Jonathon Niese expects to undergo a minor surgical procedure during the All-Star break to correct a heartbeat that occasionally becomes irregular. The Mets left-hander came away from an examination with team doctors satisfied he had no significant heart issue on Monday. Niese was pulled from Sunday's game against the Cardinals after tossing six scoreless innings as a precaution because he experienced a rapid heartbeat. He also was forced from a June 25, 2011 game at Texas, with comparable symptoms. Niese doesn't expect to miss any starts following next month's procedure. "It's an 'ablation,' they call it," he said. "They go inside the heart and they crimp something of some sort -- like the cause of it. It's like an outpatient thing that they do that it only takes like three days to recover from after that. So that's why I think we might be doing it All-Star break. That way I don't miss any starts."