x Turn on thread page Beta
 You are Here: Home >< A-levels

# Heart Rate from Pressure-Time Graph. watch

1. Hi, how do you calculate the heart rate in beats per minute from a graph of pressure-time. the graph contains several curves (of aorta, left ventricle, left atrium). Could anyone give an example/the formula of how to calculate it?

Thanks
2. work out the time for one heart beat, so choose a point on the x axis, and find the time taken for that point to appear again ( so essencially one complete heart cycle). so it should be something like 0.8s.
divide this time by 60 to get HR in BPM.
e.g 0.8/60=75BMP
3. (Original post by Najrul Islam)
work out the time for one heart beat, so choose a point on the x axis, and find the time taken for that point to appear again ( so essencially one complete heart cycle). so it should be something like 0.8s.
divide this time by 60 to get HR in BPM.
e.g 0.8/60=75BMP

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: February 28, 2018
Today on TSR

### Happy St Patrick's day!

How are you celebrating?

### Stay at sixth form or go to college?

Discussions on TSR

• Latest
Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE