ANZ Bank's New Zealand chief executive David Hisco is taking extended sick leave and Antonia Watson, who heads retail and business banking, will take over as acting chief executive, the bank says.
In a note to ANZ's staff, Watson says Hisco's doctor says his prognosis is good so long as he slows down and takes time off to recover.
"David has told me he's keen to get back to work as soon as possible but realises how important his health is. We obviously all wish David a speedy recovery," she says.
As a result, the chief executive of ANZ's Australian parent, Shayne Elliott, asked Watson "to fill in for David on group executive meetings and have responsibilities for our business in the Pacific," she says.
"We have a great team and the second half of the financial year is going well so I'm sure we'll all keep the ship running smoothly until David returns."