When giving rescue breaths to an infant you should give 1 breath every how many seconds?

The standard when the heart has stopped is to first blow twice then press the heart 30 times in 15 seconds (twice per second), then blow two times, and repeat with 30 compressions. The two important things are: Remember that the heart-rate of infants is high, thus the quick pressing on the chest and remember not to inflate with more air than a mouthful. You may check this with your hand. If you breath in too much, a lung could rupture or the stomach is filled with air.