Kheyfets, Vitaly O., Rios, Lourdes, Smith, Triston, Schroeder, Theodore, Mueller, Jeffrey, Murali, Srinivas, Lasorda, David, Zikos, Anthony, Spotti, Jennifer, Reilly, John J., and Finol, Ender A. The Influence of Pulmonary Hemodynamics on Right Ventricular Function in Pulmonary Hypertension. Proceedings of the ASME 2013 Summer Bioengineering Conference. Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments. Sunriver, Oregon, USA. June 26-29, 2013. V01AT19A006. ASME. https://doi.org/10.1115/SBC2013-14440. Download citation file:. ...
TY - JOUR. T1 - Imaging techniques for assessing pulmonary artery hypertension and right ventricular performance with special reference to COPD. AU - Matthay, Richard A.. AU - Shub, Clarence. PY - 1990/7. Y1 - 1990/7. N2 - Several imaging techniques, both noninvasive and minimally invasive, have now been applied widely for determining cardiovascular performance in patients with chronic respiratory disease, particularly COPD. Moreover, some of these techniques are useful for evaluating response to therapeutic intervention in these patients. The plain chest radiograph is useful primarily for detecting the presence of pulmonary artery hypertension in patients with COPD. Radionuclide angiocardiography, using either first-pass techniques or the gated equilibrium technique, is particularly useful for determining right and left ventricular ejection fraction. Echocardiography has evolved as a technique for assessing right ventricular size and function and, in some cases, the degree of pulmonary artery ...
Instantaneous measurement of left and right ventricular stroke volume and pressure-volume relationships with an impedance catheter. Circulation. 1984 Apr; 69(4):703-10 ...
TY - JOUR. T1 - Assessment of Right Ventricular Function in the Research Setting. T2 - Knowledge Gaps and Pathways Forward. An Official American Thoracic Society Research Statement. AU - Lahm, Tim. AU - Douglas, Ivor S. AU - Archer, Stephen L. AU - Bogaard, Harm J. AU - Chesler, Naomi C. AU - Haddad, Francois. AU - Hemnes, Anna R. AU - Kawut, Steven M. AU - Kline, Jeffrey A. AU - Kolb, Todd M. AU - Mathai, Stephen C. AU - Mercier, Olaf. AU - Michelakis, Evangelos D. AU - Naeije, Robert. AU - Tuder, Rubin M. AU - Ventetuolo, Corey E. AU - Vieillard-Baron, Antoine. AU - Voelkel, Norbert F. AU - Vonk-Noordegraaf, Anton. AU - Hassoun, Paul M. AU - American Thoracic Society Assembly on Pulmonary Circulation. PY - 2018/8/15. Y1 - 2018/8/15. N2 - BACKGROUND: Right ventricular (RV) adaptation to acute and chronic pulmonary hypertensive syndromes is a significant determinant of short- and long-term outcomes. Although remarkable progress has been made in the understanding of RV function and failure since ...
Background and Objectives : Initial experience with transcatheter closure of patent ductus arteriosus (PDA) using detachable coils and Amplatzer duct occluder devices is reported. We evaluated the outcome, complications, and influence of the learning curve, and also assessed the need of surgical backup for such interventional procedures. Methods: From January 2000 to December 2004, 121 patients underwent transcatheter closure of PDA. Aortic angiogram was performed to evaluate the size, position, and shape of the duct for appropriately choosing the occluder device type and size. A second aortic angiogram was performed 10 minutes after device deployment. Echocardiography was repeated at intervals of 24 hours, then at 1, 3, and 6 months after the procedure to assess complications. Stepwise multiple regression analysis was used to assess the role of experience in improving the outcome of the procedure. Results: Of 121 cases, four patients had pulmonary artery embolization of the occluder device ...
