Also found in: Dictionary, Thesaurus, Medical, Financial, Wikipedia.
Related to fibrillation: ventricular fibrillation


1. a local and uncontrollable twitching of muscle fibres, esp of the heart, not affecting the entire muscle. Atrial fibrillation results in rapid and irregular heart and pulse rate. In ventricular fibrillation, the heart stops beating
2. irregular twitchings of the muscular wall of the heart, often interfering with the normal rhythmic contractions



the destruction by mechanical action of the bonds between the tiny fibers (fibrils and microfibrils) making up the cell walls of plant fibers and the penetration by water of the space between the fibrils.

Fibrillation may occur both on the surface of and within the cell wall of the fibers. With surficial fibrillation fragments of fibrils and the cell wall are separated from the fibers and form a nap on the fibers. With internal fibrillation the weakening and partial destruction of the bonds between fibrils increase the flexibility and plasticity of the fibers. Internal fibrillation enables the fibers to form bonds without losing strength. Fibrillation, the main process in beating cellulose during paper production, increases the surface of the fibers and releases the hemicelluloses inside the fibers, making it possible for the hemicelluloses to take part in the formation of bonds between fibers in the sheet of paper. The splitting of the fibrils establishes conditions for improved intertwining of fibers, increasing the mechanical strength of the paper sheet yet reducing the absorbency. Rolls, conical and disk mills, and similar devices are used for fibrillation.


Ivanov, S. N. Tekhnologiia bumagi, 2nd ed. Moscow, 1970.



An independent, spontaneous, local twitching of muscle fibers.
A process in which yarn is extruded as a ribbon or a tape rather than as a fine filament.
References in periodicals archive ?
com/research/c5762c/global_atrial_fibr) has announced the addition of the "Global Atrial Fibrillation Market 2010-2014" report to their offering.
The global atrial fibrillation market is categorized into the following segments: Atrial Fibrillation Market, by Treatment Types Pharmacological Treatment Anti-Arrhythmic Drugs Anti-Coagulant Drugs Non-Pharmacological Treatment Catheter Ablation Radiofrequency Based Cryoablation Based HIFU (High Intensity Focused Ultrasound) Based Microwave Based Laser Based Maze Surgery Electric Cardioversion Atrial Fibrillation Market, by Geography North America Europe Asia-Pacific Rest of the World (RoW)
In the more than 30,000 participants with available baseline electrocardiogram data, investigators looked at the effects of baseline atrial fibrillation and factors associated with the prevalence of baseline and new atrial fibrillation.
Some of the previous studies also suggested that a daily dose of aspirin can reduce stroke risk among patients with atrial fibrillation (SN: 3/24/90, p.
Nasdaq: ABIO), a biopharmaceutical company developing genetically-targeted therapies for atrial fibrillation and other cardiovascular diseases, today announced results of analyses of atrial fibrillation and pharmacogenetic data from the BEST trial, a previously conducted Phase 3 heart failure trial involving Gencaro in 2,708 advanced heart failure patients.
The Asia-Pacific atrial fibrillation market is expected to grow at the highest CAGR on account of the rising prevalence of atrial fibrillation in China coupled with the introduction of new healthcare reforms and rapid economic development in the country.
This new observation may help in understanding the mechanism by which older women who have atrial fibrillation face such a high risk of having a stroke.
Those early findings, which the coauthors and others call "very dramatic," prompted an independent panel of scientists appointed by the National Institute of Neurological Disorders and Stroke (NINDS) to recommend halting one part of the study last November so that researchers could provide aspirin or warfarin to most participants with atrial fibrillation.
Is New Onset Atrial Fibrillation a Surrogate Marker for Heart Failure Progression?
Atrial fibrillation is a common outcome, and it adds significant cost and morbidity following pulmonary resection," Dr.
Atrial Fibrillation continues to be the most common heart rhythm disorders ailing the modern society.
A physician, patient advocate, hospital and organization(s) that have contributed significantly to the awareness of Atrial Fibrillation will be presented with the GAFA Ambassador of the Year Award by the Mayor on the day of the event.