Aguero completed a move to Barcelona during the summer, calling time on a fruitful 10-year spell with Manchester City.
Browsing: Heart problem
His mother, Mercy Omoike, a journalist with the News Agency of Nigeria, said on Wednesday that Shalom died on Sunday evening while waiting to travel for the surgery.
Juventus have been left worrying over the future of Sami Khedira after the Germany midfielder was diagnosed with an irregular heartbeat.