Marc Overmars has suffered irreparable damage to his heart after going into cardiac arrest last month.
Overmars was admitted to hospital on 30 December last year after suffering what was described as a "mild stroke". It has now emerged that the incident was more serious, with the former Dutch international's heart only being able to pump blood at 30 per cent of its normal volume.
It is believed that Overmars, who has been discharged from hospital and is now resting at home, will require at least a year to recover. The former Arsenal star will require medication for the rest of his life.