Doctor Sayre suggests that medical workers do both the breathing method and chest compressions.

VOA: special.2009.08.11

They say using the method could delay other ways to re-start breathing in the victim.

VOA: special.2010.08.17

Another increasingly popular method known as biofeedback focuses on developing breathing techniques to keep the heart rate down.

CNN: The highs and lows of the 2012 Olympic 'crying games'

Because the technique uses off-the-shelf wireless transceivers similar to those used in home computer networks, "the cost of this system will be cheaper than existing methods of monitoring breathing, " says Neal Patwari, senior author of a study of the new method and an assistant professor of electrical engineering.

ENGADGET: Researchers use wireless network to monitor breathing, could save lives