Definition
Low blood pressure, also called hypotension, would seem to be something to
strive for. After all, high blood pressure (hypertension) is a well-known risk
factor for heart disease and other problems. In fact, in recent years there has
been an ongoing downward revision of what is considered a normal blood
pressure reading. A blood pressure less than 120/80 millimeters of mercury
(mm Hg) is now considered normal and optimal for good health.
So, it's easy to understand why you might assume the lower the better when it
comes to blood pressure. And it's true that for some people — those who
exercise and are in top physical condition — low blood pressure is a sign of
health and fitness. But that's not always the case.
For many people, low blood pressure can cause dizziness and fainting or
indicate serious heart, endocrine or neurological disorders. Severely low
blood pressure can deprive the brain and other vital organs of oxygen and
nutrients, leading to a life-threatening condition called shock.
Low blood pressure,
Symptoms
Some people with low blood pressure are in peak physical condition with strong
cardiovascular systems and a reduced risk of heart attack and stroke. But low blood
pressure can also signal an underlying problem, especially when it drops suddenly
or is accompanied by signs and symptoms such as:
Dizziness or lightheadedness
Fainting (syncope)
Lack of concentration
Blurred vision
Nausea
Cold, clammy, pale skin
Rapid, shallow breathing
Fatigue
Depression
thirst