Kamla Advani, the wife of BJP veteran L K Advani, died on Wednesday at the All India Institute of Medical Sciences (AIIMS) due to heart failure.
Sources close to the family said she complained of uneasiness and breathlessness and was rushed to the AIIMS where doctors tried to revive her but in vain.
"She suffered cardiac arrest," they told PTI.
Kamla Advani (83) leaves behind, besides her husband, a son and a daughter.
She had been suffering from age-related problems for some time and had been using a wheelchair for the past few months. Family sources said she was also suffering from memory loss.
Prime Minister Narendra Modi took to Twitter to express his condolences.
Deeply pained & saddened by Kamla Advani ji's demise. She always inspired & motivated Karyakartas & was LK Advani ji's pillar of strength.— Narendra Modi (@narendramodi) April 6, 2016
I recall my many interactions with Kamla Advani ji. My thoughts are with the Advani family in this hour of grief. May her soul rest in peace— Narendra Modi (@narendramodi) April 6, 2016
(With PTI inputs)