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Right ventricle assessment

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https://www.readbyqxmd.com/read/29783947/preexcitation-syndrome-experimental-study-on-the-electrocardiogram-of-antegradely-conducting-accessory-pathway
#1
Zhaolong Xu, Renguang Liu, Qinghua Chang, Changjun Li
BACKGROUND: Preexcitation syndrome is characterized by a dominant delta wave on the baseline electrocardiogram (ECG), resulting from the change in QRS initial vector by the accessory pathway (AP). This study is to explore the effect of ventricular preexcitation on the QRS initial, maximal and terminal vector in an experimental rabbit with preexcitation syndrome induced by programmed electrical stimulation. METHODS: Rabbits (n = 10) were randomized for the experimental model of ventricular preexcitation...
May 21, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29777281/right-ventricular-systolic-function-parameters-in-hypoplastic-left-heart-syndrome
#2
S Javed Zaidi, Jamie Penk, Vivian W Cui, Supaluck Kanjanauthai, David A Roberson
Assessment of the systolic function of the right ventricle (RV) in patients with hypoplastic left heart syndrome (HLHS) is important. The asymmetric shape and heavy trabeculations make accurate assessment of RV systolic function challenging. Novel measures of RV function could be helpful in distinguishing reduced versus preserved function in HLHS and may also be worse in HLHS with preserved function compared to normal controls. These novel methods offer promise, but research and clinical applicability is hindered as no cut-off values for normal function have been established...
May 18, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29760475/computed-tomography-for-evaluating-right-ventricle-and-pulmonary-artery-in-pediatric-tetralogy-of-fallot-correlation-with-post-operative-pulmonary-regurgitation
#3
Yue Gao, Zhi-Gang Yang, Ke Shi, Kai-Yue Diao, Hua-Yan Xu, Ying-Kun Guo
Pulmonary regurgitation (PR) is the most common complication after tetralogy of Fallot (TOF) surgical repair, and long-term PR might result in cardiovascular events. The aim of this study was to assess the influence of pre-operative right ventricle (RV) and pulmonary artery (PA) parameters assessed by dual-source computed tomography on post-operative PR. A total of 41 TOF patients who underwent trans-valve surgical repair were retrospectively recruited. The RV and PA parameters evaluated by pre-operative DSCT were compared between the PR and non-PR groups...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29756230/the-relationship-between-pulmonary-artery-wedge-pressure-and-pulmonary-blood-volume-derived-from-contrast-echocardiography-a-proof-of-concept-study
#4
Ken Monahan, Daniel Lenihan, Evan L Brittain, Linda Saliba, Robert N Piana, Leslie L Robison, Melissa M Hudson, Gregory T Armstrong
BACKGROUND: Pulmonary transit time (PTT) obtained from contrast echocardiography is a marker of global cardiopulmonary function. Pulmonary blood volume (PBV), derived from PTT, may be a noninvasive surrogate for left-sided filling pressures, such as pulmonary artery wedge pressure (PAWP). We sought to assess the relationship between PBV obtained from contrast echocardiography and PAWP. METHODS: Participants were adult survivors of childhood cancer that had contrast echocardiography performed nearly simultaneously with right-heart catheterization...
May 14, 2018: Echocardiography
https://www.readbyqxmd.com/read/29749645/right-ventricular-dyssynchrony-and-its-improvements-after-pulmonary-rehabilitation-in-patients-with-chronic-obstructive-pulmonary-disease
#5
Batur Kanar, Beste Ozben, Elif Yıldırım, İpek Ozmen, Rüya Aydin
PURPOSE: Whether pathologic alterations of right ventricle (RV) in chronic obstructive pulmonary disease (COPD) affect intra- and interventricular dyssynchrony due to changes in mechanical activation of the septum and RV is unclear. The aim of this study was to determine mechanical activation and its changes after pulmonary rehabilitation program (PRP) with speckle tracking echocardiography (STE) in COPD patients. METHODS: After the exclusion of 15 patients due to poor echogenicity and 5 patients not tolerating PRP out of 69 consecutive COPD patients undergoing PRP, the remaining 49 patients and 41 healthy subjects were enrolled...
