An Adelaide mental health nurse who tried to murder his wife by repeatedly stabbing her with a $6 knife acted "without any semblance of normal human emotion", a court has heard.
George Alexander Freeman, 61, attacked Carron Wickens in December 2017 after she told him their seven-year marriage was over.
Reading her victim impact statement to the Supreme Court on Thursday, Ms Wickens, 57, said Freeman had Parkinson's disease and she believed his paranoia, jealousy and lies were a side effect of his medication.
"Despite all of this I loved you, was committed to our relationship and looking forward to a brighter future with you until I discovered you'd been cheating on me and would not be honest about it," she told Freeman, who sat in the dock.
"I ended the relationship in November 2017 exhausted by your lies and behaviours."
Ms Wickens recounted the morning of the attack, when Freeman rushed into her bedroom, closed the door and blocked her exit.
She tried to defend herself as he stabbed her multiple times but could not overcome him and thought she would die after a blow to her lung.
Freeman eventually relented and put clothing behind Ms Wickens' back, before he called her elderly father to tell him she was dead then called emergency services.
Ms Wickens sustained serious injuries to her lungs, arms, hands, shoulders and back.
"Every day my scars, which are still healing, are a horrific reminder of what you did to me," she said, adding she also lives with the psychological impact.
Prosecutor Kelly Smith told the court Ms Wickens was fortunate to survive and Freeman had shown no remorse.
Ms Smith said Freeman could have used his nursing background to help his wife but left her bleeding.
"While she lay dying on the floor, he bent down and dragged the knife through her outstretched hand in various ways, whilst she lay helpless watching," she said.
"He acted without any semblance of normal human emotion."
Ms Smith said CCTV footage showed Freeman bought the $6 knife five days before the attack, evidence it was pre-meditated.
But defence counsel Andy Ey said he made the purchase ahead of a fishing trip.
Mr Ey told the court a letter of apology written by Freeman to Ms Wickens demonstrated genuine remorse and said his health had deteriorated because of his condition.
Freeman will be sentenced in August.