Atrial Fibrillation

• No P waves
• No flutter waves
• Atrial activity is either absent or is chaotic both in amplitude and in rate
• The QRS complexes have the form which is usual for the subject and lead (ie if they had RBBB before they still have it)
• The R-R interval is variable. During a given period of observation a maximum and a minimum R-R interval will be observed and with in these extremes the R-R interval will be unpredictable