Quantcast
issue
Read articles, including Science News stories written for ages 9-14, on the SNK website.

ALTERNATING CURRENT. An electrocardiogram's T wave, which reflects the electrical repolarization of the heart's ventricles, can vary in amplitude from one heartbeat to the next (exaggerated here, with difference indicated by green and blue lines). The alternating pattern, or alternans, suggests that a person is susceptible to sudden death from cardiac arrest. Credit: E. Roell
Found in: Biomedicine

Follow Us
blogs & columns
multimedia
Not to miss
bookshelf