Rebbetzin Bat-Sheva Kanievsky died in the early afternoon on Shabbat, in her home in Bnei Berak. She suffered a heart attack.
Magen David Adom emergency crews arrived and attempted to resuscitate her, but to no avail.
Rebbetzin Bat-Sheva Kanievsky was the wife of Rav Haim Kanievsky and the daughter of Rav Yosef Shalom Elyashiv, known as "the greatest posek," or halakhic decisor.
The rebbetzin's funeral will depart the Lederman Synagogue in Bnei Berak Saturday night at 10:00 p.m.
The video below shows a visit to Rav and Rebbetzin Kanievsky earlier this year, by disabled Chai Lifeline children and youths.