The former Ajax midfielder had initially been unsure whether his condition would be life-threatening, but is now just looking forward to putting his health problems behind him.
"The heart is very important for sports and more. When you say you think that maybe you have to quit football, but now I just want to enjoy life, train and be on a football field," he told AS.
"After eleven years playing football, I never had problems with my heart. Mentally, when the doctors gave me the news, I had to go round it all. It was the worst moment of my life," he concluded.
The 27-year-old has also expressed his delight following his move from Valencia to Los Rojiblancos saying that he has a more defined role at his new club which suits him better.
"I liked the sports project of Sevilla, it is a team on the up. We have a very good squad and we can return to the Champion League. Also, I know that here I will play in midfield and at Valencia I was a wildcard," he added.