Author/Editor		Lipar, Luka; Žižek, David
Title		Učinkovitost preddvorno-prekatne in sinhrone prekatne elektrostimulacije srca pri bolnikih s stalnimi srčnimi spodbujevalniki
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		2003
Volume		str. 43
Language		slo
Abstract		BACKGROUND. Cardiac pacemaker is a device that enables the heart to beat with its own rhythm. Right atrium and/or ventricle can be stimulated. DDD pacing system refers to dual chamber pacing and sensing with double choice of answer - inhibition or stimulation of atrium or ventricle. VDD stands for a single chamber pacing and dual chamber sensing pacing system. There is a distinctive share of implanted VDD pacemaker systems in Slovenia in comparison to other European countries. AIM. VDD pacing system is an alternative to DDD pacing system in patients with atrioventricular (AV) block and normal sinus node function. Critical point in VDD pacing system is atrial sensing which is not as reliable as with DDD pacing system due to a floating sensing electrode. In case of inappropriate atrial sensing the stimulation is no longer physiologic and asynchrony occurs. Loss of AV synchrony leads to pacemaker syndrome. HYPOTHESIS. We compared atrial sensing, ventricular stimulation threshold, AV synchrony, ventricular lead impedance and quality of life in patients with VDD and DDD pacing systems. We assume that there are differences concerning electro stimulation and hemodynamic support between VDD and DDD pacing systems. METHODS. Ninety-six patients with implanted VDD or DDD pacing system in year 2000 were enrolled prospectively into our study. Using the programator we directly measured sensing threshold in atrium and pacing threshold in ventricle. Among measured data we also evaluated AV synchrony and ventricular lead impedance. We obtained the values of noted parameters at the time of implantation from archive files at Clinical department for Cardiovascular Surgery. Patients were also interviewed with a set of questions upon which they assessed their quality of life. Obtained data was statistically analyzed with Student's t-test for independent samples or Mann-Whitney t-test for two independent samples. (Abstract truncated at 2000 characters).
Descriptors		CARDIAC PACING, ARTIFICIAL ELECTRIC STIMULATION HEART BLOCK ELECTRIC IMPEDANCE SENSORY THRESHOLDS HEART ATRIUM QUALITY OF LIFE