A lawyer for Tony Nicklinson said he contracted pneumonia and went rapidly downhill after the High Court's decision last week.
Mr Nicklinson told his lawyer that he was "totally devastated."
He died with his family beside him this morning.
More top news
As a new visitor centre opens, we've had our aerial camera out on the beautiful Clevedon Pier - take a look at these stunning pictures.
Burnham-on-Sea has failed to meet new EU standards for bathing. In recent testing the water quality fell foul of the tighter laws.
Friday will start cloudy with showers and some bright spells. Temperatures could reach 19 or 20 C but with outbreaks of heavy rain later