Latest Issue of Science News


Test identifies people at cardiac risk

From Chicago, at a meeting of the American Heart Association

Measurement of an electrical abnormality in the heart aids doctors in determining who is most at risk for cardiac arrest, according to a new study.

Computers can detect the abnormality, called T-wave alternans, during an electrocardiogram, a recording of the heart's electrical activity. Since T-wave alternans often precedes sudden cardiac arrest, researchers have suggested that it could be used to decide which patients need implanted defibrillators (SN: 9/23/06, p. 202: Available to subscribers at Calling Death's Bluff). Those devices sit inside the chest and deliver a therapeutic shock when the heart needs it. However, many patients get defibrillators unnecessarily.

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

This article is available only to subscribing members. Join SSP today or Log in.