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Right ventricular dysfunction

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https://www.readbyqxmd.com/read/28345131/effect-of-botulinum-toxin-on-inducibility-and-maintenance-of-atrial-fibrillation-in-ovine-myocardial-tissue
#1
Alireza Nazeri, Anand V Ganapathy, Ali Massumi, Mehran Massumi, Egemen Tuzun, Raymond Stainback, Ana-Maria Segura, Macarthur A Elayda, Mehdi Razavi
BACKGROUND: Aberrant vagal stimulation may promote the generation and propagation of atrial fibrillation (AF). Researchers have suggested that botulinum toxin (BTX), a neurotoxin that decreases neural vagal stimulation, may decrease the incidence of postoperative AF. The exact electrophysiologic mechanism underlying the observations and histopathologic alterations associated with BTX are unclear. OBJECTIVE: To investigate the electrophysiologic, functional, and histopathologic effects of BTX on fibrillation induction in ovine atria...
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28344611/percutaneous-pulmonary-valve-implantation-state-of-the-art-and-polish-experience
#2
REVIEW
Elżbieta K Biernacka, Witold Rużyłło, Marcin Demkow
Percutaneous pulmonary valve implantation (PPVI) is a relatively new method of treating patients with right ventricular outflow tract (RVOT) dysfunction after surgical repair of congenital heart disease. Since its introduction in 2000 by Bonhoeffer, more than ten thousand PPVI procedures have been performed worldwide. Indications for PPVI have been adapted from those accepted for surgical intervention. Two types of valves are being used: Melody Medtronic available in diameters 16 mm and 18 mm and the family of Edwards SAPIEN valves 23, 26 and 29...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28343949/lactate-and-echocardiography-before-veno-venous-extracorporeal-membrane-oxygenation-support
#3
Chiara Lazzeri, Manuela Bonizzoli, Giovanni Cianchi, Stefano Batacchi, Paolo Terenzi, Morena Cozzolino, Pasquale Bernardo, Adriano Peris
BACKGROUND: Lactate has been recognised as a prognostic factor in several critical conditions. Veno-Venous Extracorporeal Membrane Oxygenation (VV-ECMO) is a well-established therapy in patients with Acute Respiratory Disease Syndrome (ARDS) unresponsive to conventional therapy and echocardiography pre ECMO initiation has been recently reported to help in risk stratifying these patients. METHODS: We assessed whether the detection of hyperlactataemia could be associated with the presence of left ventricle (LV) or right ventricle (RV) dysfunction in 121 consecutive patients with refractory ARDS...
March 14, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28341033/stress-echocardiographic-evaluation-for-d-transposition-of-the-great-arteries-after-atrial-redirection-unmasking-early-signs-of-myocardial-dysfunction-and-baffle-stenosis
#4
Merav Dvir-Orgad, Meera Anand, Astrid M De Souza, Mary T Zadorsky, Marla C Kiess, James E Potts, George G S Sandor
BACKGROUND: The authors used semisupine cycle ergometry stress echocardiography to assess cardiac function and unmask baffle stenosis in patients with d-transposition of the great arteries after atrial redirection surgery. METHODS: This was a retrospective review of semisupine cycle ergometry stress echocardiography performed in 53 patients (64% male; mean age, 24.0 years; 90% Mustard procedure) and 56 healthy control subjects. Incremental exercise to volitional fatigue was performed...
January 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28337558/improving-on-the-diagnostic-characteristics-of-echocardiography-for-pulmonary-hypertension
#5
Kathleen Broderick-Forsgren, Clemontina A Davenport, Joseph A Sivak, Charles William Hargett, Michael C Foster, Andrew Monteagudo, Alicia Armour, Sudarshan Rajagopal, Kristine Arges, Eric J Velazquez, Zainab Samad
This retrospective study evaluated the diagnostic characteristics of a combination of echocardiographic parameters for pulmonary hypertension (PH). Right ventricular systolic pressure (RVSP) estimation by echocardiography (echo) is used to screen for PH. However, the sensitivity of this method is suboptimal. We hypothesized that RVSP estimation in conjunction with other echo parameters would improve the value of echo for PH. The Duke Echo database was queried for adult patients with known or suspected PH who had undergone both echo and right heart catheterization (RHC) within a 24 h period between 1/1/2008 and 12/31/2013...
