"It's a complex issue because there's issues around our cath labs because of the number we have, the hours of operation, and turnaround times."
Waikato District Health Board has two catheterisation labs, which process test results, , and outsources work to a third because of the demand.
Mrs Adams said access to beds at Waikato Hospital was a problem because cardiology was an acute service with growing demand ... "
So far, the team have managed to get between 33 per cent and 59 per cent of patients treated within the 72-hour timeframe.
The lower figures took in the Christmas and New Year period when the number of patients rose dramatically because of reduced availability of GPs.
"We're averaging around 55 to 59 per cent," Mrs Adams said.
Senior cardiologists nationally set a target of 80 per cent but for now the project would aim for 70 per cent within the next 15 to 18 months, then build up to 80 per cent "because it doesn't just happen overnight".