Atrial Fibrillation

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Atrial Fibrillation

 

a cardiac arrhythmia whose basis is a disturbance in atrial activity. Atrial fibrillation often occurs with heart defects, cardiosclerosis, rheumatic endocarditis, and thyrotoxicosis, but there is no generally accepted theory to explain how it develops.

A distinction is made between paroxysmal and continuous atrial fibrillation. Continuous fibrillation may be tachyrhythmic (rapid), with a pulse of 90 to 150–180 beats per minute, or bradyrhythmic (slow), in which the pulse is never more than 60–80 beats per minute. The tachyrhythmic form is associated with sensations of palpitations, pounding, general excitement, and weakness. Patients with the bradyrhythmic form usually do not sense the arrhythmia, which is often detected only by electrocardiographic examination.

Although atrial flutter arises from the same conditions as atrial fibrillation, it is distinguished from atrial fibrillation in that the number of atrial impulses reaches 300 and the pulse may be as rapid as 240–300 beats per minute. A distinction is made between regular flutter, in which every second or third impulse travels successfully from the atria to the ventricles, and irregular flutter, in which the alternation of atrial and ventricular contractions is irregular. Atrial flutter is more difficult for patients to tolerate than is fibrillation.

Cardiac arrhythmias are treated with cardiac glycosides, quinidine, Novocainamid, Inderal, Aimalin, potassium salts, cocarboxylase, and electropulse therapy.

N. R. PALEEV

References in periodicals archive ?
Less than 10 percent experience no significant improvement or a worsening of their AFib.
When one of my closest friends told me he had AFib and explained the associated increased stroke risk, I had to find a way to use my voice and get involved," said Dashow.
AFib can have a variety of symptoms, including the feeling of the heart racing or pounding, dizziness, fatigue, shortness of breath, or anxiety, and many patients with AFib may have no symptoms at all," says Dr.
Catheter Ablation an Option Even with drug treatment and electrical cardioversion, it is common for AFib to persist.
One type of procedure is known as pulmonary vein isolation (PVI) as these veins are often a source for AFib.
Even the most rigorous lifestyle--with an optimum diet and exercise plan--cannot always keep AFib at bay, and otherwise healthy middle-aged or elderly patients can develop it for reasons unknown.
3 million Americans are living with AFib, and the prevalence is expected to increase to 5.
This research is promising, as the results demonstrated better safety and effectiveness outcomes in AFib patients, not previously treated with drugs, who underwent radiofrequency ablation.
Every week we receive incredible customer letters about how Apple Watch has affected their lives, including learning that they have AFib.
Obstructive sleep apnea, a disorder in which you stop breathing for a few seconds multiple times throughout the night, can also lead to afib if it's not effectively treated.
Cardiologs is the world's most advanced cloud-based and Artificial Intelligence-powered ECG analysis solution to aid healthcare professionals in screening for arrhythmias such as AFib using ambulatory ECG monitoring recordings.
Additionally, just 36% of survey respondents were aware of the connection between AFib, a common type of arrhythmia that can cause pooling of the blood and clot formation, and stroke.