Red Sox designated hitter David Ortiz was held overnight at Mass. General Hospital last weekend to monitor an irregular heartbeat, but the matter ultimately proved nothing more than a scare for the player and team. Prior to Thursday's game between the Red Sox and Los Angeles Angels at Angel Stadium, Ortiz confirmed an Internet item that said he was treated at Mass. General. Ortiz declined to speak at length about the matter, but did say he was admitted Saturday night for observation.