Due to her dyspnea in the setting of MCTD, a transthoracic echocardiogram was obtained. It demonstrated severe pulmonary hypertension (PASP 85) with a dilated hypertrophied right ventricle and moderately reduced right ventricular systolic function. Her six-minute walk test (6MWT) demonstrated an ambulation of 1,570 feet on room air with a corresponding modified Borg dyspnea score of 5. A right heart catheterization was obtained and showed a right ventricle systolic pressure of 74 mmHg, a right ventricle diastolic pressure of 10, a pulmonary capillary wedge pressure of 10 and a pulmonary artery mean pressure of 51. A pulmonary angiography was negative for chronic or acute thrombopulmonary embolus. She was classified with PAH class IIIA and eventually started on ambrisentan.. A repeat transthoracic echocardiogram one year later demonstrated an estimated pulmonary arterial systolic pressure of 72 mmHg and moderate to severe reduction in right ventricular systolic function. Her 6MWT and Borg dyspnea ...
Semantic Scholar extracted view of Pulmonary hypertension and right ventricular function: interdependence in pathophysiology and management. by Sherif Afifi et al.
Multiple noninvasive imaging modalities are available to measure biventricular function, although limited studies have assessed agreement between modalities in assessing left and right ventricular ejection fraction (LVEF & RVEF) in the same cohort of patients. In this study we prospectively compared the agreement of 2-dimensional echocardiography (2DE), contrast enhanced 2DE, 3-dimensional echocardiography (3DE), and gated heart pool scan (GHPS) measures of LVEF and RVEF in patients with acute ST-elevation myocardial infarction. We recruited 95 consecutive ST-elevation myocardial infarction patients (mean age 61.4 ± 12.0, male: 79.5%) admitted to a major tertiary hospital between July 2016 and May 2018. Despite minimal inter- and intra-observer variability (coefficient of variance , 5% in both categories), substantial discrepancies exist between modalities with Pearsons correlation coefficients ranging from 0.64 to 0.91 for LVEF measurements, and 0.27 to 0.86 for RVEF measurements. ...
Mechanical ventilation induces cyclic changes in vena cava blood flow, pulmonary artery blood flow and aortic blood flow. At the bedside, changes in the aortic blood flow are reflected by swings in the blood pressure curve (and thus variations in stroke volume and blood pressure). The magnitude of these variations is highly dependent on the volume responsiveness of the patient.. With controlled ventilation, the rise in intrathoracic pressure during early inspiration leads to a squeezing of the pulmonary blood into the left ventricle. This process in turn increases the left ventricular preload. With a volume responsive patient, this results in an increased stroke volume or pulse pressure.. An increase in intrathoracic pressure also results in reduced right ventricular filling. With a volume responsive right heart, this will reduce the volume being ejected. Thus, during late inspiration a couple of heartbeats later, the left ventricular preload will decrease as will the stroke volume or pulse ...
Results Subjects with RV dysfunction (51%) had lower body mass index, lower fat mass index, and were more likely to display cachexia (19%). The extent of RV dysfunction correlated with greater antecedent weight loss and a lower fat/lean body mass ratio. Over a median follow-up of 541 days, there were 150 events (37%). Risk of event was greater in subjects with RV dysfunction (hazard ratio: 3.09 [95% confidence interval (CI): 2.18 to 4.45]) and cachexia (hazard ratio: 2.90 [95% CI: 2.00 to 4.12]) in univariate and multivariate analyses. Increased body mass index was associated with a lower event rate (HR per kg/m2: 0.92 [95% CI: 0.88 to 0.96]), and this protection was mediated by a higher fat mass (0.91 [95% CI: 0.87 to 0.96]) but not a fat-free mass index (0.97 [95% CI: 0.92 to 1.03]). ...
Right ventricular ejection fraction (RV-EF) has traditionally been used to measure and compare RV function serially over time, but may be a relatively insensitive marker of change in RV myocardial contractile function. We developed a cardiovascular m
This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience ...
2008 (English)In: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 9, no 2, 225-234 p.Article in journal (Refereed) Published ...
The right ventricle (RV) has an important contribution to the overall cardiac function; however, data regarding RV function in DM are still rather incomplete. Diabetes mellitus, particularly type 2 DM, affects RV diastolic function in the presence of normal RV systolic function. Myocardial dysfunction in DM is not confined to the LV, but also involves the RV. The impairment of RV function encompasses both systolic and diastolic abnormalities as well [10]. Tissue Doppler imaging is a useful tool to detect early abnormalities of RV diastolic and systolic dysfunction in patients with DM [10-12]. The alterations in myocardial function may be attributed to ventricular interdependence as well as to the uniform effect of diabetes on the cardiac function [10]. Impairment in RV myocardial function is evident mainly by the application of TDI-derived indices, which tend to correlate significantly with the severity and complications of DM. Type 2 DM has been reported to influence the RV function in the ...
