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Medicina issued since 1920

Volume 50, Issue 6, 2014

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Articles

Medicina (Kaunas) 2014; 50 (6): 340-4
DOI: 10.1016/j.medici.2014.11.010

Evaluation of left ventricular longitudinal function and synchrony after dual chamber pacemaker implantation.

Kristina Baronaitė-Dūdonienė 1
Jolanta Vaškelytė 1
Aras Puodžiukynas 1
Vytautas Zabiela 1
Tomas Kazakevičius 1
Gintarė Šakalytė 1
1 Department of Cardiology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
Keywords
Biomedical electronics
Dual chamber pacemaker
Dyssynchrony
Myocardial deformation imaging

To evaluate left ventricular (LV) longitudinal function and dyssynchrony mechanisms after dual chamber pacemaker implantation.
The speckle tracking imaging technique was used for quantification of global longitudinal function of the left ventricle and for dyssynchrony evaluation before pacemaker implantation and after 3-month follow-up. The study group consisted of 98 patients with conventional indications for dual chamber pacemaker implantation.
Speckle tracking echocardiographic methods and image postprocessing revealed impairment of global longitudinal strain and significant LV dyssynchrony derived from 12 basal and mid-septum segments usually untraceable with conventional echocardiographic methods. Despite good physical performance and ejection fraction, global longitudinal strain significantly decreased in all patients from -15.08±0.46 to -13.56±0.5 (P<0.05) as well as mitral annulus movement decreased from 11.57±2.41 to 8.46±1.74cm/s (P<0.001) and from 12.55±2.75 to 10.78±2.82mm (P<0.001). It was expected that patients with dual chamber pacemaker will develop inter- and intraventricular dyssynchrony, but our study showed that pacing lead position did not prevent from LV dysynchronisation and only changed the mechanism.
Global longitudinal strain and LV dyssynchrony assessment enables us to detect early signs of LV dysfunction. Mechanisms of dyssynchrony development will be useful for pacemaker programing choices in order to prevent further dyssynchronisation.

Received 28 May 2014, accepted 18 November 2014, available online 28 November 2014.

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Articles

Evaluation of left ventricular longitudinal function and synchrony after dual chamber pacemaker implantation.

(pages: 340-4)
Kristina Baronaitė-Dūdonienė
Jolanta Vaškelytė
Aras Puodžiukynas
et al.
Download

Medicina is a peer-reviewed monthly scientific journal of Lithuanian Medical Association, Lithuanian University of Health Sciences and Vilnius University

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