Ansari was discharged last night from the hospital after his clinical parameters were found to be normal and he was brought back to Banda jail amid tight security, jailor Viveksheel Tripathy said.
The 55-year-old Ansari, who was lodged in Banda jail in connection with various criminal cases against him, had suffered a heart attack while he was meeting his wife in the prison here.
Reportedly, his wife too developed a chest pain during the meeting and was also referred to the hospital in Lucknow.