This article requires a subscription or purchase to view the full text. If you are a subscriber or member, click the login link or the subscribe link in the top menu above to access this article.. ...
An electrocardiogram (ECG) revealed atrial fibrillation with intrinsic atrioventricular conduction and intermittent ventricular paced complexes.
X T Wang, D W Liu, H M Zhang, Y Long, X D Guan, H B Qiu, K J Yu, J Yan, H Zhao, Y Q Tang, X Ding, X C Ma, W Du, Y Kang, B Tang, Y H Ai, H W He, D C Chen, H Chen, W Z Chai, X Zhou, N Cui, H Wang, X Rui, Z J Hu, J G Li, Y Xu, Y Yang, B Ouyan, H Y Lin, Y M Li, X Y Wan, R L Yang, Y Z Qin, Y G Chao, Z Y Xie, R H Sun, Z Y He, D F Wang, Q Q Huang, D P Jiang, X Y Cao, R G Yu, X Wang, X K Chen, J F Wu, L N Zhang, M G Yin, L X Liu, S W Li, Z J Chen, Z ...
PubMed comprises more than 30 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.
My Mum had radiation to the frontal lobe of her brain, about 5 years ago for a 8.5 cm butterfly shaped non Hodgkins lymphoma. It hasnt come back,
RESULTS: Linear dimensions and tissue Doppler velocities were highly reproducible, while time intervals and FAC measurements were more variable. Three-chamber FAC was higher than four-chamber FAC (36 ± 5% vs. 24 ± 7%, P , .001). Lateral wall peak longitudinal strain was similar to the value for the inferior wall (22 ± 4% vs 18 ± 5%, P , .05). A small increase in RV dimensions was noted on day 2 of life (midcavity diameter, 1.71 ± 0.19 vs 1.55 ± 0.19 cm, P , .01; RV anteroinferior basal diameter, 2.24 ± 0.29 vs 2.06 ± 0.24 cm, P , .01; end-diastolic-area in the apical four-chamber view, 4.32 ± 0.64 vs 4.10 ± 0.69 cm(2), P = .04), while no changes occurred in functional indices. RV dimensions and FAC showed moderate linear correlations with birth weight. Z scores could be computed for the majority of measured indices ...
Semantic Scholar extracted view of Abstract 260: Quantitative Evaluation of Right Ventricular Volume and Its Ejection Fraction by 320 Slice Computed Tomography Compared With Three Dimensional Echocardiogram by Maiko Takahashi et al.
This case emphasises the importance of a full diagnostic work-up for patients with PH. Classification and diagnosis of the underlying cause of PH [5] is important, in order to ensure optimal management, but may be complicated by overlapping signs and symptoms. While dyspnoea is a common clinical finding in PH, it is nonspecific; therefore, a correct diagnosis of patients presenting with breathlessness relies on a full diagnostic work-up. Echocardiography is a useful noninvasive technique in this respect, allowing estimation of baseline and follow-up Ppa, tricuspid regurgitation, and atrial and ventricular size and function. However, the correlation between calculated Ppa by echocardiography and that measured by right heart catheterisation is reported to be poor [6, 7]. TAPSE and Tei index are useful parameters of right ventricular function in pulmonary arterial hypertension (PAH) and assessment of these may be more accurate than echocardiography-calculated Ppa alone [8]. In addition, TAPSE and ...
Read about the experiences consumers and owners have had with Class A - Diesel RVs and view their reviews and ratings on various aspects of them.
right quadrant - MedHelps right quadrant Center for Information, Symptoms, Resources, Treatments and Tools for right quadrant. Find right quadrant information, treatments for right quadrant and right quadrant symptoms.
Does anyone know what CM is supposed to look like right before you are due to start your period? - what does it look like right before your period starts ...
Not all outerwear fits and sizes are created equal. Find the proper mens and womens outerwear fit that matches your style, and get the right size to match.
