RIVERSIDE (CBS) — UC Riverside Chancellor Timothy P. White was recovering from emergency heart surgery Tuesday, the university announced.

White, 61, was “resting comfortably” at Riverside Community Hospital, UCR spokesman James Grant said.

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Doctors performed an emergency cardiac catheterization procedure due to a blood clot in White’s coronary artery. The chancellor had a stent placed there last week, and was admitted to the hospital Monday suffering from chest pains, Grant said.

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Dallas Rabenstein, UCR’s executive vice chancellor and provost, is serving as the school’s acting chancellor, Grant said.

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