| umls-concept:C0042510 | skos:definition | MSH: A potentially lethal cardiac arrhythmia that is characterized by uncoordinated extremely rapid firing of electrical impulses (400-600/min) in HEART VENTRICLES. Such asynchronous ventricular quivering or fibrillation prevents any effective cardiac output and results in unconsciousness (SYNCOPE). It is one of the major electrocardiographic patterns seen with CARDIAC ARREST.,CSP: arrhythmia characterized by fibrillary contractions of the ventricular muscle due to rapid repetitive excitation of myocardial fibers without coordinated contraction of the ventricle.,NCI: A cardiac rhythm characterized by rapid, usually more than 300 bpm (cycle length: 180 ms or less), grossly irregular ventricular rhythm with marked variability in QRS cycle length, morphology, and amplitude.,NCI: An arrhythmia characterized by an irregular pattern of high or low-amplitude waves that cannot be differentiated into QRS complexes or T waves. These electrocardiographic waves occur as a result of fibrillary contractions of the ventricu | lld:umls |