I am very mentally fragile right now and in a fibro flare and my backs been bad. Its taking everything in me to get out of bed each day. I am sticking with the...
Is Rascal Does Not Dream Of Bunny Girl Senpai the most popular anime right now? If you want to know what the hottest current anime is, youve come to the ...
το κείμενο με τίτλο Guided in the right direction σχετίζετε με Τεχνίτη Νοημοσύνη και Ρομποτική
Just read this on another forum (originally posted by Toyguru): So apparently Universal now owns MOTU. :hmconf: Thoughts?
Real-time three-dimensional echocardiography for determining right ventricular stroke volume in an animal model of chronic right ventricular volume overload.
Introduction: Right ventricular hypertrophy (RVH) and right ventricular failure are major determinants of prognosis and functional state of patients with congenital heart disease or pulmonary artery hypertension (PAH). We previously reported that a metabolic shift to glycolysis occurs in RVH associated with experimental PAH. Moreover, dichloroacetate, an inhibitor of mitochondrial pyruvate dehydrogenase kinase enhances glucose oxidation and improves RV function in experimental PAH. We hypothesize that another metabolic modulator, trimetazidine, a blocker of fatty acid oxidation, will also restore RV function by blocking fatty acid oxidation and improving glucose oxidation in RVH caused by pulmonary artery banding (PAB).. Methods and Results: RVH was induced in Sprague-Dawley rats by PAB (using a 1.3 mm constrictor placed by partial median sternotomy). Trimetazidine (0.7g/L) was added to drinking water after the surgery. 8 weeks later, the RV/LV+Septum weight ratio was increased from 0.25±0.01 ...
Advanced chronic kidney disease often results in adverse cardiovascular outcomes and is the leading cause of mortality in patients with end stage renal diseases (ESRD). There is much information about the effect of chronic kidney diseases (CKD) on the left ventricle (LV) chamber, but the right ventricle (RV) as a neglected chamber had not been evaluated precisely, in spite of its importance. The aim of this study was to evaluate the impact of successful kidney transplants on the RV systolic and diastolic function using the advanced method of 2D speckle tracking echocardiography and comparison with the conventional methods. The study included 48 patients with CKD who were eligible for kidney transplantation and underwent successful kidney transplantations. Right ventricular indices were evaluated, while RV function was focused by conventional methods and 2D speckle tracking echocardiography before the successful kidney transplant and 1 week, 1 month, and 3 months after the successful kidney transplant.
Background Right ventricular ejection fraction (RVEF) is an emerging prognostic predictor of patients with pulmonary hypertension (PH).. Aim We sought to evaluate the accuracy and suitability of two echocardiographic parameters of right ventricular systolic function: tricuspid annular plane systolic excursion (TAPSE) and systolic lateral tricuspid annular motion velocity (TVlat) in the monitoring of RVEF of PH patients.. Methods Consecutive 37 patients with PH (median pulmonary arterial pressure 36 (28 -43) mmHg) were studied. We measured TAPSE and TVlat as echocardiographic indices of RVEF. TAPSE and TVlat measured at baseline and at follow-up, and the changes during follow-up were compared with those of magnetic resonance imaging (MRI)-derived RVEF. Receiver operating characteristic (ROC) analysis was conducted to calculate the cut-off levels of TAPSE and TVlat for the identification of patients with improved RVEF.. Results TAPSE and TVlat were significantly correlated with MRI-derived RVEF at ...
Several studies have reported the association between sleep disorders to an increased risk to the development of cardiac disease. However, there is no substantial that about the influence of Obstructive Sleep Apnea on the right ventricular function. Objective: to analyse the right ventricular function in patients with Obstructive Sleep Apnea by means of Real-Time Three dimensional Echocardiography ...
RV function may be impaired in a variety of cardiovascular and pulmonary disease states with chronic left‐sided heart failure being the most common.50, 51 Both pathophysiological and prognostic significance of the right heart and pulmonary circulation have been underestimated in the past but more recently have been recognized to be of crucial prognostic significance.52 The same is true in postcardiotomy ECMO support: although preoperative LV function has been studied extensively, the role of RV function and pulmonary circulation remains unknown. The incidence of right heart failure following cardiotomy is relatively low, ranging from 0.04% to 1% depending on the study.29 However, with more heterogeneous cohorts, a relative increase can be observed. In particular, recipients of LV assist devices are susceptible to refractory right heart failure, which occurs in up to 30%.29 Similar hemodynamic concepts apply to patients receiving ECMO support after pericardiotomy: altered interventricular ...
