In a joint statement released on Sunday morning, the London Chest Hospital and the club said that Muamba's heart did start working again after he was carried from the pitch on a stretcher. However, the 23-year-old remains in a critical condition.
"Fabrice Muamba remains in a critical condition in intensive care in the Heart Attack Centre at the London Chest Hospital," said the statement.
"He was admitted to the hospital yesterday evening after collapsing at White Hart Lane, where he sustained a cardiac arrest during the FA Cup quarter-final against Tottenham. Fabrice received prolonged resuscitation at the ground and on route to The London Chest Hospital, where his heart eventually started working.
"As is normal practice, Fabrice remains anaesthetised in intensive care and will be for at least 24 hours. His condition continues to be closely monitored by cardiac specialists at the hospital."
Muamba was accompanied to hospital on Saturday by Bolton manager Owen Coyle and captain Kevin Davies.
Chairman Phil Gartside was also present as the club try to cope with such a harrowing incident, which led to the FA Cup game being abandoned by referee Howard Webb.
Almost certainly, Bolton's planned Premier League encounter at Aston Villa will be postponed on Tuesday as there appears no desire on the Lancashire club's part to fulfil the fixture at this stage.
"Fabrice's family have asked me to pass on their thanks for the many, many kind messages of support from not only Bolton fans but also fans from clubs across the country and abroad," said Coyle.
"All our thoughts and prayers are for Fabrice and his family at this time. The family would also like to thank the media for respecting their privacy at this time."
Source: PA
Source: PA