Close X
Get more out of WDDTY.com
by joining the site for free
Free 17-point plan to great health
Twice weekly e-news bulletins
Access to our News, Forums and Blogs
Sign up for free and claim your
17-point plan to great health
Free 17-point plan to great health

Twice weekly e-news bulletins

Access to our News, Forums and Blogs
OR

If you want to read our in-depth research articles or
have our amazing magazine delivered to your home
each month, then you have to pay.


Click here if you're interested
Helping you make better health choices

What Doctors Don't Tell You

In shops now or delivered to your home from only £3.50 an issue!

Subscribe!
February 2018 (Vol. 28 Issue 11)

HOW WELL DO WE UNDERSTAND THE SIGNIFICANCE OF SYSTOLIC BLOOD PRESSURE READINGS?

levyacov

levyacov

12 Mar 2014 @ 22:59PM


Having been diagnosed with high blood pressure (BP) at the age of 70, I was often puzzled by the considerable variations between systolic values produced by different types of monitors (all claimed to be calibrated). The same monitors consistently produced only marginal differences between diastolic values.
This led me to question the meaning of the systolic readings and how well are they understood.
Since pressure is force per unit area, and force is defined as the change of momentum (a product of mass and velocity) with time, the shorter the pumping impulse produced by the heart, the higher the peak pressure. In fact, the theoretical pressure at the very start of the pumping action, when the blood just starts to flow, is infinite!
What is measured at the upper arm or wrist is also greatly influenced by the state of the arteries. The stiffer these are the higher the pressure will be. This is due to the fact that stiff artery walls absorb much less energy than supple ones.
And then there is the third major factor - the sensitivity / response time of the measuring instrument.. This can probably explain why, using a number of different makes / types of BP monitors, within a short period and under the same conditions, significantly different systolic BP readings can be produced.
However, what matters most is the doubt over the interpretation of systolic BP readings. How many of us are given powerful drugs aimed at lowering pressures produced by nothing other than well functioning hearts.

Latest Tweet

About

Since 1989, WDDTY has provided thousands of resources on how to beat asthma, arthritis, depression and many other chronic conditions.

Start by looking in our fully searchable database, active and friendly community forums and the latest health news.

Positive SSL Wildcard

Facebook Twitter

Most Popular Health Website of the Year 2014

© 2010 - 2017 WDDTY Publishing Ltd.
All Rights Reserved