www.cry.ie (the website of the CRY charity)
www.irishheart.ie (the website of the Irish Heart Foundation)
www.heart.org (the website of the American Heart Association, which gives good information about the various heart conditions)
www.cardiomyopathy.org (formerly the Cardiomyopathy Association – a UK site which gives useful information about the inherited cardiomyopathies)
www.sads.org.uk (the UK website that gives information for families affected by sudden cardiac death, especially if it is due to sudden arrhythmic death syndrome or SADS).