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Right ventricular dysfunction

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https://www.readbyqxmd.com/read/28431873/a-novel-clinical-index-for-the-assessment-of-rvd-in-acute-pulmonary-embolism-blood-pressure-index
#1
Hale Ates, Ihsan Ates, Harun Kundi, Mehmet Fettah Arikan, Fatma Meric Yilmaz
BACKGROUND: This study aims to investigate the role of the blood pressure index (BPI), which is a new index that we developed, in detection of right ventricular dysfunction (RVD) in acute pulmonary embolism (APE). METHODS: A total of 539 patients, (253 males and 286 females), diagnosed with APE using computer tomography pulmonary angiography were included in the study. The BPI was obtained by dividing systolic blood pressure (SBP) by diastolic blood pressure (DBP)...
April 12, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28431860/predictive-value-of-perfusion-defects-on-dual-energy-cta-in-the-absence-of-thromboembolic-clots
#2
Richard A P Takx, Thomas Henzler, U Joseph Schoepf, Thomas Germann, Stefan O Schoenberg, Aysel Shirinova, Ralf W Bauer, Claudia Frellesen, Long Jiang Zhang, John W Nance, Christian Fink, Paul Apfaltrer
BACKGROUND: To determine the predictive value of volumetrically measured lung perfusion defects (PDvol) and right ventricular dysfunction on dual-energy computed tomography angiography (DE-CTA) for predicting all cause mortality in patients suspected of pulmonary embolism (PE) but without evident thromboembolic clot on CTA. METHODS: 448 patients underwent DE-CTA on a 64-channel DSCT system between January 2007 and December 2012 for suspected PE, of which 115 were without detectable thromboembolic clot on CTA...
April 18, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28416983/local-conduction-during-acute-myocardial-infarction-in-rats-interplay-between-central-sympathetic-activation-and-endothelin
#3
Theofilos M Kolettis, Marianthi Kontonika, Vassilios La Rocca, Antonios P Vlahos, Giannis G Baltogiannis, Zenon S Kyriakides
We investigated the effects of autonomic dysfunction and endothelin on local conduction and arrhythmogenesis during myocardial infarction. We recorded ventricular tachyarrhythmias, monophasic action potentials, and activation sequences in wild-type and ETB-deficient rats displaying high endothelin levels. Central sympathetic inputs were examined after clonidine administration. Clonidine mitigated early and delayed arrhythmogenesis in ETB-deficient and wild-type rats, respectively. The right ventricular activation delay increased in clonidine-treated ETB-deficient rats and slightly decreased in wild-type rats...
April 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28416981/relationship-between-right-and-left-ventricular-function-in-candidates-for-implantable-cardioverter-defibrillator-with-low-left-ventricular-ejection-fraction
#4
Laura Jimenez-Juan, Gauri R Karur, Kim A Connelly, Djeven Deva, Raymond T Yan, Rachel M Wald, Sheldon Singh, General Leung, Anastasia Oikonomou, Paul Dorian, Paul Angaran, Andrew T Yan
BACKGROUND: Indications for the primary prevention of sudden death using an implantable cardioverter defibrillator (ICD) are based predominantly on left ventricular ejection fraction (LVEF). However, right ventricular ejection fraction (RVEF) is also a known prognostic factor in a variety of structural heart diseases that predispose to sudden cardiac death. We sought to investigate the relationship between right and left ventricular parameters (function and volume) measured by cardiovascular magnetic resonance (CMR) among a broad spectrum of patients considered for an ICD...
April 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28416392/right-ventricular-function-after-cardiac-surgery-is-a-strong-independent-predictor-for-long-term-mortality
#5
Inge T Bootsma, Fellery de Lange, Matty Koopmans, Johannes Haenen, Piet W Boonstra, Tomas Symersky, E Christiaan Boerma
OBJECTIVE: To establish the all-cause mortality of right ventricular dysfunction after cardiac surgery in a heterogeneous group of cardiac surgery patients. DESIGN: Retrospective analysis of a heterogeneous group of 1,109 cardiac surgery patients in a 4-year period. SETTING: Single-center study in a tertiary teaching hospital. PARTICIPANTS: One thousand one hundred nine cardiac surgery patients. By protocol, patients were monitored with a pulmonary artery catheter, enabling continuous right ventricular ejection fraction (RVEF) measurements...