May 11, 2018: Echocardiography
https://www.readbyqxmd.com/read/29748699/longitudinal-deformation-of-the-right-ventricle-in-hypoplastic-left-heart-syndrome-a-comparative-study-of-2d-feature-tracking-magnetic-resonance-imaging-and-2d-speckle-tracking-echocardiography
#6
Mona Salehi Ravesh, Carsten Rickers, Finn Jonathan Bannert, David Hautemann, Abdullah Al Bulushi, Dominik Daniel Gabbert, Philip Wegner, Eva Kis, Jan Hinnerk Hansen, Michaeal Jerosch-Herold, H-H Kramer, Jana Logoteta
In hypoplastic left heart syndrome (HLHS), long-term outcome is closely related to right ventricular function. Echocardiography and magnetic resonance imaging (MRI) are routinely used for functional assessment. MRI 2D-tissue feature tracking (2D-FT) allows quantification of myocardial deformation but has not yet been applied to HLHS patients. We sought to investigate the feasibility of this technique and to compare the results to 2D-speckle tracking echocardiography (2D-STE). In routine MRI 2D anatomical four chamber view, cine images were recorded in 55 HLHS patients (median age 4...
May 10, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29747850/imaging-right-left-ventricular-interactions
#7
REVIEW
Mark K Friedberg
The impact of one ventricle on the adjacent ventricle plays a key role in cardiac function. Ventricular-ventricular interactions are based on the arrangement in-series of the circulation and common pericardium, interventricular septum, and myocardial tracts. Imaging, in particular echocardiography, plays a central role in characterizing these interactions through geometric indices, septal configuration and motion, Doppler flow, timing of events in the ventricles and alterations in strain, remodeling, and diastolic filling with altered loading of the contralateral ventricle...
May 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29740837/increased-fetal-epicardial-fat-thickness-a-novel-ultrasound-marker-for-altered-fetal-metabolism-in-diabetic-pregnancies
#8
Mehmet O Akkurt, Ozhan M Turan, Sarah Crimmins, Christopher R Harman, Sifa Turan
OBJECTIVE: To evaluate whether fetal epicardial fat thickness (EFT) differs in diabetic and nondiabetic pregnant women. METHODS: Retrospective case-control study of pregnancies between 24 and 36 weeks complicated by preexisting (PDM) or gestational (GDM) diabetes mellitus, matched one to one with controls for body mass index and gestational age (GA). Epicardial fat was identified as the hypoechogenic area between myocardium and visceral pericardium over the right ventricle and its thickness was measured by a single observer blinded to clinical condition and outcomes...
May 8, 2018: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29730148/mri-derived-regional-biventricular-function-in-patients-with-chronic-thromboembolic-pulmonary-hypertension-before-and-after-pulmonary-endarterectomy
#9
Sabine K Maschke, Christian O Schoenfeld, Till F Kaireit, Serghei Cebotari, Karen Olsson, Marius Hoeper, Frank Wacker, Jens Vogel-Claussen
RATIONALE AND OBJECTIVES: The aim of this study was to assess regional myocardial function in patients with chronic thromboembolic hypertension (CTEPH) before and after successful pulmonary endarterectomy (PEA) using magnetic resonance imaging. METHODS: Twenty-two patients with CTEPH underwent cardiac magnetic resonance imaging before and 12 (11, 17) days after PEA. Mean pulmonary artery pressure was evaluated preoperatively by right heart catheterization and during post-PEA intensive care unit-stay using a Swan-Ganz catheter...
May 2, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29700862/the-quantitative-assessment-of-epicardial-fat-distribution-on-human-hearts-implications-for-epicardial-electrophysiology
#10
Alexander R Mattson, Mario J Soto, Paul A Iaizzo
INTRODUCTION: Epicardial electrophysiological procedures rely on dependable interfacing with the myocardial tissue. For example, epicardial pacing systems must generate sustainable chronic pacing capture, while epicardial ablations must effectively deliver energy to the target hyper-excitable myocytes. The human heart has a significant adipose layer which may impede epicardial procedures. The objective of this study was to quantitatively assess the relative location of epicardial adipose on the human heart, in order to define locations where epicardial therapies might be performed successfully...