March 24, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28335835/impact-of-thrombolytic-therapy-on%C3%A2-the%C3%A2-long-term-outcome-of-intermediate-risk-pulmonary%C3%A2-embolism
#6
Stavros V Konstantinides, Eric Vicaut, Thierry Danays, Cecilia Becattini, Laurent Bertoletti, Jan Beyer-Westendorf, Helene Bouvaist, Francis Couturaud, Claudia Dellas, Daniel Duerschmied, Klaus Empen, Emile Ferrari, Nazzareno Galiè, David Jiménez, Maciej Kostrubiec, Matija Kozak, Christian Kupatt, Irene M Lang, Mareike Lankeit, Nicolas Meneveau, Massimiliano Palazzini, Piotr Pruszczyk, Matteo Rugolotto, Aldo Salvi, Olivier Sanchez, Sebastian Schellong, Bozena Sobkowicz, Guy Meyer
BACKGROUND: The long-term effect of thrombolytic treatment of pulmonary embolism (PE) is unknown. OBJECTIVES: This study investigated the long-term prognosis of patients with intermediate-risk PE and the effect of thrombolytic treatment on the persistence of symptoms or the development of late complications. METHODS: The PEITHO (Pulmonary Embolism Thrombolysis) trial was a randomized (1:1) comparison of thrombolysis with tenecteplase versus placebo in normotensive patients with acute PE, right ventricular (RV) dysfunction on imaging, and a positive cardiac troponin test result...
March 28, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28332221/right-ventricular-free-wall-longitudinal-speckle-tracking-strain-in-patients-with-pulmonary-arterial-hypertension-under-specific-treatment
#7
Hatice S Kemal, Meral Kayikcioglu, Hakan Kultursay, Ozcan Vuran, Sanem Nalbantgil, Nesrin Mogulkoc, Levent Can
BACKGROUND: Right ventricular (RV) dysfunction is a major determinant of outcomes in patients with pulmonary arterial hypertension (PAH), although the optimal measure of RV function is poorly defined. We evaluated the utility of RV free-wall speckle tracking strain as an assessment tool for RV function in patients with PAH who are already under specific treatment compared with conventional echocardiographic parameters and investigated the relationship of RV free-wall strain with clinical hemodynamic parameters of RV performance...
March 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28331450/pulmonary-thromboendarterectomy-for-pulmonary-hypertension-before-considering-transplant
#8
Hannah Kooperkamp, Inder Mehta, David Fary, Michael Bates
BACKGROUND: In cases of chronic thromboembolic pulmonary hypertension (CTEPH), referral for possible surgical intervention is important because surgery can be curative. Surgery necessitates cardiopulmonary bypass and deep circulatory arrest with pulmonary thrombectomy and bilateral endarterectomy (PTE). If surgery fails, lung transplant is the next best surgical option. Medical treatment is also an important adjunct. CASE REPORT: A 35-year-old female presented 3 months after a pulmonary embolus was found to be completely occluding her left pulmonary artery...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28329232/mid-term-results-of-bilateral-lung-transplant-with-postoperatively-extended-intraoperative-extracorporeal-membrane-oxygenation-for-severe-pulmonary-hypertension%C3%A2
#9
Jawad Salman, Fabio Ius, Wiebke Sommer, Thierry Siemeni, Christian Kuehn, Murat Avsar, Dietmar Boethig, Ulrich Molitoris, Christoph Bara, Jens Gottlieb, Tobias Welte, Axel Haverich, Marius M Hoeper, Gregor Warnecke, Igor Tudorache
OBJECTIVES: In severe pulmonary hypertension, diastolic dysfunction of the left ventricle causes significant morbidity and mortality after lung transplantation, which may be successfully reversed using a protocol based on perioperative veno-arterial extracorporeal membrane oxygenation (ECMO) and early extubation. Here, we present echocardiographic data and mid-term outcomes. METHODS: The records of lung transplanted patients at our institution between May 2010 and January 2016 were retrospectively reviewed...
March 2, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28329164/large-animal-model-of-functional-tricuspid-regurgitation-in-pacing-induced-end-stage-heart-failure
#10
Marcin Malinowski, Alistair G Proudfoot, David Langholz, Lenora Eberhart, Michael Brown, Hans Schubert, Jeremy Wodarek, Tomasz A Timek
OBJECTIVES: Functional tricuspid regurgitation (FTR) is common in patients with advanced heart failure and frequently complicates left ventricular assist device implantation yet remains poorly understood. We set out to establish large animal model of FTR that could serve as a research platform to investigate the pathogenesis of FTR associated with end-stage heart failure. METHODS: : Through right thoracotomy, ten adult sheep underwent implantation of pacemaker with epicardial LV lead, five sonomicrometry crystals on the right ventricle, and left and right ventricular telemetry pressure sensors during a beating heart off-pump procedure...