3. Evaluation of right-sided chambers. Dilatation of the right ventricle with normal valve leaflets suggests functional TR; dilated right atrium may be an indicator of severity of TR or atrial septal defect. Right ventricular volume overload may be suggested by ventricular septal flattening in diastole or paradoxical septal motion. Global and regional right ventricular function assessment is also important - regional dysfunction may suggest previous right ventricular infarction; global dysfunction may indicate progression of a left-sided process to biventricular cardiomyopathy.. 4. Measurement of peak right ventricular systolic pressure. By measuring peak tricuspid regurgitant velocity, systolic pulmonary artery pressure can be estimated. An accurate estimation of right ventricular systolic pressure is important in distinguishing between secondary and primary causes. Systolic pulmonary artery pressures of ,55 mmHg are likely to cause TR with anatomically normal valves, whereas significant TR ...
The cardiorenal syndrome generally focuses on left ventricular function, and the importance of the right ventricle as a determinant of renal function is described less frequently. In a cohort of critically ill patients with echocardiographic measurements obtained within 24 hours of admission to the intensive care unit, we examined the association of right ventricular function with acute kidney injury (AKI) and AKI-associated mortality. We also examined whether clinical measurement of volume overload modified the association between ventricular function and AKI in a subpopulation with documented admission physical examinations. Among 1879 critically ill patients with echocardiographic ventricular measurements, 43% (n = 807) had ventricular dysfunction-21% (n = 388), 9% (n = 167), and 13% (n = 252) with isolated left ventricular dysfunction, isolated right ventricular dysfunction, and biventricular dysfunction, respectively. Overall, ventricular dysfunction was associated with a 43% higher ...
Read 3D echocardiographic evaluation of right ventricular function and strain: a prognostic study in paediatric pulmonary hypertension, European Heart Journal - Cardiovascular Imaging on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Background: Assessment of right ventricular (RV) mechanical function in patients with pulmonary arterial hypertension (PAH) is clinically important but challenging using current 2-dimensional (2D) methods.. Objective: Our aim was to use the novel approach of 3-dimensional (3D) speckle tracking strain echocardiography to assess RV mechanics in patients with chronic PAH.. Methods: We studied 40 subjects prospectively: 25 patients with chronic PAH (aged 60±15 years) and 15 normal controls. Routine echo RV parameters included tricuspid annular plane systolic excursion (TAPSE), RV area and RV fractional area change. 3D speckle tracking strain echocardiography was used to assess global area tracking strain, maximum time delay to peak strain, and standard deviation of the time to peak strain in RV wall.. Results: Compared to normal subjects, PAH patients had statistically different TAPSE (16±3 vs. 25±3 mm, p,0.0001), RV end-diastolic area (25±8 vs. 19±4 cm2, p,0.01), RV end-systolic areas (18±8 ...
Effects of renin-angiotensin system inhibition on right ventricular function in patients with mild essential hypertension, Pechlivanidis, Georgios, Mantziari Lilian, Giannakoulas Georgios, Dimitroula Hariklia, Styliadis Charalampos, Karvounis Haralambos, Styliadis Ioannis, and Parharidis Georgios , Journal of the Renin-Angiotensin-Aldosterone System, Jan-09-2011, Volume 12398265312971111130582063107826988902872401312292102268232870, Issue 3, p.358 - 364, (2011) ...
Effects of renin-angiotensin system inhibition on right ventricular function in patients with mild essential hypertension, Pechlivanidis, Georgios, Mantziari Lilian, Giannakoulas Georgios, Dimitroula Hariklia, Styliadis Charalampos, Karvounis Haralambos, Styliadis Ioannis, and Parharidis Georgios , Journal of the Renin-Angiotensin-Aldosterone System, Jan-09-2011, Volume 12398265312971111130582063107826988902872401312292102268232870, Issue 3, p.358 - 364, (2011) ...
