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Clinical Center Niš
Bulevar Dr Zorana Đinđića 48
FLOATING ATRIAL SENSING OF THE VDD PACING SYSTEM AND ITS STABILITY
Tomislav Kostić1, Zoran Perišić1, Dragana Stanojević1, Boris Đinđić1, Lazar Todorović1, Aleksandar Stojković1, Snežana Ćirić Zdravković1, Predrag Cvetković1, Mladjan Golubović2, Dragan Zlatanović3
Centre for Anaesthesiology and Reanimation, Clinical Centre Niš, Niš, Serbia2
Clinic for Physical Medicine, Rehabilitation and Prosthetics, Clinical Centre Niš, Niš, Serbia3
In the late seventies and the early eighties, pacemakers with two electrodes able to stimulate two heart chambers (usually the right atrium and right ventricle) were de-signed. Those pacemakers were able to detect signals from the same heart chamber, and each of its functions (detection of intrinsing and application of artificial pacemaker signal) was performed as previously programmed. Essential hemodynamic improvement of this type of stimulation was the achievement of AV synchronization allowing that optimized function of the atria and ventricles mimics their natural functioning - timely contraction of the atria in relation to the AV valves and the ventricular outflow tracts.
This study included 130 patients who had VDD pacemaker implanted at the Department of Cardiology, Clinical Center Niš, during 2009-2013. At the time of implantation, atrial sensing was 2.1±1.2 mV. Patients had follow up visits at one month, six months and one year after pacemaker implantation. After one year, the floating sensing in the atrium was 1.6±0.7 mV which was lower but not clinically significant. Bearing in mind the aforementioned, VVD pacing systems may be considered as the first line therapy in patients with AV block and normal SA node function, particularly in elderly patients and in patients with unsuitable anatomical structures of musculoskeletal and venous systems of the upper thoracic part, in cases of which it is sometimes difficult to place two DDDR electrode systems. Acta Medica Medianae 2014;53(1):25-27.
Key words:: VDD pacemaker, atrial sensing