I posted about this in anothe thread, but thought I would bring it up here. Your doctor should always be using the proper size cuff when monitoring your blood pressure. If not it could be a false reading.
http://www.plus-size-pregnancy.org/lgbpcuffs.htm#Why a Large Blood Pressure Cuff Is Needed
http://www.plus-size-pregnancy.org/lgbpcuffs.htm#Why a Large Blood Pressure Cuff Is Needed