What Affects the Test
Reasons you may not be able to
have the test or why the results may not be helpful include:
- You have poor hearing or eyesight. An
electronic arm- or wrist-cuff model may be a better choice for
you.
- You cannot put the cuff on or twist the dial to inflate the
cuff.
- The cuff is either too large or too small for your
arm.
Blood pressure normally goes up and down from day to day
and even from minute to minute, depending upon how active you are, whether you
are standing up or sitting down, and what medicines you are taking. Other
things that can change blood pressure include being too hot or too cold,
whether you have recently eaten, and whether you are relaxed or feeling
stressed.
Home blood pressure monitoring works best when you also
record your daily activities, such as the time you take medicine if you feel
upset or stressed, in a diary. This can help explain changes in your blood
pressure readings and help your doctor adjust your medicines.
Your
blood pressure may only be high when you go to your doctor's office. This is
called
white-coat (or office) hypertension and may be caused
by stress about seeing your doctor. When you regularly check your blood
pressure at home, you may find that your blood pressure is lower when you are
not at the doctor's office.