James Bird, 20, from Twickenham, west London, came to the woman's aid when the train made an emergency stop and she was found unresponsive on the platform. He recognised she had gone into cardiac arrest and immediately began cardiopulmonary resuscitation (CPR) - a skill he had learned just months earlier from his mother Claire Bird, who is part of the LAS's London Lifesavers team as a community resuscitation trainer.
I became very dizzy and I collapsed. I didn't know it then, but I'd had a cardiac arrest. Fortunately, because Joe Biden was in town, there were lots of police around to do CPR and there was an armed response vehicle with a defibrillator in it. All of that was on me within a couple of minutes and that's the reason why I'm here now.
Ger Heffernan, a 46-year-old who had been in good shape following a life of athleticism, unexpectedly suffered a heart attack after a vigorous swimming session.
"We conducted an exposome-wide association study, which examines the relationship between a wide range of environmental exposures and health outcomes. The study found significant associations between various modifiable factors and SCA, with lifestyle changes being the most impactful in preventing cases."