A Pennsylvania teenager saved her grandfather's life, thanks to her CPR training. 

April 1 is a day 16-year-old Layla Gallagher will never forget. 

"I asked my gram what's going on, she said [my grandfather had] been struggling with indigestion all day, and I'm like, oh, OK, whatever," Gallagher told WNEP. 

When Layla walked into her grandparents' house in Avis, Penn., after grabbing food with her grandmother and sister, her grandfather wasn't in his usual chair.

"I looked over, and he was laying there in the laundry room," Gallagher said. "I bolted back outside, and I open the door, and I yelled Pap's down, get in here, slammed the door, and I ran inside calling 911, and he was unconscious."

Gallagher immediately started chest compressions on her grandfather until paramedics showed up and took him to the hospital. 

Ken Leitch, Gallagher's grandfather, had a 100% blockage in his left artery and spent a week in a medically induced coma while intubated in the hospital. He woke up almost a week after his heart attack.

"As far as I can remember, giving her a hug, and telling her I love her, and we both cried," Leitch said.

Leitch served in the U.S. Air Force for 24 years and as a volunteer firefighter at Station 8 Fire Hall for 50 years, saving lives. It seems to be a family trait: Gallagher was honored for her bravery and heroic actions at a recent Clinton County Commissioners' meeting.

"I just cried, and I went up there, and my grandmother went up there as well, and we cried together," Gallagher said. "It was just a very emotional thing."

Gallagher said she wants to be a trauma nurse and was in her last week of studying to become CPR certified when she used her skills to help save her grandfather's life.

"I never knew I would need it this early in my life, but I am so glad that I took it because without it, I would not have my grandfather here, and he's such a big part of my life," she said.

"If you have a chance to take it, take it; everybody should at least do it. It could be a lifesaver," Leitch said.

Once Leitch's heart is fully healed, the 66-year-old plans to get another stint in his right artery.