Vice President Jagdeep Dhankhar was admitted to AIIMS in New Delhi early Sunday, after complaining of uneasiness and chest pain, sources said.
The 73-year-old was taken to the hospital around 2 a.m.
Dhankhar was admitted to the Critical Care Unit under Dr Rajiv Narang, Head of Department of Cardiology at AIIMS.
He is stable and under observation, a source said, adding a group of doctors is monitoring his condition.
Union Health Minister JP Nadda visited AIIMS to enquire about Dhankhar's condition.
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