Al-Ahram newspaper cited medical officials as saying doctors at a hospital in the Red Sea resort of Sharm el-Sheikh had been due to carry out the test on Sunday evening.
The report did not say why the catheter test had failed and did not give a date for any new test.
An anti-corruption agency ordered on Friday that the former former first lady be detained for 15 days to investigate charges she abused her husband’s influence for unlawful personal gain. The couple deny the charges.
She was admitted to the hospital on Friday after suffering symptoms of a heart attack.
Mubarak, who led Egypt for three decades before he was ousted on February 11 in a popular uprising, also suffered heart problems last month, which means neither can be transferred to prison as demanded by state prosecutors. Reuters