Rowing's world governing body, Fisa, has taken steps to identify such problems, conducting compulsory heart checks before global regattas, starting with this year's junior world championships. Athletes will complete a questionnaire, a physical examination and an electrocardiogram (ECG) to uncover anomalies in rhythm and conductivity.
Athletes with a personal or inherited history of cardiac disease will face further evaluation.
The system is based on the International Olympic Committee's pre-competition health screening after research that the leading cause (more than 90 per cent) of non-traumatic sudden death in athletes is related to pre-existing heart problems. Waddell, who is now the New Zealand Olympic team's chef de mission, welcomed the move.
"The advantages of early detection so you can cope better are obvious but they also mean you never threaten ruining your campaign or anyone else's. It's up to each athlete how they handle it after that."
Waddell first suffered symptoms in a coxless four at the 1995 world championships: " "I knew for a long time I was going to have to manage it. That's the reason I didn't row at the Athens Games.
"Once diagnosed, I subjected myself to every cardiac test possible."
Dr Rob Doughty is a cardiologist at Auckland Hospital where he is leader of the heart failure service. He is also the Heart Foundation chair in heart health at the University of Auckland. He conducts athlete heart assessments with sports organisations across a range of disciplines, usually in conjunction with the doctor employed by each sport.
"The death of premier athletes is tragic but fortunately rare," Doughty says. "We conduct similar tests to what the rowing governing body is suggesting with the aim of detecting congenital heart abnormalities as well as those developed during a sporting career; nature versus nurture, if you like. We help sports bodies interpret the tests while team doctors do the bulk of the assessment. It's about taking a responsible attitude by being aware."
Football governing body Fifa is also making it part of its pre-event assessment at international tournaments.