How should we record the Blood pressure if the patient has Atrial Fibrillation?

• 3-5 recordings are done. It is the mean of 3-5 recordings.
• Systolic BP is recorded as the maximum audible sound at a particular level.If the difference between the two recording is less than or equal to 5mm, average of the two recordings are taken. 
• Beat to beat variation can lead to underestimation of the blood pressure.
• Blood pressure recorded after a long cycle can be falsely high.