Ventricular fibrillation is generally anything above an averagely high amount of bpm. A case of Ventricular fibrillation always differs but is consistently high because your nodes in your heart are working on overdrive to make up for potential prior damage such as a heart attack. Ventricular fibrillation may range from a high pulse rate of the upper 90s-possibly 100s to ventrical tachycardia (really fast heart rate) of a fatal 250. The pulse rate heavily depends on the individual in terms of prior exposure to heart problems, physique percentages between muscle and fat as well as nutrition which would evidently show up in blood work. Altogether I'd personally say stay away from caffeine/products that have caffeine in them. Eating a diet high in fiber will help with reducing a persons heart rate but so does the slightest amount of exercise with repetition. If you have this problem or were thinking of increasing fiber I'd say make it gradual because most bodies need to Gradually adapt to a new diet. Staying away from things like smoking and hydrogenated products will help with circulation. Best of luck!
The range of heart rate for ventricular fibrillation is around 120-300 beats per minute. This heart rate is not supposed to increase even a bit since it may cause sudden cardiac death. Find out more details at http://circ.ahajournals.org/content/122/3/e389.full.
Ventricular fibrillation is characterized by multiple uncoordinated electric discharges throughout the ventricular myocardium causing the ventricular myocardium to twitch. Although there is no defined heart rate for ventricular fibrillation, as calculated on an ECG, its usually recorded value is somewhere between 150 beats per minute to readings over 300 beats per minute. The heights of the R waves vary from beat to beat and R-R interval is irregularly irregular.