In cardiac catheterisation laboratories, known as cath labs, they carry out some complex, high-risk procedures on the heart - things like putting in stents and pacemakers. Waikato Hospital interventional cardiologist Dr Madhav Menon says most of the time it runs like clockwork, but on rare occasions things can go wrong. "We can perforate a vessel, we can perforate an artery, we can bleed around the heart, the heart valve can rupture, your pacing wire can cause holes," Dr Menon says. "It doesn't happen often, but when it happens it is a disaster." Dr Menon helped develop a training programme t...