Mum, 35, dies of cardiac arrest leaving widower and two young children heartbroken Gemma O'Shea died suddenly in May of a cardiac arrest after missing several routine heart check-ups due to coronavirus Gemma O'Shea with her sons Finley and Mason (Image: Lee O'Shea) A devastated husband has paid tribute to his wife, and mum of two young children, who died suddenly of a cardiac arrest aged 35. Gemma O'Shea, who had a heart condition, died suddenly on May 11 after her in-person routine appointments were cancelled due to coronavirus. Her husband Lee O'Shea, who had been with Gemma for 14 years an...