It is very likely that you or someone you love is one of the 30 million people worldwide who have the 'irregularly irregular' heartbeat of atrial fibrillation. Or, it is possible that you may be among the people who do not realise they have this highly unpredictable condition, the impact of which can range from inconvenience to blackout, heart failure or stroke. An ageing population and our Western lifestyle are ensuring that the prevalence...