نتایج جستجو برای: ventricular dyssynchrony

تعداد نتایج: 156070  

2016
Joy S Shome Roy Jogiya Adriana Villa Eva Sammut Divaka Perera Simon Redwood Sebastian Kozerke Sven Plein Amedeo Chiribiri

Background Perfusion dyssynchrony analysis provides a novel insight into the evaluation of myocardial ischaemia due to coronary artery disease (CAD). Perfusion dyssynchrony indices measure differences in the temporal distribution of the wash-in of contrast agents across the left ventricular wall. In a previous 2D study the temporal dyssynchrony of LV perfusion was measured using four indices va...

2014
Wei Hu Qing-yan Zhao Sheng-bo Yu Bin Sun Liao Chen Sheng Cao Rui-qiang Guo

BACKGROUND The purpose of this study was to investigate whether transcatheter renal sympathetic denervation (RSD) interfere with the development of left ventricular (LV) mechanical dyssynchrony during the progression of heart failure (HF). METHODS Nineteen beagles were randomly divided into sham-operated group (six dogs), control group (seven dogs), and RSD group (six dogs). Sham-operated gro...

2016
Laurent Fauchier Jean Paul Fauchier

OBJECTIVES The study evaluated the prognostic value of interventricular and intraventricular dyssynchrony in idiopathic dilated cardiomyopathy (IDC). BACKGROUND Biventricular pacing is an emerging treatment for patients with dilated cardiomyopathy and ventricular dyssynchrony. The prognostic values of interventricular and intraventricular dyssynchrony have not been previously compared. METHODS ...

Journal: :JACC. Cardiovascular imaging 2009
Bouchra Lamia Masaki Tanabe Hyung Kook Kim Lauren Johnson John Gorcsan Michael R Pinsky

OBJECTIVES We hypothesize that left ventricular (LV) segmental dyssynchrony, quantified by paradoxical systolic wall thinning, determines changes in global LV performance in a model of canine right ventricular (RV) pacing-induced dyssynchrony and the response to cardiac resynchronization therapy (CRT). BACKGROUND Quantification of LV dyssynchrony is important to assess the impact of CRT. ME...

2014
Barbara Naegeli Hans-Peter Brunner-La Rocca Christine Attenhofer Jost Anja Fah-Gunz Dominik Maurer Osmund Bertel Christoph Scharf

BACKGROUND The aim of the study was to prove the concept that correction of established parameters of dyssynchrony is a requirement for favorable long-term outcome in patients with cardiac resynchronization therapy (CRT), whereas patients with persisting dyssynchrony should have a less favorable response. METHODS After CRT implantation and optimization of dyssynchrony parameters, we evaluated...

2016
Linyuan Jing Gregory J. Wehner Jonathan D. Suever Richard J. Charnigo Sudad Alhadad Evan Stearns Dimitri Mojsejenko Christopher M. Haggerty Kelsey Hickey Anne Marie Valente Tal Geva Andrew J. Powell Brandon K. Fornwalt

BACKGROUND Patients with repaired tetralogy of Fallot (rTOF) suffer from progressive ventricular dysfunction decades after their surgical repair. We hypothesized that measures of ventricular strain and dyssynchrony would predict deterioration of ventricular function in patients with rTOF. METHODS A database search identified all patients at a single institution with rTOF who underwent cardiov...

Journal: :JACC. Cardiovascular imaging 2011
Nee Scze Khoo Jeffrey F Smallhorn Sachie Kaneko Kimberly Myers Shelby Kutty Edythe B Tham

OBJECTIVES This study sought to examine the changes in ventricular function of hypoplastic left heart syndrome (HLHS) between the first 2 stages of surgical palliation. BACKGROUND The mortality risk between first and second stages of surgical palliation in HLHS remains high. Right ventricular (RV) dysfunction predicts mortality. Postulated mechanisms include a maladaptive contraction pattern,...

Journal: :European heart journal cardiovascular Imaging 2014
Shu-Juan Li Hong-Kui Yu Sophia J Wong Yiu-Fai Cheung

AIMS This study sought to explore right (RV) and left ventricular (LV) mechanics and ventricular-ventricular interaction in adolescents and young adults late after percutaneous balloon pulmonary valvoplasty (PBPV) for valvar pulmonary stenosis (PS). METHODS AND RESULTS Potential late effects of PS despite PBPV on cardiac mechanics have not been well defined. Thirty-one patients aged 20.2 ± 7....

Journal: :European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2008
Jeroen van Dijk Pieter A Dijkmans Marco J W Götte Marieke D Spreeuwenberg Cees A Visser Otto Kamp

BACKGROUND A left bundle branch block (LBBB) affects both global left ventricular (LV) function and mechanical dyssynchrony. The aim was to evaluate global LV function and mechanical dyssynchrony with real-time 3D echocardiography (RT3DE), in asymptomatic LBBB patients, healthy volunteers and patients with symptomatic heart failure (HF) and a LBBB. Furthermore, the relation between presence or ...

Journal: :Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology 2008
Andi E Albertsen Jens C Nielsen Steen H Poulsen Peter T Mortensen Anders K Pedersen Peter S Hansen Henrik K Jensen Henrik Egeblad

AIMS We aimed to investigate whether biventricular (BiV) pacing minimizes left ventricular (LV) dyssynchrony and preserves LV ejection fraction (LVEF) as compared with standard dual-chamber DDD(R) pacing in consecutive patients with high-grade atrio-ventricular (AV) block. METHODS AND RESULTS Fifty patients were randomized to DDD(R) pacing or BiV pacing. LVEF was measured using three-dimensio...

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