Around 200 young people in Carmarthenshire will have heart screenings this weekend thanks to the family of a young man who died from an undiagnosed heart condition.
Dean Mason was only 26 when he died on holiday in 2010. His family has raised funds to pay for equipment which will be used at the event, run by the charity Cardiac Risk in the Young (CRY).
Every week, 12 apparently fit and healthy people under the age of 35 lose their lives to sudden cardiac death in the UK.
[Welsh rugby league international Danny Jones](http://Danny Jones died of undetected heart condition) suffered a sudden cardiac arrest during a match last year.
His death from an undiagnosed hereditary heart condition raised calls for screening for all rugby league players.
How does the screening work?
an Electrocardiogram (ECG) is used which looks at the electrical conduction pathways around the heart
small stickers known as electrodes are placed on the chest and the wires connect to an ECG machine whilst the patient lie still
this test is painless, non-invasive and takes only a few minutes to perform
from the information on the screen, measurements are taken which give a guide to muscle thickness and size of the chambers of the heart.
The screenings this weekend will take place at Dean Mason's school Ysgol Dyffryn Taf in Whitland.
A variety of local people have signed up and all of the sessions are now fully booked.
Watch Nicola Hendy's report here: