She had an emergency thrombectomy to remove the blood clot but due to the severity of the attack, she was diagnosed with heart failure.
Ms Harrison thanked the medical staff and the BHF, who have been assisting with her recovery.
She raised £250 for the charity from her hospital bed and said she wanted to do something with the second chance she had been given.
To do that, Ms Harrison started to raise awareness of the symptoms and her condition on social media.
“For me, I want to raise awareness with young people that they’re not invincible and tell them not to take life for granted,” she said.
