keyword
MENU ▼
Read by QxMD icon Read
search

dyssynchrony

keyword
https://www.readbyqxmd.com/read/28929532/the-impact-of-left-ventricular-deformation-and-dyssynchrony-on-improvement-of-left-ventricular-ejection-fraction-following-radiofrequency-catheter-ablation-in-wolff-parkinson-white-syndrome-a-comprehensive-study-by-speckle-tracking-echocardiography
#1
Tomoo Nagai, Akira Hamabe, Junko Arakawa, Hirotsugu Tabata, Toshihiko Nishioka
PURPOSE: The purpose of this study was to evaluate left ventricular (LV) deformation and LV dyssynchrony in patients with Wolff-Parkinson-White (WPW) syndrome and to identify the factors that affect the efficacy of radiofrequency catheter ablation (RFCA). METHODS: Thirty patients (26 men, mean age 40 ± 12 years) with WPW syndrome were prospectively recruited for this study. They underwent 2-dimensional transthoracic echocardiography with speckle tracking analysis before RFCA and again within 48 hours after RFCA...
September 19, 2017: Echocardiography
https://www.readbyqxmd.com/read/28928601/early-right-ventricular-apical-pacing-induced-gene-expression-alterations-are-associated-with-deterioration-of-left-ventricular-systolic-function
#2
Haiyan Xu, Xiongwei Xie, Jiangjin Li, Yuanyuan Zhang, Changsong Xu, Jing Yang
The chronic high-dose right ventricular apical (RVA) pacing may have deleterious effects on left ventricular (LV) systolic function. We hypothesized that the expression changes of genes regulating cardiomyocyte energy metabolism and contractility were associated with deterioration of LV function in patients who underwent chronic RVA pacing. Sixty patients with complete atrioventricular block and preserved ejection fraction (EF) who underwent pacemaker implantation were randomly assigned to either RVA pacing (n = 30) group or right ventricular outflow tract (RVOT) pacing (n = 30) group...
2017: Disease Markers
https://www.readbyqxmd.com/read/28924738/phase-dyssynchrony-and-123-i-meta-iodobenzylguanidine-innervation-imaging-towards-standardization
#3
EDITORIAL
Kenichi Nakajima, Koichi Okuda, Hein J Verberne
No abstract text is available yet for this article.
September 18, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28878848/quantification-of-contraction-synchronicity-and-contraction-work-in-coronary-artery-disease
#4
Takanaga Niimi, Mamoru Nanasato, Hisatoshi Maeda
PURPOSE: This study quantified the contraction synchronicity (CS; with 100% representing full synchrony and -100% dyssynchrony) and contraction work (CW, millijoules per centimeter squared; representing myocardial area) in patients with reduced left ventricular ejection fraction (LVEF) associated with coronary artery disease (CAD). METHODS: CS, CW and LVEF in 104 subjects (54 CAD patients and 50 control subjects without CAD) were measured using rest electrocardiography-gated single-photon emission computed tomography (ECG SPECT)...
September 2017: Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28877886/pulmonary-right-ventricular-resynchronization-in-congenital-heart-disease-acute-improvement-in-right-ventricular-mechanics-and-contraction-efficiency
#5
Jan Janoušek, Jan Kovanda, Miroslav Ložek, Viktor Tomek, Pavel Vojtovič, Roman Gebauer, Peter Kubuš, Miroslav Krejčíř, Joost Lumens, Tammo Delhaas, Frits Prinzen
BACKGROUND: Electromechanical discoordination may contribute to long-term pulmonary right ventricular (RV) dysfunction in patients after surgery for congenital heart disease. We sought to evaluate changes in RV function after temporary RV cardiac resynchronization therapy. METHODS AND RESULTS: Twenty-five patients aged median 12.0 years after repair of tetralogy of Fallot and similar lesions were studied echocardiographically (n=23) and by cardiac catheterization (n=5) after primary repair (n=4) or after surgical RV revalvulation for significant pulmonary regurgitation (n=21)...
