REFILE-Kuwait's emir arrives in the U.S. for medical treatment and is in a stable condition -KUNA

(Changes dateline to Kuwait)

KUWAIT, July 23 (Reuters) - Kuwait’s 91-year-old ruler Emir Sheikh Sabah al-Ahmad al-Sabah arrived in the United States on Thursday to complete his medical treatment, the state news agency reported, adding he was in stable condition.

Sheikh Sabah, who has ruled Kuwait since 2006, underwent successful surgery on Sunday, his office said this week, for an unspecified condition. (Reporting by Ahmed Hagagy, writing by Raya Jalabi, editing by Chris Reese)