April 26, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29700783/modeling-right-ventricle-failure-after-continuous-flow-left-ventricular-assist-device-a-biventricular-finite-element-and-lumped-parameter-analysis
#11
Francesco Scardulla, Valentina Agnese, Giuseppe Romano, Gabriele Di Gesaro, Sergio Sciacca, Diego Bellavia, Francesco Clemenza, Michele Pilato, Salvatore Pasta
The risk of right ventricle (RV) failure remains a major contraindication for continuous-flow left ventricular assist device (CF-LVAD) implantation in patients with heart failure. It is therefore critical to identify the patients who will benefit from early intervention to avoid adverse outcomes. We sought to advance the computational modeling description of the mechanisms underlying RV failure in LVAD-supported patients. RV failure was studied by computational modeling of hemodynamic and cardiac mechanics using lumped-parameter and biventricular finite element (FE) analysis...
April 26, 2018: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/29677212/pulsatile-operation-of-a-continuous-flow-right-ventricular-assist-device-rvad-to-improve-vascular-pulsatility
#12
Boon C Ng, Matthias Kleinheyer, Peter A Smith, Daniel Timms, William E Cohn, Einly Lim
Despite the widespread acceptance of rotary blood pump (RBP) in clinical use over the past decades, the diminished flow pulsatility generated by a fixed speed RBP has been regarded as a potential factor that may lead to adverse events such as vasculature stiffening and hemorrhagic strokes. In this study, we investigate the feasibility of generating physiological pulse pressure in the pulmonary circulation by modulating the speed of a right ventricular assist device (RVAD) in a mock circulation loop. A rectangular pulse profile with predetermined pulse width has been implemented as the pump speed pattern with two different phase shifts (0% and 50%) with respect to the ventricular contraction...
2018: PloS One
https://www.readbyqxmd.com/read/29673853/biventricular-dyssynchrony-on-cardiac-magnetic-resonance-imaging-and-its-correlation-with-myocardial-deformation-ventricular-function-and-objective-exercise-capacity-in-patients-with-repaired-tetralogy-of-fallot
#13
Pantelis Kalaitzidis, Stefan Orwat, Aleksander Kempny, Radke Robert, Brigitte Peters, Samir Sarikouch, Philipp Beerbaum, Helmut Baumgartner, Gerhard-Paul Diller
BACKGROUND: Electrical dyssynchrony and prolonged QRS duration are common in patients with repaired tetralogy of Fallot (ToF). It has been linked to increased risk of sudden cardiac death and right ventricular (RV) dysfunction. We investigated myocardial dyssynchrony using cardiac magnetic resonance imaging (CMR) and feature tracking analysis (FT) in this setting and compared it to myocardial deformation, conventional parameters of ventricular dysfunction and clinical parameters. METHODS AND RESULTS: Patients underwent standardized CMR investigations as part of a nationwide study...
April 12, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29673050/postnatal-persistence-of-fetal-cardiovascular-remodeling-associated-with-assisted-reproductive-technologies-a-cohort-study
#14
Brenda Valenzuela-Alcaraz, Audrey Serafini, Alvaro Sepulveda-Martínez, Gemma Casals, Merida Rodríguez-López, Laura Garcia-Otero, Monica Cruz-Lemini, Bart Bijnens, Marta Sitges, Juan Balasch, Eduard Gratacos, Fatima Crispi
OBJECTIVE: to assess the postnatal persistence of fetal cardiovascular remodeling associated to assisted reproductive technologies (ART), in children at 3 years of age. DESIGN: A cohort study of children conceived by ART. SETTING: Maternal-Fetal Medicine Unit, Hospital Clinic Barcelona, Spain. POPULATION SAMPLE: 80 singleton pregnancies conceived by ART and 80 spontaneously conceived (controls) followed from fetal life up to childhood...
April 19, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29670871/echocardiographic-evaluation-of-ventricular-function-for-the-neonatologist-and-pediatric-intensivist
#15
REVIEW
Cécile Tissot, Yogen Singh, Nicole Sekarski
In the neonatal and pediatric intensive care setting, bedside cardiac ultrasound is often used to assess ventricular dimensions and function. Depending upon the underlying disease process, it is necessary to be able to evaluate the systolic and diastolic function of left and or right ventricles. The systolic function of left ventricle is mostly assessed qualitatively on visual inspection "eye-balling" and quantitatively by measuring circumferential fraction shortening or calculating the ejection fraction by Simpson's planimetry...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29669970/prognostic-relevance-of-liver-stiffness-assessed-by-transient-elastography-in-patients-with-acute-decompensated-heart-failure
#16
Yuki Saito, Mahoto Kato, Koichi Nagashima, Koyuru Monno, Yoshihiro Aizawa, Yasuo Okumura, Naoki Matsumoto, Mitsuhiko Moriyama, Atsushi Hirayama
BACKGROUND: Acute decompensated heart failure (ADHF) is often accompanied by liver congestion through increased right atrial pressure (RAP). Liver stiffness (LS) assessed non-invasively using transient elastography is related to increased RAP and liver congestion in patients with general HF. We investigated the relationship of LS with clinical and echocardiographic variables and outcomes in patients with ADHF.Methods and Results:The subjects were 105 patients with ADHF admitted to hospital between October 2016 and June 2017...
