HONOLULU (HawaiiNewsNow) - For 21 years, Marc Moriguchi treated other people's emergencies.
While he was on the job on May 27, the Honolulu paramedic became his own 911.
"I just had really intense heartburn. And then from there I started getting really sweaty. And then the nausea," he said.
At first the 42-year-old denied he was having a heart attack. But he finally admitted it was happening to him.
"We have standing orders that we follow. If a person has a chest pain we give them aspirin, a spray of nitroglycerin. We put them on the monitor," he said. "That's exactly what I did to myself."
While his EMS partner monitored his vitals, Marc called another ambulance to rush him to the hospital. Doctors said his self-diagnosis and self-treatment saved him.
"That was the key -- recognizing it and then starting the treatment," he said.
During the crisis he had that second when life flashes.
"For that one brief moment, I was there wondering if this was going to be the last day," he said.
His recovery was fast. He went back to work, and recently went to the mainland to help victims of Superstorm Sandy.
He feels he's now a better paramedic.
"When I start asking my patients chest pain questions, I have insight on that one. I know exactly what they're going through," he said.
Marc changed his diet and started running. Sunday he tackles his first Honolulu Marathon seven months after nearly crossing another finish line.