President Michael D Higgins is to remain in hospital over the weekend.
The 82-year-old took unwell at Áras an Uachtaráin on Thursday and was admitted to St James’s Hospital in Dublin.
He underwent tests and the initial results have been described as “positive”.
It has been reported that a discussion was held about discharging the president on Friday, but a decision was made for him to remain in hospital over the weekend as a precaution.
“President Michael D Higgins has thanked the public for the outpouring of well wishes which he has received since his admission to St James’s Hospital yesterday evening and would like to express his deep appreciation to all those who have sent messages to him, as well as to the medical staff for their continuing care,” a statement said on Friday.
“Following tests which were carried out after his admission, the president will remain in hospital over the weekend in order to monitor his blood pressure.
“It is anticipated that the president will return to Aras an Uachtarain early next week.”
A spokesperson had previously said on Thursday that he was “in excellent spirits and has thanked the medical staff for the care he has received”.
President Higgins had been due to host an afternoon tea reception at his official residence on Friday, and was also expected to attend the FAI Women’s President’s Cup on Saturday.