Barcelona's Sergio Aguero takes a shot during the La Liga soccer match between Barcelona and Alaves at the Camp Nou stadium in Barcelona, Spain on Oct 30, 2021. (JOAN MONFORT / AP)

MADRID - FC Barcelona confirmed on Monday that striker Sergio Aguero will be out of action for at least three months as they try to determine the cause of the irregular heartbeat which saw him forced out of Saturday's 1-1 draw at home to Alaves.

The first team player Sergio Aguero has been subjected to a diagnostic and therapeutic process by Dr. Josep Brugada. He is unavailable for selection and during the next three months the effectiveness of treatment will be evaluated in order to determine his recovery process.

FC Barcelona

Aguero suffered a dizzy spell during the game and had to lie on the pitch holding his chest as medical staff gave him treatment before leaving the pitch.

The striker was taken to hospital, where he spent Saturday and Sunday nights.

ALSO READ: City ready to spend to replace Aguero, says chairman

"The first team player Sergio Aguero has been subjected to a diagnostic and therapeutic process by Dr. Josep Brugada. He is unavailable for selection and during the next three months the effectiveness of treatment will be evaluated in order to determine his recovery process," reported the FC Barcelona website.

The news is a huge blow to the former Atletico Madrid, who joined Barca on a free transfer from Manchester City during the summer and had recently made his first-team debut after missing the first 10 weeks of the campaign with a knee injury.

He has so far managed just 150 minutes of first-team action, scoring his first goal in Barca's 2-1 defeat to Real Madrid on Oct 24.

READ MORE: More problems for Barca as Aguero ruled out for 10 weeks

The world of football has become especially careful of possible cardiac problems, which was highlighted by the cardiac arrest suffered by Denmark international midfielder Christian Ericksen during this summer's European Championships.