Pacemakers (PM) are designed to prevent the ... parameter improvement in patients treated with DDD, when compared with VVI in patients who had an intact atrial rhythm. Maintenance of AV synchrony ...

The UK-PACE findings come at a time when the United Kingdom has seen a marked drop in single-chamber ventricular pacing for CHB. In the decade 1991 to 2001 combined VVI and rate-responsive VVI ...