Objective: The main purpose of present study was to investigate the impact of percutaneous closure of atrial septal defect (ASD) on right ventricular (RV) systolic function assessed by tricuspid annular isovolumic myocardial acceleration (IVA) that is independent of preload and afterload changes. Methods: A prospective cohort study was designed involving twenty five patients with secundum type ASD whom were successfully closed percutaneously between 2009 and 2011. Standard transthoracic echocardiography and tissue Doppler imaging were performed in all patients 12 to 24 hours before and one month after closure. Paired t test was performed to determine the statistical significance of variables before and after closure. Results: Significant decreases were observed in RV end-diastolic diameter, RV/left ventricular (LV) end-diastolic diameter ratio, right ventricular systolic myocardial velocity (Sm), right ventricular early myocardial velocity (Em) and right ventricular late myocardial velocity (Am) ...
In the present study, the right ventricles of 10 Beagle dogs were investigated by means of 3DE and CCT in comparison with the reference method CMRI. The major challenge for determining right ventricular volume is the right ventricle itself. The complex shape with its segmentation in body, inflow and outflow tract, the thin RV wall and the heavy trabeculation make the RV measurement in two-dimensional echocardiography difficult [6]. CMRI is the gold standard for RV volumetric quantification in human medicine [18] and overcomes the limitation of 2D echocardiography by using a three-dimensional volume set, as well as the 3D modalities 3DE and CCT. Although the assessment of left ventricular function using two- and three-dimensional volume estimation is part of various veterinary publications [27]-[30], there are to the best knowledge of the author no veterinary studies concerning the evaluation of right ventricular function either by means of two-dimensional volume calculation or even ...
Right ventricular (RV) function is known to predict survival in pulmonary hypertension (PH). Furthermore, increasing right ventricular volumes (RVEDVI, RV end diastolic volume and RVESVI, RV end systolic volume index) and falling ejection fraction (RVEF) whilst on treatment have been shown to determine poorer outcome.1 Measurement of RV function by cardiac MRI (CMR) is not widely available and often poorly tolerated in very breathless patients. Monitoring of PH patients traditionally focuses on serial 6 min walk testing (6MWD) and N terminal pro brain natriuretic peptide (NTproBNP), a biomarker that has been shown to reflect RV function and structure.2 We hypothesised that ∆NTproBNP is a superior non invasive marker of ∆RV function than ∆6MWD, and predicts survival.. ...
Pulmonary hypertension (PH) and right ventricular (RV) hypertrophy frequently develop in patients with hypoxic lung disease. Chronic alveolar hypoxia (CH) promotes sustained pulmonary vasoconstriction and pulmonary artery (PA) remodeling by acting on lung cells, resulting in the development of PH. RV hypertrophy develops in response to PH, but arterial hypoxemia in CH may influence that response by activating Hypoxia-Inducible Factor-1α (HIF-1α) and/or HIF-2α in cardiomyocytes. Indeed, other studies show that attenuation of PH in CH fails to prevent RV remodeling, suggesting that PH-independent factors regulate RV hypertrophy. Therefore, we examined the role of HIFs in RV remodeling in CH-induced PH. We deleted HIF-1α and/or HIF-2α in hearts of adult mice that were then housed under normoxia or CH (10% O2) for 4 weeks. RNA-seq analysis of the RV revealed that HIF-1α and HIF-2α regulate the transcription of largely distinct gene sets during CH. RV systolic pressure (RVSP) increased and RV ...
TY - JOUR. T1 - Right ventricular volume measurement by conductance catheter. AU - Danton, Mark H D. AU - Greil, Gerald F.. AU - Byrne, John G.. AU - Hsin, Michael. AU - Cohn, Lawrence. AU - Maier, Stephan E.. PY - 2003/10/1. Y1 - 2003/10/1. N2 - Continuous ventricular volume measurement by the conductance method assumes a homogeneous electrical field dispersed throughout and contained within the ventricle. Because of dense trabeculation and complex geometry, right ventricular (RV) volume description by this method may be seriously compromised. This study sought to determine the accuracy and limitations of RV volume measurement by conductance, with magnetic resonance (MR) imaging (MRI) used as a reference, in the porcine RV. Anesthetized pigs (n = 5, 45-55 kg) were placed in a 1.5-T magnet, and ECG-gated transverse MR images (5-mm slices) were acquired during the complete cardiac cycle. RV cavity volumes were subsequently determined by Simpsons technique. Animals were then instrumented with an ...
