LAS VEGAS ( FOX5 ) — A retired Las Vegas fire captain shared his story after collapsing at home from a sudden cardiac event.

His wife, a paramedic, saved his life. Now, they’re hoping to raise awareness about how extreme heat can put added strain on the heart.

Daniel Dennson doesn’t remember the day his heart gave out.

“My symptoms would have been the neck pain and the fatigue but as far as the day itself, I have a very blurry, tidbits of thoughts for that day,” he said.

Hours after playing hockey, Dennson collapsed at home, his wife Melanie, a paramedic, ran upstairs and found him barely breathing.

“I realized he didn’t have a pulse, just muscle memory from being a paramedic for. Over 20 years, I just jumped into action and just started CPR,” Melanie said.

Daniel was placed in a c

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