f wave
(redirected from ff waves)f wave
, ff wavesatrial fibrillation wave.
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F wave
Cardiology An atrial flutter wave on EKG, which appears as a 'sawtooth' pattern in leads II, III and aVF; less commonly, F waves are undulating, firing at a rate of 280-320/min, a rate often associated with a 2:1 block and alternating F waves merge with QRS or T waves NeurologyF response An undulation of an EMG that corresponds to the time between application of a stimulus to the axon of the α motor neuron as it propagates andromically to the anterior horn of the spinal cord, and then returns orthodromically along the same axon. See Electromyography.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.