February 5, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28412423/rv-contractile-function-and-its-coupling-to-pulmonary-circulation-in-heart-failure-with-preserved%C3%A2-ejection%C3%A2-fraction-stratification-of-clinical-phenotypes-and-outcomes
#6
Marco Guazzi, Debra Dixon, Valentina Labate, Lauren Beussink-Nelson, Francesco Bandera, Michael J Cuttica, Sanijv J Shah
OBJECTIVES: This study sought to investigate how right ventricular (RV) contractile function and its coupling with pulmonary circulation (PC) stratify clinical phenotypes and outcome in heart failure preserved ejection fraction (HFpEF) patients. BACKGROUND: Pulmonary hypertension and RV dysfunction are key hemodynamic abnormalities in HFpEF. METHODS: Three hundred eighty seven HFpEF patients (mean age 64 ± 12 years, 59% females, left ventricular ejection fraction 59 ± 7%) underwent RV and pulmonary hemodynamic evaluation by echocardiography (entire population) and right heart catheterization (219 patients)...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28410946/right-atrial-dysfunction-in-the-fetus-with-severely-regurgitant-tricuspid-valve-disease-a-potential-source-of-cardiovascular-compromise
#7
Lisa W Howley, Nee Scze Khoo, Anita J Moon-Grady, Sonali S Patel, Fayeza Alrais, Wayne Tworetzky, Timothy Colen, Paul Brooks, Jean Trines, Tiina Ojala, Lisa K Hornberger
BACKGROUND: In severe right heart obstruction (RHO), redistribution of cardiac output to the left ventricle (LV) is well tolerated by the fetal circulation. Although the same should be true of severely regurgitant tricuspid valve disease (rTVD) with reduced or no output from the right ventricle, affected fetuses more frequently develop hydrops or suffer intrauterine demise. We hypothesized that right atrium (RA) function is altered in rTVD but not in RHO, which could contribute to differences in outcomes...
April 11, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28409231/preoperative-right-ventricular-dysfunction-is-a-strong-predictor-of-3%C3%A2-years-survival-after-cardiac-surgery
#8
Jérôme Peyrou, Christophe Chauvel, Atul Pathak, Marc Simon, Patrick Dehant, Eric Abergel
BACKGROUND: Prognostic value of right ventricular (RV) systolic function is well established in valvular disease, heart failure but has not been evaluated in patients undergoing cardiac surgery. OBJECTIVES: The aim of the present study was to evaluate the prognostic value of preoperative RV dysfunction extensively evaluated on the basis of a large set of echocardiographic parameters [S', RV fractional area change (RVFAC), right myocardial performance index (RMPI), isovolumic acceleration (IVA), RV dP/dt and basal longitudinal strain (BLS)] in a large population of unselected patient awaiting cardiac surgery...
April 13, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28407402/cirrhotic-cardiomyopathy-implications-for-liver-transplantation
#9
REVIEW
Hongqun Liu, Saumya Jayakumar, Mouhieddin Traboulsi, Samuel S Lee
The majority of the patients on a waiting list for liver transplantation have end-stage liver disease. Due to the marked peripheral vasodilatation of end stage cirrhosis that masks a latent myocardial dysfunction, cardiac abnormalities in the resting state are usually subclinical and escape the attention of physicians. However, when challenged, the systolic and diastolic contractile responses are attenuated. In addition to these contractile abnormalities, morphological changes such as enlargement or hypertrophy of cardiac chambers and electrophysiological repolarization changes including a prolonged QT interval can be observed...
April 13, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28398019/epidemiology-anatomy-pathophysiology-and-clinical-evaluation-of-functional-tricuspid-regurgitation
#10
Yee-Ping Sun, Patrick T O' Gara
Tricuspid regurgitation (TR) is commonly encountered in the management of patients with a variety of cardiovascular diseases. Primary TR is the result of structural abnormalities of the valve or chordal attachments whereas functional TR results from alterations in right ventricular (RV) or right atrial (RA) size, shape or function. The vast majority of TR cases seen in practice are functional in nature and usually results from left-sided heart disease (e.g., mitral valve disease, left ventricular (LV) systolic dysfunction) and/or pulmonary vascular disease, though it also manifests in the presence of isolated chronic atrial fibrillation (AF)...
