Effect of activating intrinsic conduction search on left ventricular dyssynchrony in patients with conventional pacemaker
| Autor: | Leonor Garcia Rincon, Maria do Carmo Pereira Nunes, Marco Túlio Baccarini Pires, Manoel Otávio da Costa Rocha |
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| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty 030204 cardiovascular system & hematology Ventricular Dysfunction Left 03 medical and health sciences 0302 clinical medicine Heart Conduction System Internal medicine medicine Humans In patient 030212 general & internal medicine Ventricular dyssynchrony Lead (electronics) Aged Ventricular function business.industry Cardiac Pacing Artificial Stroke Volume Ultrasonography Doppler Stroke volume Middle Aged Ventricular pacing medicine.disease Echocardiography Heart failure Cardiology Female Electrical conduction system of the heart Cardiology and Cardiovascular Medicine business Algorithms |
| Zdroj: | International Journal of Cardiology. 202:615-617 |
| ISSN: | 0167-5273 |
| DOI: | 10.1016/j.ijcard.2015.09.108 |
| Popis: | Rightventricular(RV)apicalpacingcreatesanabnormalventricularactivation pattern inducing cardiac dyssynchrony, ventricular dysfunc-tion,andanincreasedmortalityrisk[1–3].Atrial-basedpacingtomain-tainatrioventricular(AV)synchronycandecreasetheincidenceofatrialfibrillation (AF), heart failure and overall mortality rates [1]. However,evenwhenAV-nodefunctionispreserved,dual-chamber(DDD)pacingoften results in frequent ventricular pacing [3]. Previous analyses linkthefrequencyofRVpacedbeatstoincreasedrisksofAFandheartfailurein patients with sinus-node disease [4].To overcome the limitations of pacing-induced asynchronouselectricalactivation,devicealgorithmshavebeendevelopedtopromotenormal AV synchrony by preserving the physiologic ventricular activa-tion sequence [2].Specifically, intrinsic conduction search (ICS) hasbeen shown to lead to a decrease in unnecessary RV pacing and itsadverse consequences on left ventricular function [5,6].Moreover,pulsegeneratorlongevityisanimportant issueinthecareof pacemaker patients [7]. One of the determinants of pacemaker lon-gevityisthe energy consumption ofthepulsegenerator,whichdependson programmable variables, including output parameters of the system(voltage and pulse width), and the frequency and percentage of pacing.A previous study using an algorithm to preserve normal AV synchrony |
| Databáze: | OpenAIRE |
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