While the elder sister Anuradha died, the younger, Sonali had to be moved into the Intensive Care Unit (ICU) on Wednesday, Apr 14 as her condition deteriorated.
Doctors at the Kailash Hospital where she is admitted said her condition was stable and she is responding to treatment.
"Her condition is stable and she is on drugs. Her body is responding to medicines, but her blood pressure was fluctuating the whole night," a doctor at the hospital said.
Sonali was diagnosed with malnutrition, dehydration and depression and her blood pressure had fallen.
The two sisters were rescued on Tuesday from their sector 29 apartment in a very bad condition after a self-confinement of six months.
Authorities have ordered a magisterial probe into the circumstances that led to the shocking case of self-deprivation by the sisters.
Vipin Behl, the brother of the two women who was not living with them for the past some years, said he had gone to Bangalore and later shifted to Gurgaon where he is currently working. Behl said he had transferred the parental property to the sisters as well as some fixed deposits.
"I had shifted to Bangalore and later came back to Gurgaon where I am working now. I had transferred the property in their names. I have also transferred some fixed deposits in their names," he had said, adding he will take care of his surviving sister and bear all expenses for her treatment.
Anuradha and Sonali were apparently disturbed since their father and mother passed away some years back and their younger brother left them. In the interim period, their pet dog also died after which they got into a state of depression.
Police had broken into the apartment after being informed by neighbours and an NGO about the women who had not come out of their home for the past several months.