Bana suffered from poor health during the last years of his life .
Bana died in 2013 at Loures hospital in Portugal , at the age of 81 , after suffering a cardiac arrest , he had several children including Silva .
Suffering from poor health during the last years of his life , Bana died in 2013 at Loures hospital in Portugal , at the age of 81 , after suffering a cardiac arrest , he had several children including Silva .