"There's no turning back," Chavez said.
Opposition leaders claimed Friday's turnout was overwhelming.
"I saw lines that extended several blocks today. It was impressive," said opposition lawmaker Geraldo Blyde, who called last week's pro-Chavez drive "small and sullen."
Vice President Jose Vicente Rangel played down Friday's turnout, saying it was being exaggerated by opposition-aligned news media.
"They're trying to fool a lot of people using the media, but these ploys always fail," Rangel said.
The opposition also sought recalls against 34 pro-Chavez lawmakers.
Venezuela's labor ministry filed a formal complaint alleging that business owners were forcing employees to sign against Chavez. Opposition leaders accused state security forces of seizing petitions at some booths.
Election officials said they were investigating both claims.***