September 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28870355/mechanical-ventilation-state-of-the-art
#6
REVIEW
Tài Pham, Laurent J Brochard, Arthur S Slutsky
Mechanical ventilation is the most used short-term life support technique worldwide and is applied daily for a diverse spectrum of indications, from scheduled surgical procedures to acute organ failure. This state-of-the-art review provides an update on the basic physiology of respiratory mechanics, the working principles, and the main ventilatory settings, as well as the potential complications of mechanical ventilation. Specific ventilatory approaches in particular situations such as acute respiratory distress syndrome and chronic obstructive pulmonary disease are detailed along with protective ventilation in patients with normal lungs...
September 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28866441/cardiac-magnetic-resonance-evaluation-of-left-ventricular-myocardial-strain-in-pulmonary-hypertension
#7
Kimberly Kallianos, Gabriel C Brooks, Kanae Mukai, Florent Seguro de Carvalho, Jing Liu, David M Naeger, Teresa De Marco, Karen G Ordovas
RATIONALE AND OBJECTIVES: We investigated the feasibility of detecting left ventricular (LV) cardiac magnetic resonance (CMR) strain abnormalities using feature-tracking in patients with pulmonary hypertension (PH). MATERIALS AND METHODS: CMR was performed in 16 patients with all groups of PH and in 13 controls. Global and regional peak circumferential strains (%) (which have been shown to be robust by CMR), peak diastolic strain rate (%/s), and dyssynchrony index (ms) were quantified with feature-tracking software...
August 30, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28845234/a-review-of-image-guided-approaches-for-cardiac-resynchronisation-therapy
#8
Haipeng Tang, Shaojie Tang, Weihua Zhou
Cardiac resynchronisation therapy (CRT) is a standard treatment for patients with heart failure; however, the low response rate significantly reduces its cost-effectiveness. A favourable CRT response primarily depends on whether implanters can identify the optimal left ventricular (LV) lead position and accurately place the lead at the recommended site. Myocardial imaging techniques, including echocardiography, cardiac magnetic resonance imaging and nuclear imaging, have been used to assess LV myocardial viability and mechanical dyssynchrony, and deduce the optimal LV lead position...
June 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/28836949/2-dimensional-speckle-tracking-echocardiography-predicts-severe-coronary-artery-disease-in-women-with-normal-left-ventricular-function-a-case-control-study
#9
Ryan T Hubbard, Maria C Arciniegas Calle, Sergio Barros-Gomes, Joyce A Kukuzke, Patricia A Pellikka, Rajiv Gulati, Hector R Villarraga
BACKGROUND: Women who have coronary artery disease (CAD) often present with atypical symptoms that may lead to misdiagnosis. We assessed strain, systolic strain rate and left ventricular dyssynchrony with 2- dimensional- speckle tracking echocardiography to evaluate its use as a non-invasive method for detecting CAD in women with normal ejection fraction compared with healthy women controls with a normal angiogram. METHODS: We included 35 women with CAD confirmed by coronary angiography and a positive exercise stress echocardiography and 35 women in a control group with a low pretest probability of CAD, normal angiogram and a normal stress echocardiography with normal EF...
August 24, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28833528/intraoperative-assessment-of-transient-and-persistent-regional-left-ventricular-wall-motion-abnormalities-in-patients-undergoing-coronary-revascularization-surgery-using-real-time-three-dimensional-transesophageal-echocardiography-a-prospective-observational
#10
Neelam Aggarwal, Koniparambil P Unnikrishnan, Indranil Biswas, Jayakumar Karunakaran, Puthuvasseri R Suneel
OBJECTIVE: To evaluate the feasibility of intraoperative real time three-dimensional echocardiography (RT3DE) for identification and quantification of transient and persistent regional wall motion abnormalities (RWMAs) in patients with ischemic cardiomyopathy undergoing coronary artery bypass grafting (CABG). DESIGN: A prospective observational study SETTING: Single-center study in an academic tertiary care hospital PARTICIPANTS: A series of 42 patients undergoing elective CABG over a 2-year period were included...