February 21, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329100/long-term-cardiovascular-changes-following-creation-of-arteriovenous-fistula-in-patients-with-end-stage-renal-disease
#11
Yogesh N V Reddy, Masaru Obokata, Patrick G Dean, Vojtech Melenovsky, Karl A Nath, Barry A Borlaug
Aims: Short-term studies have reported left ventricular (LV) dilatation following surgical creation of arteriovenous fistulas (AVF) or arteriovenous grafts (AVGs), but chronic cardiac structural and functional changes have not been examined or related to clinical outcomes following AVF/AVG. We sought to characterize the long-term changes in cardiac structure and function in patients undergoing shunt creation for haemodialysis. Methods and results: A retrospective analysis was performed of patients undergoing echocardiography before and after surgical AVF/AVG creation for the initiation of haemodialysis...
March 6, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28321539/secoisolariciresinol-diglucoside-attenuates-cardiac-hypertrophy-and-oxidative-stress-in-monocrotaline-induced-right-heart-dysfunction
#12
Stephanie Puukila, Rafael Oliveira Fernandes, Patrick Türck, Cristina Campos Carraro, Jéssica Hellen Poletto Bonetto, Bruna Gazzi de Lima-Seolin, Alex Sander da Rosa Araujo, Adriane Belló-Klein, Douglas Boreham, Neelam Khaper
Pulmonary arterial hypertension (PAH) occurs when remodeling of pulmonary vessels leads to increased pulmonary vascular resistance resulting in increased pulmonary arterial pressure. Increased pulmonary arterial pressure results in right ventricle hypertrophy and eventually heart failure. Oxidative stress has been implicated in the pathogenesis of PAH and may play a role in the regulation of cellular signaling involved in cardiac response to pressure overload. Secoisolariciresinol diglucoside (SDG), a component from flaxseed, has been shown to reduce cardiac oxidative stress in various pathophysiological conditions...
March 20, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28320896/estrogen-maintains-mitochondrial-content-and-function-in-the-right-ventricle-of-rats-with-pulmonary-hypertension
#13
Aiping Liu, Jennifer Philip, Kalyan C Vinnakota, Francoise Van den Bergh, Diana M Tabima, Timothy Hacker, Daniel A Beard, Naomi C Chesler
The typical cause of death in pulmonary hypertension (PH) is right ventricular (RV) failure, with females showing better survival rates than males. Recently, metabolic shift and mitochondrial dysfunction have been demonstrated in RV failure secondary to PH In light of evidence showing that estrogen protects mitochondrial function and biogenesis in noncardiovascular systems, we hypothesized that the mechanism by which estrogen preserves RV function is via protection of mitochondrial content and oxidative capacity in PH We used a well-established model of PH (Sugen+Hypoxia) in ovariectomized female rats with/without estrogen treatment...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28317170/added-clinical-value-of-applying-myocardial-deformation-imaging-to-assess-right-ventricular-function
#14
REVIEW
Vladislavs Sokalskis, Diletta Peluso, Annika Jagodzinski, Christoph Sinning
Right heart dysfunction has been found to be a strong prognostic factor predicting adverse outcome in various cardiopulmonary diseases. Conventional echocardiographic measurements can be limited by geometrical assumptions and impaired reproducibility. Speckle tracking-derived strain provides a robust quantification of right ventricular function. It explicitly evaluates myocardial deformation, as opposed to tissue Doppler-derived strain, which is computed from tissue velocity gradients. Right ventricular longitudinal strain provides a sensitive tool for detecting right ventricular dysfunction, even at subclinical levels...
March 19, 2017: Echocardiography
https://www.readbyqxmd.com/read/28317064/altered-synchrony-of-right-ventricular-contraction-in-borderline-pulmonary-hypertension
#15
Bouchra Lamia, Jean-François Muir, Luis-Carlos Molano, Catherine Viacroze, Jacques Benichou, Philippe Bonnet, Jean Quieffin, Antoine Cuvelier, Robert Naeije
Imaging studies have shown that pulmonary hypertension (PH) is associated with inhomogenous right ventricular (RV) regional contraction, or dyssynchrony, and that this is of prognostic relevance. This study aimed at the identification and functional significance of RV dyssynchrony in borderline PH defined by a mean pulmonary artery pressure between (mPAP) 20 and 25 mmHg. RV dyssynchrony was measured by 2-dimensional speckle tracking echocardiography in 17 patients with pulmonary arterial hypertension (PAH), 13 patients with borderline PH and 14 controls...
