Dikshit, 75, arrived at the Fortis Escort Heart Institute hospital at around 3pm and stayed there for nearly four hours during which a number of tests were carried out on her.
"She visted the hospital for a check-up and she is fine," a close aide of Dikshit said.
"She underwent some preventive tests," said the source claiming she had come for a routine medical check up.
The Chief Minister had undergone an angioplasty procedure in November last year at the hospital after blockage was found in one of her arteries. A stent was put in the right artery of Dikshit.