fibrillating

verb

1. (form-of, gerund, participle, present)present participle and gerund of fibrillate

adj

1. Splitting into fibrils or fibres.
2. Of a muscle, especially in the heart: undergoing fibrillation; quivering.

   “A publicity plane flew along the Croisette, its pennant fluttering like the trace of a fibrillating heart, unnoticed by the sunbathers stretched in their loungers in the hotel concessions.”