Read more

Fibrillation (Definition)

Fibrillation is the rapid, irregular, and unsynchronized contraction of muscle fibers. An important occurrence is with ...Read more