August 22, 2017: Echocardiography
https://www.readbyqxmd.com/read/28808889/interactions-between-myocardial-sympathetic-denervation-and-left-ventricular-mechanical-dyssynchrony-a-czt-analysis
#11
Alessia Gimelli, Riccardo Liga, Francesca Menichetti, Ezio Soldati, Maria Grazia Bongiorni, Paolo Marzullo
BACKGROUND: A correlation between left ventricular (LV) dyssynchrony (LVD) and impaired myocardial sympathetic tone has been hypothesized. We sought to assess the interactions between regional LV sympathetic innervation, perfusion, and mechanical dyssynchrony. METHODS: Eighty-three patients underwent evaluation of LV perfusion and sympathetic innervation on (99m)Tc-tetrofosmin/(123)I-metaiodobenzylguanidine ((123)I-MIBG) imaging. The summed rest score and summed (123)I-MIBG score (SS-MIBG) were computed...
August 14, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28802791/difference-in-inspiratory-flow-between-volume-and-pressure-control-ventilation-in-patients-with-flow-dyssynchrony
#12
Juan B Figueroa-Casas, Ricardo Montoya
PURPOSE: Flow dyssynchrony is common during volume control ventilation but minimized during pressure control. Characterizing inspiratory flow during pressure control breaths can inform adjustments of the fixed flow of volume control to address flow dyssynchrony. This study compared inspiratory flow peak and pattern between volume control and adaptive pressure control breaths. MATERIAL AND METHODS: Subjects with or at risk for ARDS were ventilated with volume control decreasing ramp flow at different tidal volumes and subsequently with adaptive pressure control targeting those same tidal volumes...
August 5, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28801203/echocardiographic-prediction-of-cardiac-resynchronization-therapy-response-requires-analysis-of-both-mechanical-dyssynchrony-and-right-ventricular-function-a-combined-analysis-of%C3%A2-patient-data-and-computer-simulations
#13
Wouter M van Everdingen, John Walmsley, Maarten J Cramer, Iris van Hagen, Bart W L De Boeck, Mathias Meine, Tammo Delhaas, Pieter A Doevendans, Frits W Prinzen, Joost Lumens, Geert E Leenders
BACKGROUND: Pronounced echocardiographically measured mechanical dyssynchrony is a positive predictor of response to cardiac resynchronization therapy (CRT), whereas right ventricular (RV) dysfunction is a negative predictor. The aim of this study was to investigate how RV dysfunction influences the association between mechanical dyssynchrony and left ventricular (LV) volumetric remodeling following CRT. METHODS: One hundred twenty-two CRT candidates (mean LV ejection fraction, 19 ± 6%; mean QRS width, 168 ± 21 msec) were prospectively enrolled and underwent echocardiography before and 6 months after CRT...
August 8, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28791621/assessment-of-dyssynchrony-by-gated-myocardial-perfusion-imaging-does-not-improve-patient-management
#14
Ran Lee, Ravi V Shah, Venkatesh L Murthy
Clinical trials have demonstrated improved outcomes with cardiac resynchronization therapy in patients with heart failure and electrical evidence of dyssynchrony. There has been intense effort at developing imaging markers of dyssynchrony with the aim of improved risk stratification. However, these efforts have not been fruitful to date. This article discusses mechanisms of cardiac dyssynchrony, reviews clinical data supporting resynchronization therapy, and addresses the lack of convincing evidence to support the use of noninvasive imaging measures of dyssynchrony in improving patient management...
August 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28781300/successful-catheter-ablation-as-a-substitute-for-cardiac-resynchronization-therapy-in-patient-with-an-accessory-pathway-induced-cardiomyopathy
#15
Keisuke Nakabayashi, Ryo Sugiura, Yusuke Mizuno, Hiroko Kato, Naomi Nakazawa, Toshiaki Suzuki, Hideki Saito, Naomi Kawakatsu, Masayuki Goto, Daichi Isomura, Hisayuki Okada, Toshiaki Oka
A 50-year-old man presented with exertional dyspnea and orthopnea. An electrocardiogram showed a delta wave and a wide QRS complex, similar to left bundle branch block. Cardiac echocardiography revealed diffuse severe hypokinesis and dyssynchrony. The patient was diagnosed with congestive heart failure. We considered that the patient's condition was caused by an accessory pathway-induced cardiomyopathy after heart failure compensation with guideline-oriented medical therapy. We therefore performed catheter ablation for right-sided pre-excitation syndrome as cardiac resynchronization therapy...