March 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28316327/obstructive-primary-cardiac-t-cell-lymphoma-a-case-report-from-senegal
#16
Simon Antoine Sarr, Abdou Majib Gaye, Fatou Aw, Jean de Dieu Nzambaza, Malick Bodian, Kana Babaka, Mouhamadou Bamba Ndiaye, Adama Kane, Maboury Diao, Serigne Abdou Ba
BACKGROUND Cardiac lymphoma is a rare entity, defined by the non-extra cardiac location at diagnosis. CASE REPORT Our patient was a 32-year-old female with no particular medical history, who presented with right heart failure with recurrent ascites and pleural effusion. There was a progressive worsening exertional dyspnea. On admission, examination revealed an irregular tachycardia at 170 beats per minute (bpm) and congestive heart failure. The electrocardiogram scored full tachyarrhythmia by atrial fibrillation with an average ventricular rate of 179 cycles per minute...
March 20, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28316086/cardiac-fibrosis-in-the-ageing-heart-contributors-and-mechanisms
#17
Lu Lu, Jingbin Guo, Yue Hua, Kevin Huang, Ruth Magaye, Jake Cornell, Darren J Kelly, Christopher Reid, Danny Liew, Yingchun Zhou, Aihua Chen, Wei Xiao, Qiang Fu, Bing Hui Wang
Cardiac fibrosis refers to an excessive deposition of extracellular matrix (ECM) in cardiac tissue. Fibrotic tissue is stiffer and less compliant, resulting in subsequent cardiac dysfunction and heart failure. Cardiac fibrosis in the ageing heart may involve activation of fibrogenic signalling and inhibition of anti-fibrotic signalling, leading to an imbalance of ECM turnover. Excessive accumulation of ECM such as collagen in older patients contributes to progressive ventricular dysfunction. Overexpression of collagen is derived from various sources, including higher levels of fibrogenic growth factors, proliferation of fibroblasts and cellular trans-differentiation...
March 18, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28315942/forgotten-right-ventricle-in-pediatric-dilated-cardiomyopathy
#18
Hala Mounir Agha, Hossam Ibrahim, Inas Abd El Satar, Naglae Abd El Rahman, Doaa Abd El Aziz, Zeinab Salah, Sonia El Saeidi, Fatma Mostafa, Wael Attia, Mohamed Abd El Rahman, Gaser Abd El Mohsen
To evaluate the right ventricular (RV) function in relation to that of the left ventricle (LV) in patients with dilated cardiomyopathy (DCM). Echocardiographic examination was done using tissue Doppler imaging (TDI) and two-dimensional speckle tracking echocardiography (2D-STE) for 32 pediatric patients with DCM comparing them to another 32 normal matched controls. The global longitudinal strain (GLS) derived from 2D-STE was used to reflect the LV systolic function. Tricuspid annular plan systolic excursion (TAPSE) and the following RV TDI derived indexes: peak systolic velocity (S'), peak early diastolic velocity E', peak late diastolic velocity A', isovolumic acceleration (IVA) and myocardial performance index (MPI) were measured...
March 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28314540/technological-advances-shed-light-on-left-ventricular-cardiac-disturbances-in-cystic-fibrosis
#19
REVIEW
Zahra N Sayyid, Zachary M Sellers
Cystic fibrosis (CF), the most common autosomal recessive lethal disease in Caucasians, causes chronic pulmonary disease and can lead to cor pulmonale with right ventricular dysfunction. The presence of the cystic fibrosis transmembrane conductance regulator (CFTR) in cardiac myocardia has prompted debate regarding possible defective ion channel-induced cardiomyopathy. Clinical heart disease in CF is considered rare and is restricted to case reports. It has been unclear if this is due to the lack of physiological importance of CFTR in the heart, the relatively short lifespan of those with CF, or a technical inability to detect subclinical disease...
March 14, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28314080/brain-natriuretic-peptide-and-right-heart-dysfunction-after-heart-transplantation
#20
REVIEW
Samy Talha, Anne Charloux, François Piquard, Bernard Geny
Heart transplantation (HT) should normalize cardiac endocrine function but brain natriuretic peptide (BNP) levels remain elevated after HT, even in the absence of left ventricular haemodynamic disturbance or allograft rejection. Right ventricle (RV) abnormalities are common in HT recipients (HTx), as a result of engraftment process, tricuspid insufficiency and/or repeated inflammation due to iterative endomyocardial biopsies. RV function follow-up is vital for patient management since RV dysfunction is a recognized cause of in-hospital death and is responsible for a worse prognosis...
March 17, 2017: Clinical Transplantation
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