Benny Behanan complained of severe chest pain in the early hours of Friday.
Senior Congress leader and UDF candidate for Chalakudy Lok Sabha constituency in Kerala, Benny Behanan, suffered a heart attack, party sources said. He was admitted to a hospital today, party sources added.
The 67-year old Behanan was rushed to the hospital after he complained of severe chest pain in the early hours of Friday, they said.
"He underwent angioplasty. He has been kept under 48-hour observation," his aide said.
Mr Behanan, who is also convener of the Congress-led UDF in Kerala, had filed his nomination papers as party candidate from Chalakkudy constituency on Monday.
LDF's sitting MP, Malayalam film actor Innocent, and BJP's AN Radhakrishnan are his main rivals in the April 23 Parliamentary polls.
Ernakulam district Congress Committee president TJ Vinod said the UDF leadership would make necessary arrangements to conduct the poll campaign in his absence.