For the past several years, cardiologists have been beating the drum for lower blood pressure.  We have all seen the studies and/or articles that have challenged the notion that the old cut-off of 140/90mmHg is too high for diagnosing high blood pressure.  The medical community even went so far as to coin the new term "pre-hypertension" to describe individuals with a  blood pressure over 120/80mmHg.  Now, a review of data from an old study could change a few minds - there may a limit to the...