The place marker and glass of water for US Vice President Dick Cheney sits outside the Cabinet room on October 15, 2008 at the White House in Washington, DC. Vice President Dick Cheney cancelled a planned political event and will see his doctors after experiencing a recurrence of an abnormal heart rhythm, his spokeswoman said in a statement. "During a visit with his doctors this morning, it was discovered that the vice president is experiencing a recurrence of atrial fibrillation, an abnormal rhythm involving the upper chambers of the heart," said Megan Mitchell.