Introduction. In pulmonary arterial hypertension (PAH), increased load leads to right ventricular (RV) dysfunction. We showed that despite a modest reduction in pulmonary vascular resistance (PVR) after treatment, RV function can decrease resulting in poor prognosis1.. Aims. We hypothesize that RV function can be sustained when therapies reduce RV load to a larger extent. We will compare RV load in PAH patients with improved/stable RV function to patients with decreased RV function during follow-up.. Methods. 76 patients underwent right heart catheterization to measure mean pulmonary artery pressure (mPAP) and PVR and MRI to assess RV ejection fraction (RVEF) at baseline and after 1 year of therapy. During a subsequent follow-up of 47months, 17 patients died.. Results. After therapy, 61% of the patients showed an improved/stable RVEF and had a better prognosis than patients with decreased RVEF (p=0.01). Patients with improved/stable RVEF showed a larger reduction in load (ΔmPAP: -9±12mmHg; ...
Despite considerable advances in medical therapy for pulmonary arterial hypertension (PAH), long-term mortality remains high (2), largely as a result of right heart failure. It is well established that measures of right ventricular (RV) performance, rather than pulmonary artery pressure, are the key determinants of survival (3,4). Hence, a major focus of current research efforts is characterizing and understanding RV dysfunction. An important contribution is the paper in this issue of the Journal by van de Veerdonk et al. (4). This group of investigators, who have an established track record in cardiac magnetic resonance imaging (MRI) for assessing RV structure and function, compared the prognostic value of right ventricular ejection fraction (RVEF) measured by MRI, with pulmonary vascular resistance (PVR) by right heart catheterization, both at baseline and after 1 year of PAH-specific therapies. PVR is a long-accepted, albeit imperfect, measure of RV afterload (5) that has been predictive of ...
In the largest human study to date on the topic, researchers have uncovered evidence of the possible influence of human sex hormones on the structure and function of the right ventricle of the heart.
Aim of this study is to investigate whether and to what extent a cautious respiratory and exercise therapy can complement medical treatment and change the condition, oxygen uptake, quality of life, the pulmonary vascular pressures, the size of the right heart and the 6-minute walk distance in patients with pulmonary hypertension ...
You appear to have a browser that does not support javaScript or javaScript has been disabled. Dropdown menus will not work however the links contained in the dropdowns can be accessed in the Browse the Spiral communities and collections of the home page. ...
Most previous studies have used simple measures such as RV fractional area change or tricuspid annular plane excursion to demonstrate the prognostic importance of RV function in patients with heart failure or recent myocardial infarction. As an important advance, Park et al. (1) compare these established measures with newer 2D deformation measures and conclude that RV longitudinal strain provides better predictive accuracy. They used velocity vector imaging, a technique that tracks unique 2D ultrasound patterns within the RV endocardium and measures the distance and direction of their movement between image frames. This is similar, but not identical, to other 2D strain techniques, and the degree to which the results of this study can be generalized remains untested (13). Furthermore, deformation of the interventricular septum is predominantly affected by the LV, and there is contention over whether it should be incorporated in global measures of RV function. The data of Park et al. (1) suggest ...
PURPOSE: Pulmonary hypertension (PH) is associated with a poor outcome in chronic obstructive pulmonary disease (COPD) and is diagnosed invasively. We aimed to assess the diagnostic accuracy and prognostic value of non-invasive cardiovascular magnetic resonance (CMR) models. METHODS: Patients with COPD and suspected PH, who underwent CMR and right heart catheter (RHC) were identified. Three candidate models were assessed: 1, CMR-RV model, based on right ventricular (RV) mass and interventricular septal angle; 2, CMR PA/RV includes RV mass, septal angle and pulmonary artery (PA) measurements; 3, the Alpha index, based on RV ejection fraction and PA size ...
