GIPPSLAND South MLA Danny O'Brien is recovering in hospital after suffering what he described as "a fairly serious" heart attack on Friday night.
The 43-year-old became unwell as he was returning home from a United Dairy Farmers of Victoria conference dinner in Melbourne.
He diverted to Casey Hospital at Berwick, and was then transferred to Monash Health.
In a media statement, Mr O'Brien said the heart attack had come as a "complete surprise", as he was not overweight and had never been a smoker or heavy drinker.
"I was lucky that I recognised the symptoms and sought medical treatment quickly," he said.
Mr O'Brien said he had been advised by doctors to take time to fully recover.
"In the meantime my staff will continue to help with constituent matters, along with my Upper House colleague, Member for Eastern Victoria, Melina Bath.
"This is a good lesson for all of us, as I have discovered, there is not necessarily a 'typical' candidate for a heart attack.
"If you feel not quite right, seek help immediately."
Mr O'Brien said he was now feeling well, and expected to make a complete recovery.
On behalf of the Liberal Nationals, Nationals Leader Peter Walsh wished Mr O'Brien a swift recovery, thanking hospital staff "for taking great care of our valued Member for Gippsland South."
Mr O'Brien thanked well-wishers for their support, and hospital staff for their care.