article_snippet.sent: Sir Ranulph Fiennes has previously suffered two heart attacks and underwent a double heart bypass in 2003 .
article_snippet.sent: Sir Ranulph Fiennes received medical treatment at the end of the fourth stage of the race yesterday because the exertion had begun to take the race toll on Sir Ranulph Fiennes heart.
article_snippet.sent: As well as a double bypass, Sir Ranulph Fiennes has previously undergone a cancer operation and is in an ongoing fight with diabetes.
article_snippet.sent: Sir Ranulph Fiennes, 71, was taken to the medical tent because of concerns for his heart .
article_snippet.sent: Sir Ranulph Fiennes, speaking after becoming the oldest Briton to complete the race, said: 'I got told by the surgeon when I had my last heart attack that I must not go over 130 heart beats a minute or undergo stress or extreme circumstances. '
article_snippet.sent: As well as a double bypass, Sir Ranulph Fiennes has undergone a cancer operation and is in an ongoing fight with diabetes .