April 10, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28393781/comparison-of-levosimendan-versus-dobutamine-in-patients-with-moderate-to-severe-left-ventricular-dysfunction-undergoing-off-pump-coronary-artery-bypass-grafting-a-randomized-prospective-study
#11
Ashok Kandasamy, Hariharan Antony Simon, P Murthy, Mahalakshmi Annadurai, Mushkath Mohamed Ali, Gayathri Ramanathan
CONTEXT: Recent upsurge in referral of patients with compromised left ventricular (LV) function for cardiac surgery has led to an increasing use inotropes to achieve improvement of tissue perfusion in the perioperative period. AIMS AND OBJECTIVES: To compare the hemodynamic effects and immediate postoperative outcomes with levosimendan and dobutamine in patients with moderate to severe LV dysfunction undergoing off-pump coronary artery bypass grafting (OPCAB). SETTINGS AND DESIGN: University teaching hospital, randomized control study...
April 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28392314/persistence-and-proliferation-of-human-mesenchymal-stromal-cells-in-the-right-ventricular-myocardium-after-intracoronary-injection-in-a-large-animal-model-of-pulmonary-hypertension
#12
Roza Badr Eslam, Kevin Croce, Fernanda Marinho Mangione, Robert Musmann, Jane A Leopold, Richard N Mitchell, Aaron B Waxman
BACKGROUND AIMS: In this study, we demonstrate long-term persistence of human mesenchymal stromal cells (hMSCs) after intracoronary injection in a large animal model of pulmonary hypertension (PH). METHODS: Commercially available placenta-derived hMSCs were used. Experiments were conducted on 14 female Yorkshire swine. Four animals served as controls, and 10 underwent pulmonary vein (PV) banding. After 12 ± 2 weeks, PH and PV dysfunction were confirmed by right heart catheterization and cardiac magnetic resonance imaging...
April 6, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28391990/relation-of-n-terminal-pro-b-type-natriuretic-peptide-and-left-ventricular-diastolic-function-to-exercise-tolerance-in-patients-with-significant-valvular-heart-disease-and-normal-left-ventricular-systolic-function
#13
Ji-Won Hwang, Sung-Ji Park, Eun Jeong Cho, Eun Kyoung Kim, Ga Yeon Lee, Sung-A Chang, Jin-Oh Choi, Sang-Chol Lee, Seung Woo Park
An association between N-terminal prohormone brain natriuretic peptide (NT-proBNP) and exercise tolerance in patients with valvular heart disease (VHD) has been suggested; however, there are few data available regarding this relation. The aim of this study is to evaluate the correlation between exercise tolerance and NT-proBNP in patients with asymptomatic or mildly symptomatic significant VHD and normal left ventricular ejection fraction (LV EF). A total of 96 patients with asymptomatic or mildly symptomatic VHD and normal LV EF (≥50%) underwent cardiopulmonary exercise echocardiography...
March 16, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28391633/comparisons-of-cardioprotective-efficacy-between-fibroblast-growth-factor-21-and-dipeptidyl-peptidase-4-inhibitor-in-pre-diabetic-rats
#14
Pongpan Tanajak, Piangkwan Sa-Nguanmoo, Nattayaporn Apaijai, Xiaojie Wang, Guang Liang, Xiaokun Li, Chao Jiang, Siriporn C Chattipakorn, Nipon Chattipakorn
AIMS: Comparative efficacy between fibroblast growth factor 21 (FGF21) and vildagliptin on metabolic regulation, cardiac mitochondrial function, heart rate variability (HRV) and left ventricular (LV) function is not known. We hypothesized that FGF21 and vildagliptin share a similar efficacy in improving these parameters in high-fat diet (HFD) induced obese-insulin resistant rats. METHODS: Twenty-four male Wistar rats were fed with either a normal diet (ND) or a HFD for 12 weeks...
April 9, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28390683/prognostic-utility-of-right-ventricular-free-wall-strain-in-low-risk-patients-after-orthotopic-heart-transplantation
#15
Amr F Barakat, Brett W Sperry, Randall C Starling, Amgad Mentias, Zoran B Popovic, Brian P Griffin, Milind Y Desai
Global longitudinal strain (GLS) by speckle-tracking echocardiography is a sensitive measure of regional left and right ventricular (LV and RV) dysfunction, before onset of overt systolic dysfunction. We sought to evaluate the prognostic utility of measuring LV-GLS and RV free wall strain (FWS) in low risk patients at 1 year after orthotopic heart transplantation (OHT). We retrospectively studied 96 OHT recipients (age 52 ± 14 years, 64% men) free of antibody-mediated rejection or moderate to severe coronary allograft vasculopathy (CAV, grade 2 to 3) at 1 year after transplant...
