Mr Lamb was sent to Auckland where he was asked if he would take part in a trial for a a new, untested, stent treatment that would dissolve after a few months.
After talking it over with family, Mr Lamb signed up.
The stent used in the operation was created in the US and frozen before being shipped to New Zealand.
Footage of the surgery was sent live to the research facility in America where the stent was made and history was made.
Minuscule ball bearings built into the stent remain in Mr Lamb's aortic valve after the rest of the stent dissolved, to indicate where the Absorb device had once been.
Within two days, Mr Lamb was back retrieving his mail like nothing had happened.
Aside from six months of taking post-operative medication, Mr Lamb said it was if his angina had not existed.
Nearly 2000 patients in more than 30 countries have since received the stent.
The treatment is publicly funded in New Zealand.