Jacob Hague was rushing home from work when he hit and killed a motorcyclist on a Victorian highway.
The 36-year-old had been concerned about chest pains and saw a doctor, who told him to go straight to hospital.
Hague did not follow this advice, instead heading to work for a three-hour appointment that began at midday.
One hour after leaving work, rushing home so his wife could drive him to hospital, Hague struck and killed Stephen Troman on the South Gippsland Highway at Clyde, in Melbourne's southeast.
The 67-year-old retiree, who had been riding a Harley Davidson, died at the scene in October 2019.
Hague on Thursday faced the Victorian County Court, where he was sentenced to five years in prison after pleading guilty to dangerous driving causing death.
He must serve at least two-and-a-half years before becoming eligible for parole.
Judge Frances Hogan said Mr Troman, a father of three, had been enjoying the "fruits of retirement" when his life was needlessly ended by Hague's driving.
But she accepted the 36-year-old had shown deep and genuine remorse, at one point telling his father he would trade his own life for Mr Troman's.
"My impression is that you are riddled with guilt and remorse to an almost debilitating degree," Judge Hogan said.
"You appear to be a genuinely broken man."
The court heard Hague had a family history of cardiac issues and was concerned he may have a heart attack.
Witnesses told police Hague appeared agitated, aggressive and impatient on the road prior to the crash.
"Your conduct shows you to be in an heightened state of stress and anxiety," Judge Hogan said.
"But a person suffering shortness of breath should simply not be driving a car."
Hague was not speeding and had not consumed drugs or alcohol. He told another witness at the scene he never saw the motorbike coming.
A reconstruction expert said Hague should have had about 200m of sight down the highway.
"I cannot explain why (Hague) failed to give way to the motorcycle," he said.
