# Blood pressure watch

1. What does it mean if systolic reading is greater than average reading?

I know systolic measures pressure in the arteries in each heart beat
2. (Original post by algebrax1)
What does it mean if systolic reading is greater than average reading?

I know systolic measures pressure in the arteries in each heart beat

Hi,

By convention, the blood pressure is quoted as two figures, both having units of mmHg (millimeters mercury). e.g. 120/80, where the systolic pressure is 120mmHg and diastolic b.p. is 80 mmHg.

The systolic blood pressure is generated by the force of contraction of heart, while the diastolic is a rebound pressure of the elastic tissue in the arterioles (medium-sized arteries) that have been stretched by the blood beating during systole bouncing back.

The difference between systolic and diastolic pressures is called pulse pressure.

PULSE PRESSURE = Systolic minus diastolic

Average pressure is edtimated as:

Ave pressure = diastolic pressure + 1/3 of pulse pressure.

From simple maths the systolic pressure is always greater than average b.p.

Hope this helps

(Ex-medic & A level Biology tutor)

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: November 2, 2016
The home of Results and Clearing

### 2,833

people online now

### 1,567,000

students helped last year
Today on TSR

### Took GCSEs this summer?

Fill in our short survey for Amazon vouchers!

### University open days

1. Bournemouth University
Wed, 22 Aug '18
2. University of Buckingham
Thu, 23 Aug '18
3. University of Glasgow