Be certain to remain calm. You cannot help her if you cannot think clearly.

Begin compressions on her chest, the heel of your hand on the center of the her chest and your other hand on top of the first with your fingers interlaced. Begin compressions, 30 of them, and then tilt her head back.

Pinch her nose closed, take a normal breath, cover her mouth with yours to create an airtight seal, and then give two, one-second breaths as you watch for her chest to rise. Repeat that until help arrives.