(WEAU) - Every 30 seconds, someone dies from heart disease, according to the American Heart Association.

That was almost the case for one 61-year-old man last November until one good Samaritan stopped to save him.

Nearly a year ago, a stranger stopped to help Sara Berg change a flat tire along the side of a highway.

Moments later dash cam video shows that same stranger had heart attack.

"Noticed their truck was pulled over, and I thought maybe they needed some help maybe they forgot their tools or something so I pulled over and just as I did I noticed his wife were outside of their car waving her arms frantically for help,” said Sara Berg, Eau Claire good Samaritan.

She then performed CPR. Then two state troopers showed up with a defibrillator and shortly after Mayo Clinic Health System landed a helicopter nearby.

"His cardiologist told me that if it wasn't for my quick response with CPR and with officers having that AED there as quickly as they did have. The gentleman wouldn't have lived,” said Berg.

The American Heart Association says heart disease is common which is why awareness walks are important.

"One in three people are affected by cardiovascular disease and that's why the American Heart Association really has these heart walks in communities throughout the nation to spread that awareness for people,” said Cheryl Fahrner, American Heart Association.

According to the American Heart Association, if you do an activity such as brisk walking for an hour, then you can bring two hours back into your life and lower your risk for heart disease.

Sara says she's used CPR in more than one situation. She used it once at a Border's bookstore, but only her and another woman knew CPR and wanted to help.

"It's a simple thing to do and just a little bit to learn and just to make such a difference for people is huge,” said Berg.