Many of you reading this blog have high blood pressure. If you don’t, then you are in that small category of
people in India that do not suffer from the problem.
Aptly called the ‘silent
killer’, high blood pressure affects many individuals across India and carries
a great deal of mortality and morbidity. If you have been diagnosed with high
blood pressure, your doctor will prescribe for you certain medications that will
not only help control the BP but will also reduce your chances of developing
complications in the future.
High blood pressure is associated with heart
disease, stroke, kidney disease and eye disease in addition to a number of
other medical problems. Making sure that you follow the right lifestyle changes
such as salt reduction and regular exercise are paramount to achieving adequate
control.
An important aspect of management
of BP is monitoring it at home. Numerous BP measuring devices are now available
on the market and are quite accurate when compared to what your doctor measures
in their clinic. It is therefore advisable to own one of these machines at home
if you have high blood pressure as they can be invaluable in times of need
especially if you are calling the doctor for advice.
However, there are certain
aspects of checking the BP at home that you need to be aware of so that the
reading you obtain is as accurate as possible. Here are some simple steps that
can guide you on how to check your blood pressure correctly.
1. Don't drink a
caffeinated beverage or smoke for at least 30 minutes before the test. Doing so
can affect the BP recordings.
2. Sit quietly for five
minutes before the test begins. If possible, do not talk to anyone and just
close your eyes and concentrate on your breathing.
3. During the
measurement, sit in a comfortable chair with your feet on the floor and your
arm supported so your elbow is at about the level of your heart.
4. The inflatable part of
the cuff should cover at least 80% of your upper arm, and the cuff should be
placed directly on the skin, not over any clothing. Make sure that the tubing
that accompanies the cuff is placed over the inner aspect of the forearm so
that it falls upon the brachial artery. The BP that is recorded is that of the
brachial artery.
5. Don't talk during the
measurement. When the machine is inflating the cuff, do not look at the
readings as this can sometimes cause a slight amount of stress. This can
falsely increase the BP which could get you even more stressed!
6. Have your blood
pressure measured twice, with a brief break in between. It is recommended that
you wait around 10 minutes before the next reading. If the readings are
different by 5 points or more, have it done a third time. If you wish to, you
may take an average of the three readings.
When recording the BP at home, it
is important to bear in mind that there will be a slight difference between the
machine readings and one which your doctor gets in the clinic.
Currently, this
is a well-known fact by the medical authorities and it is often assumed that a
small difference between the manual readings and the machine readings is
acceptable.
In fact, a difference of about 10 mmHg either way would be regarded
as acceptable. If you find that multiple readings that have been taken over a
space of time are always elevated, it is advisable to contact your doctor to
get further advice.
It is not uncommon for BP
recordings to fluctuate throughout the day. BP readings may be high prior to
taking medicines and may settle after taking medicines.
There is no clear
guideline as to when to check the BP but we often tell our patients to check it
at least two hours after they have taken their medicines.
This way, we can
assess whether the medicines that have been prescribed are working effectively
or not. If the BP readings at home taken at the suggested times match the BP
readings that are obtained in the clinic, then it is safe to assume that the
medicines are working effectively and that no further adjustments are required or
necessary.
Try and maintain a diary of your BP either on your phone or in a scribble
pad. Use this diary to also record your day-to-day activities and dietary
patterns.
Show this to your doctor every time you visit them. It will help
guide them on further management. Use an approved device that has a good
reputation and review online.