Tina writes:

Readers of the group should know hypertension is commonly defined as
a blood pressure in excess of 140/90.

Well, no. The threshold has been regularly lowered. Now some people are
saying that anything above "normal," which seems to be defined as 120/80, is
hypertension.

The FAA disqualifies those with blood pressures in excess of 155 over
something.

A threshold BP of 155/95 is the FAA's suggestion.

So the universe of those disqualified by the FAA is smaller than the
universe of those who have hypertension.

Not really. If the examiner determines that the applicant is hypertensive,
he's disqualified. The examiner has a certain latitude in this determination,
so one cannot say that a person with a BP of 140/95 (which makes him
hypertensive according to some) will not be disqualified.