Identifying infants at risk for SIDS includes applying electrodes to an infant, receiving electrical signals from the electrodes, analyzing the received electrical signals to measure alternans of a heart of the infant, and identifying whether the infant is at risk for SIDS. A system for identifying infants...http://www.google.com.hk/patents/US7197358?utm_source=gb-gplus-share專利 US7197358 - Identifying infants at risk for sudden infant death syndrome