WASHINGTON  Seeing no prospect of a bipartisan agreement on health care, Congressional Democrats said Friday that they would make another effort to pass sweeping health care legislation on their own.

If anything, Democrats said, their seven-hour meeting with President Obama and Republicans on Thursday confirmed their belief that it was futile to try to work with Republicans on a major health care bill because the philosophical differences between the parties were too profound.

Accordingly, Speaker Nancy Pelosi said, Democrats in the House and the Senate have begun work on a bill that they hope could be passed in the Senate by a simple majority.

Under the tentative plan sketched by Ms. Pelosi and other Democrats, the House would pass the health care bill approved in December by the Senate, and both chambers would approve a separate package of changes using a parliamentary device known as budget reconciliation. The legislation would revise the Senate health bill to reflect compromises between House and Senate Democrats and suggestions by Mr. Obama.