Atrial Fibrillation

Also found in: Dictionary, Thesaurus, Medical, Financial, Acronyms, Wikipedia.
Related to Atrial Fibrillation: atrial flutter
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The conversion of atrial fibrillation and sinus rhythm of the two groups: After treatment, the maintenance rate of sinus rhythm and conversion rate of atrial fibrillation were obviously superior to those of the control group, and the differences between the two groups were statistically significant (P<0.05, Table-III).
While men who experienced migraine with aura had an 89% higher risk of atrial fibrillation, women with aura showed no increase in risk, compared with individuals who experienced no headache.
All were screened for atrial fibrillation, for overall thinking and memory skills, as well as dementia.
Atrial fibrillation (AF) is a common cardiac arrhythmia and is considered an important risk factor for stroke4,5.
"By 2016, the situation had changed dramatically and 75 per cent were receiving them, which highlights that GPs have become markedly better at not only identifying patients with atrial fibrillation, but also at treating these patients."
Atrial fibrillation happens when the electrical currents in the heart go haywire and the top chambers of the heart quiver or flutter.
Although atrial fibrillation is common all over the world, he said a study is presently being done to ascertain things that predispose Nigerians to this form of an irregular heartbeat as well as deaths as a result.
"These findings suggest that nut consumption or factors associated with this nutritional behavior may play a role in reducing the risk of atrial fibrillation and possibly heart failure," the authors write.
Researchers from the University of California, San Francisco, set out to test the viability of using the Apple Watch to detect signs of atrial fibrillation, which is a major cause of stroke.
Development of atrial fibrillation contributes to significant morbidity and mortality.
Recently, the relationship between stroke and atrial fibrillation has been well studied by both cardiologists and neurologists.

Full browser ?