August 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28765745/rapid-and-potent-antiarrhythmic-effect-of-cardiac-resynchronization-therapy-in-a-patient-with-advanced-dilated-cardiomyopathy-and-a-large-ventricular-arrhythmia-burden
#16
Dong Sub Jeon, Jong Sung Park
We report a case demonstrating a rapid and potent antiarrhythmic effect of biventricular pacing. A 67-year-old male patient with dilated cardiomyopathy was admitted for heart failure. The initial surface electrocardiogram revealed a left bundle branch block with a QRS complex duration of 200 ms. Echocardiographic examination revealed a left ventricular ejection fraction of 16%, a left ventricular end-diastolic dimension of 91 mm, and marked interventricular dyssynchrony. Continuous rhythm monitoring revealed frequently-recurring non-sustained monomorphic ventricular tachycardia (VT)...
July 2017: Korean Circulation Journal
https://www.readbyqxmd.com/read/28762918/-noninvasive-electrophysiological-mapping-in-patients-with-complete-left-bundle-branch-block-and-different-modes-of-biventricular-pacing
#17
S V Zubarev, M P Chmelevsky, M A Budanova, M A Trukshina, T A Lyubimtseva, V K Lebedeva, D S Lebedev
OBJECTIVE: to investigate possibilities of noninvasive electrophysiological mapping (NEM) during biventricular (BiV) pacing and to compare the results with data of 12 lead ECG and tissue Doppler echocardiography (TDI). MATERIAL AND METHODS: The study included 25 patients with complete left bundle branch block (LBBB) and implanted cardiac resynchronization therapy (CRT) system. Twenty-two patients were CRT responders, three other patients did not demonstrate a clear effect...
May 2017: Kardiologiia
https://www.readbyqxmd.com/read/28753548/assessment-of-strain-and-dyssynchrony-in-normal-fetuses-using-speckle-tracking-echocardiography-comparison-of-three-different-ultrasound-probes
#18
Daniel Rolf, Rene Schmidt, Mareike Möllers, Kathrin Oelmeier de Murcia, Janina Braun, Kerstin Hammer, Walter Klockenbusch, Ralf Schmitz
OBJECTIVE: To evaluate segmental left (LV-S) and right (RV-S) ventricular strain as well as longitudinal mechanical myocardial dyssynchrony as a time difference between peaks in strain of both ventricles in fetuses (two-chamber-dyssynchrony, 2C-DYS) using speckle tracking echocardiography (STE). The aim of our study was to evaluate the influence of data acquisition on the results of STE measurement using different ultrasound probes. METHODS: We prospectively recorded cardiac cycles of four-chamber views of 56 normal fetuses with three different ultrasound probes and analyzed them offline with speckle tracking imaging software...
July 28, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28752278/predictors-and-therapy-of-cardiomyopathy-caused-by-frequent-ventricular-ectopy
#19
REVIEW
Ghaith Sharaf Dabbagh, Frank Bogun
PURPOSE OF REVIEW: The aim of this review is to describe predictors and therapeutic principles for PVC-induced cardiomyopathy. RECENT FINDINGS: PVC-induced cardiomyopathy is a treatable condition resulting in a reversible form of cardiomyopathy. PVC-induced cardiomyopathy has only recently been recognized as an entity that causes a reversible form of cardiomyopathy. The mechanism of development of PVC-induced cardiomyopathy has not yet been elucidated, although dyssynchrony appears to play a major role...
September 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28744930/what-endocardial-right-ventricular-pacing-site-shows-better-contractility-and-synchrony-in-children-and-adolescents
#20
Massimo Stefano Silvetti, Antonio Ammirati, Rosalinda Palmieri, Vincenzo Pazzano, Silvia Placidi, Lucilla Ravà, Romolo Remoli, Fabio Anselmo Saputo, Letizia Verticelli, Fabrizio Drago
AIMS: Right ventricular (RV) apical (RVA) pacing can induce left ventricular (LV) dyssynchrony, remodeling, and dysfunction in children with complete atrioventricular block (CAVB). We compared the functional outcome of RVA with RV alternative pacing sites (RVAPS), including para-Hisian, septal, and outflow tract sites. METHODS: This is a single-center, retrospective study. Data were collected before pacemaker implantation (transvenous leads), postoperatively, at 6 months, and at 1-2-3-4 years...
July 25, 2017: Pacing and Clinical Electrophysiology: PACE
keyword
keyword
2826
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"