نتایج جستجو برای: ventricular dyssynchrony

تعداد نتایج: 156070  

Journal: :Acta Cardiologica Sinica 2013
Yi-Hsin Chan Chun-Li Wang Chi-Tai Kuo Yung-Hsin Yeh Chia-Tung Wu Lung-Sheng Wu

UNLABELLED There have been numerous studies focusing on the assessment of left ventricular mechanical dyssynchrony. These studies are diverse in their purposes, which include more effectively predicting the response to cardiac resynchronization therapy, improving the guidance of the left ventricular lead position, and better prediction of outcome in patients with heart failure. This article rev...

Journal: :the journal of tehran university heart center 0
masoumeh lotfi-tokaldany tehran heart center, tehran university of medical sciences, tehran, iran. zahra savand-roomi tehran heart center, tehran university of medical sciences, tehran, iran. ali kasemisaeid tehran heart center, tehran university of medical sciences, tehran, iran. hakimeh sadeghian tehran heart center, tehran university of medical sciences, tehran, iran.

background: several echocardiographic markers have been introduced to assess the left ventricular (lv) mechanical dyssynchrony. we studied dyssynchrony markers and the latest lv activation site in heart failure patients with and without left bundle branch block (lbbb). methods: conventional echocardiography and tissue velocity imaging were performed for 78 patients (lv ejection fraction ≤ 35%),...

Journal: :Cardiovascular Ultrasound 2005
Angel López-Candales Kaoru Dohi Navin Rajagopalan Matthew Suffoletto Srinivas Murali John Gorcsan Kathy Edelman

BACKGROUND Abnormalities in right ventricular function are known to occur in patients with pulmonary arterial hypertension. OBJECTIVE Test the hypothesis that chronic elevation in pulmonary artery systolic pressure delays mechanical activation of the right ventricle, termed dyssynchrony, and is associated with both symptoms and right ventricular dysfunction. METHODS Fifty-two patients (mean...

Journal: :the journal of tehran university heart center 0
mahdi montazeri tehran heart center, tehran university of medical sciences, tehran, iran. mehrnaz rezvanfard tehran heart center, tehran university of medical sciences, tehran, iran. ali kazemisaeid tehran heart center, tehran university of medical sciences, tehran, iran. masoumeh lotfi tokaldany tehran heart center, tehran university of medical sciences, tehran, iran. azam safir mardanloo tehran heart center, tehran university of medical sciences, tehran, iran. farzad darabi tehran heart center, tehran university of medical sciences, tehran, iran.

background : left ventricular (lv) dyssynchrony is a prevalent feature in heart failure (hf) patients. the current study aimed to evaluate the prevalence of inter and intraventricular dyssynchrony in hf patients with regard to the qrs duration and etiology. methods: the available data on the tissue doppler imaging (tdi) of 230 patients with refractory hf were analyzed. the patients were divided...

Journal: :Arquivos brasileiros de cardiologia 2011
Cláudia Drummond Guimarães Abreu Maria do Carmo Pereira Nunes Márcia Melo Barbosa Manoel Otávio Costa Rocha Antônio Luiz Pinho Ribeiro

BACKGROUND Long-term right ventricular apical pacing can cause ventricular dyssynchrony and, secondarily, neurohumoral alterations and increase in cardiac morbimortality. OBJECTIVE To analyze ventricular dyssynchrony and its effects on BNP levels in patients with pacemakers and long-term right ventricular (RV) apex pacing. METHODS Cross-sectional study of 85 patients with single or dual cha...

Journal: :Revista portuguesa de cardiologia : orgao oficial da Sociedade Portuguesa de Cardiologia = Portuguese journal of cardiology : an official journal of the Portuguese Society of Cardiology 2013
Maria João Vidigal Ferreira Rodolfo Silva Nuno Cabanelas Maria João Cunha Domingos Ramos Anabela Albuquerque Rogério Teixeira Ana Paula Moreira Gracinda Costa João Lima Luís Augusto Providência

INTRODUCTION Gated SPECT myocardial perfusion imaging (MPI) has been used to quantify mechanical dyssynchrony. Mechanical dyssynchrony appears to be related to response to cardiac resynchronization therapy. OBJECTIVE To evaluate the presence and predictors of mechanical dyssynchrony in patients with impaired left ventricular function (LVEF) ≤50%. METHODS The study included 143 consecutive p...

Journal: :Circulation. Cardiovascular imaging 2008
Chinami Miyazaki Grace Lin Brian D Powell Raul E Espinosa Charles J Bruce Fletcher A Miller Barry L Karon Robert F Rea David L Hayes Jae K Oh

BACKGROUND Various dyssynchrony indexes derived from tissue velocity and strain imaging have been proposed to predict the effectiveness of cardiac resynchronization therapy (CRT). We sought to compare the effect of CRT on dyssynchrony indexes derived by tissue velocity and strain and to determine which baseline intraventricular dyssynchrony parameters correlate with improvement in left ventricu...

Journal: :Journal of the American College of Cardiology 2006

2011
Maryam Esmaeilzadeh Hoorak Poorzand Majid Maleki Anita Sadeghpour Mozhgan Parsaee

BACKGROUND The right ventricular (RV) dyssynchrony has not been studied extensively and the existing literature has established the effect of cardiac resynchronization therapy (CRT) on the left ventricular (LV) dyssynchrony, but there is a dearth of data on the effect of CRT on the forgotten ventricle. We sought to evaluate the presence of mechanical right ventricular dyssynchrony in patients w...

2014
Michael Steinmetz Sophie-Charlotte Alt Shelby Kutty Jan M Sohns Christina Unterberg-Buchwald Thomas Paul Gerd Hasenfuss Joachim Lotz Pablo Lamata Andreas Schuster

Background Ebstein’s anomaly consists of varying degrees of tricuspid dysplasia and displacement into the right ventricular (RV) cavity, along with changes in ventricular function predominantly affecting the RV. Measuring alterations in contraction pattern and dyssynchrony may provide insights into ventricular performance in this disease. We sought to quantify right and left ventricular (RV and...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید