"I think it was a combination of Spanx and overheating and I'd had a sore jaw that day and I just felt really sick and thought I am going to go home," Keller said.
"I told my husband I feel sick and I had a sore jaw and he Googled it.
"I knew enough because I had some work with the Victor Chang foundation, that female heart attack symptoms are different to mens."
Keller said she was given the all-clear at the hospital but was kept in overnight and had to take the next day off from her WSFM breakfast show with Brendan "Jonesy" Jones.
"I had some blood tests, I had an ECG and then they gave me a CAT scan just to make sure all was well, she said.
Her overnight stay in hospital meant she had to take a rare day off work and that triggered media reports about a health scare which were unwarranted.
"It was never an emergency but it was suddenly painted as such and then (hospital) media unit said they had had a lot of calls and I started regretting going to the hospital," she said.
"The aftermath was more stressful than the event."
- AAP