mixture of atrial flutter (FF) waves and fibrillation (ff) waves in the electrocardiogram.
flutter-fibrillation/flut·ter-fi·bril·la·tion/ (-fĭ-brĭ-la´shun) impure flutters constantly varying in their resemblance to flutter or fibrillation, respectively.
An electrocardiographic pattern of atrial activity with features of both fibrillation and flutter.
Etymology: AS, fleotan, to move quickly; L, fibrilla, small fiber
a type of atrial fibrillation (involuntary recurrent contraction) in which the irregular fibrillatory line resembles atrial flutter mixed with atrial fibrillatory waves.
im·pure flut·ter(im-pyūr' flŭt'ĕr)
impure flutters that vary from moment to moment in their resemblance to flutter or fibrillation, respectively.