I had a St. Jude's valve implanted in 2007 (aortic) and have had no real problems with the heart since then. But yesterday my cardiologist said that I need a pacemaker because my heartbeat is too slow when I sleep (more than three-second pause between beats on two occasions.) I think this is called bradycardia. (He's been monitoring it recently with an implanted monitor since I developed an irregular heartbeat although he says it is not atrial fibrillation.) Looked online and there seems to be a connection between need for a pacemaker in about 15 to 20 percent of people who had valve replacement. Anybody heard about this?