April 17, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29667250/a-new-2d-echocardiographic-approach-to-evaluate-the-membrane-and-valve-movement-of-the-berlin-heart-excor-vad-chamber-in-pediatric-vad-patients
#17
Arianna Di Molfetta, Roberta Iacobelli, Gianfranco Ferrari, Sergio Filippelli, Gianluigi Perri, Alessandra Toscano, Rachele Adorisio, Paolo Guccione, Antonio Amodeo
The use of Berlin Heart EXCOR VAD (BH) is a validated therapy to bridge pediatric patients to heart transplant. Serial echocardiographic (ECHO) assessment of VAD patients is necessary to support patients' management. This work aims at developing an innovative strategy to evaluate the BH device functioning by ECHO and its interaction with the native heart in a pediatric population. ECHO evaluation of BH membrane movement, and inflow and outflow valves was performed in 2D, 2D-color Doppler, M-mode, and M-mode color Doppler to assess the functioning of the device by direct positioning of the ECHO probe on the BH cannulas and membranes...
April 2018: Artificial Organs
https://www.readbyqxmd.com/read/29665366/3-7-bis-2-hydroxyethyl-icaritin-a-potent-inhibitor-of-phosphodiesterase-5-prevents-monocrotaline-induced-pulmonary-arterial-hypertension-via-no-cgmp-activation-in-rats
#18
Tao-Hua Lan, Xiao-Ling Chen, Yun-Shan Wu, Hui-Liang Qiu, Jun-Zhe Li, Xin-Min Ruan, Dan-Ping Xu, Dong-Qun Lin
Pulmonary arterial hypertension (PAH) is a chronic progressive disease which leads to elevated pulmonary arterial pressure and right heart failure. 3,7-Bis(2-hydroxyethyl)icaritin (ICT), an icariin derivatives, was reported to have potent inhibitory activity on phosphodiesterase type 5 (PDE5) which plays a crucial role in the pathogenesis of PAH. The present study was designed to investigate the effects of ICT on monocrotaline (MCT)-induced PAH rat model and reveal the underlying mechanism. MCT-induced PAH rat models were established with intragastric administration of ICT (10, 20, 40mg/kg/d), Icariin (ICA) (40mg/kg/d) and Sildenafil (25mg/kg/d)...
April 14, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29623530/novel-insights-and-treatment-strategies-for-right-heart-failure
#19
REVIEW
Weiqin Lin, Ai-Ling Poh, W H Wilson Tang
PURPOSE OF REVIEW: The function of the right ventricle (RV) is intimately linked to its preload (systemic volume status) and afterload (pulmonary vasculature). In this review, we explore current knowledge in RV physiology, RV function assessment, causes of right heart failure (RHF), and specific treatment strategies for RHF. RECENT FINDINGS: We examine the evidence behind new pharmacological therapies available, such as macitentan and riociguat in the treatment of specific etiologies of RHF...
April 6, 2018: Current Heart Failure Reports
https://www.readbyqxmd.com/read/29619581/approach-to-undifferentiated-dyspnea-in-emergency-department-aids-in-rapid-clinical-decision-making
#20
Siva Nageswara Rao Guttikonda, Kiran Vadapalli
BACKGROUND: Diagnosis and management of patients presenting with acute dyspnea is one of the major challenges for physicians in emergency department (ED). A correct diagnosis is frequently delayed and difficult to ascertain, and clinical uncertainty is common, explaining the need for rapid diagnosis and a management plan. The primary aim of our study is to assess a diagnostic strategy using multiorgan point of care ultrasonography (USG) to differentiate patients presenting with acute dyspnea to ED into different diagnostic categories for timely management in a resource-limited setting...
April 4, 2018: International Journal of Emergency Medicine
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