March 15, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28387860/prolonged-central-circulation-transit-time-in-patients-with-hfpef-and-hfref-by-magnetic-resonance-imaging
#16
Jie J Cao, Laura Li, Jeannette McLaughlin, Michael Passick
Aims: Prolonged central circulation transit time (TT) has long been associated with heart failure (HF) and left ventricular (LV) dysfunction. In this study, we assessed the central circulation TT using cardiovascular magnetic resonance imaging (CMR) in patients with HF of preserved ejection fraction (HFpEF) and of reduced EF (HFrEF) and investigated its relation to haemodynamics. Methods and results: Fifty eight prospectively recruited volunteers underwent CMR. TT was taken as the time between the peaks of time-intensity curves from first pass perfusion images and normalized to cardiac cycle length intervals...
April 6, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28387033/non-invasive-measurement-of-right-atrial-pressure-by-near-infrared-spectroscopy-preliminary-experience-a-report-from-the-sica-hf-study
#17
Pierpaolo Pellicori, Andrew L Clark, Anna Kallvikbacka-Bennett, Jufen Zhang, Alessia Urbinati, Luca Monzo, Riet Dierckx, Stefan D Anker, John G F Cleland
AIMS: To assess the clinical value of measuring right atrial pressure (RAP) using near-infrared spectroscopy (NIRS) in patients with chronic heart failure (CHF). METHODS AND RESULTS: RAP was measured non-invasively using NIRS over the external jugular vein (Venus 1000, Mespere LifeSciences, Canada) in ambulatory patients with CHF enrolled in the Studies Investigating Co-morbidities Aggravating Heart Failure (SICA-HF) programme. Comparing 243 patients with CHF (mean age 71 years; mean left ventricular ejection fraction (LVEF) 45%, median NT-proBNP 788 ng/L) to 49 controls (NT-proBNP ≤125 ng/L), RAP was 7 [interquartile range (IQR) 4-11] mmHg vs...
April 6, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28385408/tricuspid-regurgitation-does-not-impact-right-ventricular-remodeling-after-percutaneous-pulmonary-valve%C3%A2-implantation
#18
Daniel Tanase, Peter Ewert, Stanimir Georgiev, Christian Meierhofer, Jelena Pabst von Ohain, Doff B McElhinney, Alfred Hager, Andreas Kühn, Andreas Eicken
OBJECTIVES: This study sought to investigate the impact of tricuspid regurgitation (TR) on right ventricular function after percutaneous pulmonary valve implantation (PPVI). BACKGROUND: PPVI provides a less invasive alternative to surgery in patients with right ventricular-to-pulmonary artery (RV-PA) conduit dysfunction. Recovery of the right ventricle has been described after PPVI for patients with pulmonary stenosis and for those with pulmonary regurgitation. Additional TR enforces RV dysfunction by supplemental volume overload...
April 10, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28381470/evidence-supporting-the-existence-of-a-distinct-obese-phenotype-of-heart-failure-with-preserved-ejection-fraction
#19
Masaru Obokata, Yogesh N V Reddy, Sorin V Pislaru, Vojtech Melenovsky, Barry A Borlaug
Background -Heart failure (HF) with preserved ejection fraction (HFpEF) is a heterogeneous syndrome. Phenotyping patients into pathophysiologically homogenous groups may enable better targeting of treatment. Obesity is common in HFpEF and has many cardiovascular effects, suggesting it may be a viable candidate for phenotyping. We compared cardiovascular structure, function, and reserve capacity in subjects with obese HFpEF, non-obese HFpEF, and controls. Methods -Subjects with obese HFpEF (BMI≥35kg/m(2), n=99), non-obese HFpEF (BMI<30kg/m(2), n=96), and non-obese controls free of HF (n=71) underwent detailed clinical assessment, echocardiography and invasive hemodynamic exercise testing...
April 5, 2017: Circulation
https://www.readbyqxmd.com/read/28374415/biventricular-function-on-early-echocardiograms-in-neonatal-hypoxic-ischemic-encephalopathy
#20
Sanjeev Aggarwal, Girija Natarajan
AIM: To compare early (<24 hours) echocardiograms (ECHOs) in infants with perinatal hypoxic-ischemic encephalopathy (HIE) undergoing a)therapeutic hypothermia (TH) b) normothermia and c) normal controls. METHODS: This was a single center retrospective review of clinical early ECHOs of term infants with moderate or severe HIE and controls (with a normal ECHO <72 hours of age). Right (RVO) and left ventricular output (LVO), RV and LV myocardial performance index (MPI), systolic to diastolic duration ratio (S/D) and eccentricity indices (EI) in systole and diastole were compared using ANOVA...
April 4, 2017: Acta Paediatrica
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