chest compressions on him right away. >> phillips knows the odds of seaman surviving are slim. >> please save him. >> 92% of those who suffer sudden cardiac arrest outside of a hospital don't make it. seamans has now been in full arrest for close to four minutes. >> stay with me, dear god. >> he wasn't responding, wasn't breathing, didn't look at me, nothing. he was just laying there. >> if we didn't get things going quickly, he was losing brain function every second that we waited. >> dear god, jeff, stay with me. baby. >> officer michael frybarger arrives next carrying an automated external defibrillator or aed, a device used to deliver an electric shock to the heart. >> when someone's in a full cardiac arrest, their heart hasn't actually stopped. it's in what's called fibrilation, which means it's