Michael F. DeMaio was charged with criminal attempted murder and first-degree assault of his wife, nutritionist Diane DeMaio, police said.
The couple had a dispute in their home at 261 Round Hill Road, which escalated to the point where Demaio assaulted his wife, according to the police statement.
She was in critical condition at Stamford Hospital on Wednesday morning, police said.
DeMaio was arraigned in Stamford Superior Court on Wednesday morning.
According to a Greenwich Time report, DeMaio apparently confessed the crime to Greenwich Police officers, saying he "lost it."
This story is an update of a story posted earlier on Wednesday.
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