Of a total of 26 patients included in the study, 5 underwent pneumonectomy, while the rest underwent lobectomy. Left and right pneumonectomy was performed in 38 and 62% of the patients respectively. None of the patients had right ventricular (RV) dilation or dysfunction on preoperative echocardiograms. Postoperatively, mean LV ejection fraction (LVEF) was 52 (±7.5) %. Mean RV strain in immediate postoperative period (day 2) was -15.1% (reduction of more than 20%). None of the patients progressed to RV failure or had mortality. Estimated RV systolic pressure was 41 (±20) mm Hg. The differences in RV echocardiographic parameters were significantly different pre- and postsurgery. The RV function decreased significantly on POD 2, which improved slightly thereafter. Extent of resection and side of resection did not make a difference in the RV functions. ...
Left Ventricle vs Right Ventricle The heart has several parts in it. This would include the left and right atrium and the left and right ventricle. Both of the
Attributes { s { cruise_id { String bcodmo_name cruise_id; String description cruise identifier; String long_name Cruise Id; String units unitless; } cast { Byte _FillValue 127; Byte actual_range 4, 14; String bcodmo_name cast; String description cast number; String long_name Cast; String units unitless; } station { Byte _FillValue 127; Byte actual_range 4, 8; String bcodmo_name station; String description station number; String long_name Station; String units unitless; } depth_id { String bcodmo_name depth_comment; String description depth description: sequence of depths sampled with 1 is surface and higher numbers at greater depths; String long_name Depth; String standard_name depth; String units unitless; } depth { String _CoordinateAxisType Height; String _CoordinateZisPositive down; Float64 _FillValue NaN; Float64 actual_range 1.0, 4574.0; String axis Z; String bcodmo_name depth; Float64 colorBarMaximum 8000.0; Float64 colorBarMinimum -8000.0; ...
What is the difference between Left and Right Ventricle? Left ventricle is the left lower chamber of the heart while right ventricle is the right lower ..
Nagging pain on right side - I went for a short power walk today after work and toward I started getting a nagging side stitch that made me slow down. How do I avoid this? Exercise intolerance. In a young female who is otherwise healthy, discomfort in the lower chest and upper abdomen may be related to exercise intolerance. The person needs to gradually increase their tolerance and insurance, however, if the symptoms are persistent the person needs evaluation of the cardiorespiratory system. You may get alternative points of view from other healthtap physicians
Doctors give trusted, helpful answers on causes, diagnosis, symptoms, treatment, and more: Dr. Krauser on numbness and tingling on right side of body: Impossible to say without more information. However if it has persisted greater than 2 weeks, it should be evaluated. Could be anything from a temporary viral inflammation to ms, to a brain tumor.
Centre for Regulatory Studies, Governance and Public Policy, NUJS organizes Summer Course on Right to Information from 10-21 July, 2017 at The West Bengal National University of Juridical Sciences 12,...
Hi! I am suffering from dental ache from couple of Weeks which goes to my ear on right side. This is very disturbing. Kindly help me.-We need more investigat...
Whenever we are talking, expressing, sharing anything with other, we think ten time How to share? How to talk? How to to espress? what is the rigth way to express ourself. ?? is it right? is it right??? is it right??? is it right??? Which one is right foramt to express.? There is no rigth formate to express…
October 7th , 2020 Monthly publication of the number of shares comprising the share capital and the total number of voting rights(Articles L. 233-8 of the French Commercial Code and 223-16 of the AMF General Regulations) Stop date of information Total number of shares forming the share capital Total number of voting rightsSeptember 30, 20208.937.085 Gross total voting rights: 15.424.506Net* total voting rights: 15.366.007 * Net total = total number of voting rights attached to shares - shares deprived of voting rights Attachment UK_Publication mensuelle VPM 30092020
Every female has the right to conceive if she wants and keep the baby if she wants but if proves she is not fit to care for it the society has to step in. if you are a fit parent you have that right. Not if you are unfit since you have no right to hurt a child in any way.
Here we are, in the second thread for talking about what youre playing right now. Or, you know, as close to right now as you can, since youre obviously reading this right now, not playing a game. Hopefully. I dont know.
Your pregnancy has started -- even though you may not know it. Find out whats going on right now during your babys very first weeks of life in utero.