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Published in: Heart and Vessels 2/2016

01-02-2016 | Original Article

The association between left ventricular twisting motion and mechanical dyssynchrony: a three-dimensional speckle tracking study

Authors: Shohei Fujiwara, Kazuo Komamura, Ayumi Nakabo, Mitsuru Masaki, Miho Fukui, Masataka Sugahara, Kanako Itohara, Yuko Soyama, Akiko Goda, Shinichi Hirotani, Toshiaki Mano, Tohru Masuyama

Published in: Heart and Vessels | Issue 2/2016

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Abstract

Left ventricular (LV) dyssynchrony is a causal factor in LV dysfunction and thought to be associated with LV twisting motion. We tested whether three-dimensional speckle tracking (3DT) can be used to evaluate the relationship between LV twisting motion and dyssynchrony. We examined 25 patients with sick sinus syndrome who had received dual chamber pacemakers. The acute effects of ventricular pacing on LV wall motion after the switch from atrial to ventricular pacing were assessed. LV twisting motion and dyssynchrony during each pacing mode were measured using 3DT. LV dyssynchrony was calculated from the time to the minimum peak systolic area strain of 16 LV imaging segments. Ventricular pacing increased LV dyssynchrony and decreased twist and torsion. A significant correlation was observed between changes in LV dyssynchrony and changes in torsion (r = −0.65, p < 0.01). Evaluation of LV twisting motion can potentially be used for diagnosing LV dyssynchrony.
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Metadata
Title
The association between left ventricular twisting motion and mechanical dyssynchrony: a three-dimensional speckle tracking study
Authors
Shohei Fujiwara
Kazuo Komamura
Ayumi Nakabo
Mitsuru Masaki
Miho Fukui
Masataka Sugahara
Kanako Itohara
Yuko Soyama
Akiko Goda
Shinichi Hirotani
Toshiaki Mano
Tohru Masuyama
Publication date
01-02-2016
Publisher
Springer Japan
Published in
Heart and Vessels / Issue 2/2016
Print ISSN: 0910-8327
Electronic ISSN: 1615-2573
DOI
https://doi.org/10.1007/s00380-014-0586-4

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