A cardiac arrhythmia, also called cardiac dysrhythmia, is a disturbance in the regular rhythm of the heartbeat. Several forms of cardiac arrhythmia are life-threatening and a medical emergency. A rhythm of the heart at a rate of more than 100 beats/minute is considered a tachycardia.A more serious variety of arrhythmia is known as fibrillation. Fibrillation occurs when the heart muscle begins a quivering motion instead of a normal, healthy pumping rhythm. Atrial fibrillation is the quivering, chaotic motion in the upper chambers of the heart, known as the atria. Atrial fibrillation is often due to serious underlying medical conditions, and should be evaluated by a physician. It is not typically a medical emergency. If fibrillation occurs in the ventricles (lower chambers) of the heart, it is always a medical emergency. If left untreated, ventricular fibrillation can lead to death within minutes.

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... An arrhythmia is a disorder of the heart rate (pulse) or heart rhythm, such as beating too fast (tachycardia), too slow (bradycardia), or irregularly. ...
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Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhy ...
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Arrhythmia Symptoms

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Signs and symptoms
... A heart in atrial fibrillation doesn''t beat efficiently. It may not be able to pump an adequate amount of blood out to your body with each heartbeat, causing a drop in your blood pressure. Although s...
Source: MayoClinic

Causes
... To pump blood, your heart muscles must contract and relax in a coordinated rhythm. Contraction and relaxation are controlled by electrical signals that travel through your heart muscles. Your heart co...
Source: MayoClinic

Arrhythmia Treatment

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Complications
... Sometimes, atrial fibrillation can lead to the following complications: Stroke. In atrial fibrillation, the chaotic rhythm may cause blood to pool in your atria and form clots. If a blood clot forms, ...
Source: MayoClinic

Treatment
... Treatments for atrial fibrillation include medications and procedures to regulate heart rhythm. The goals of treating atrial fibrillation include: Restoring the heart to a normal rhythm (rhythm contro...
Source: MayoClinic

Arrhythmia Other

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Heart Center Resources
... The Cleveland Clinic Heart Center 9500 Euclid Avenue, F25 Cleveland, OH 44195 Appointments (216) 444-6697 or 1-800-223-2273 ext. 46697 www.clevelandclinic.org/heartcenter The following links were sele...
Source: Cleveland Clinic

Sudden Cardiac Death
... What is sudden cardiac death? Sudden cardiac death (SCD) is a sudden, unexpected death caused by loss of heart function (sudden cardiac arrest). SCD is the largest cause of natural death in the United...
Source: Cleveland Clinic

   

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