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Right heart failure

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https://www.readbyqxmd.com/read/29677206/synergistic-interaction-between-a-pde5-inhibitor-sildenafil-and-a-new-adenosine-a2a-receptor-agonist-lassbio-1359-improves-pulmonary-hypertension-in-rats
#1
Allan K Alencar, Fábio I Carvalho, Ananssa M Silva, Sabrina T Martinez, Jorge A Calasans-Maia, Carlos M Fraga, Eliezer J Barreiro, Gisele Zapata-Sudo, Roberto T Sudo
INTRODUCTION: Pulmonary hypertension (PH) is characterized by enhanced pulmonary vascular resistance, which causes right ventricle (RV) pressure overload and results in right sided heart failure and death. This work investigated the effectiveness of a combined therapy with PDE5 inhibitor (PDE5i) and a new adenosine A2A receptor (A2AR) agonist in mitigating monocrotaline (MCT) induced PH in rats. METHODS: An in vitro isobolographic analysis was performed to identify possible synergistic relaxation effect between sildenafil and LASSBio 1359 in rat pulmonary arteries (PAs)...
2018: PloS One
https://www.readbyqxmd.com/read/29676644/air-pollution-exposure-with-fine-dust-responses-in-the-pulmonary-vasculature-and-the-right-heart
#2
Nedim Durmus, Gabriele Grunig
Detrimental effects of air pollution with fine dust (particulate matter ≤2.5 μm in aerodynamic diameter, or PM2.5 ) on the systemic circulation and the left heart have been studied intensely during the past decade. In comparison, knowledge regarding the effects of exposure to air pollution with PM2.5 on the pulmonary vasculature and the right heart lags far behind. A report on severe lung disease and right heart failure in coal miners was published nearly 170 years ago. However, today, we still do not have a clear picture of how the effect of air pollution on the pulmonary circulation or the right heart should be viewed from a clinical, mechanistic biological, therapeutic, or economic angle...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29675897/the-penumbral-role-of-beta-blockade-on-heart-rate-recovery-in-heart-failure
#3
Alan Pan
We would like to thank Bharadwaj et al. for their 2017 publication which provides robust evidence that subacute pyridostigmine administration heightens heart rate recovery (HRR) by augmenting cholinergic stimulus to the heart, thereby increasing parasympathetic tonus in heart failure (HF).1 Findings on HRR in the human population, which were published by another group in 20162 and correlate diminished HRR with HF mortality, belie what we truly know concerning the nebulous role that parasympathetic activation plays relative to standard therapy in HF...
April 19, 2018: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29673908/mechanism-underlying-the-contractile-activity-of-utp-in-the-mammalian-heart
#4
Ulrich Gergs, Daniel Rothkirch, Britt Hofmann, Hendrik Treede, Bernard Robaye, Andreas Simm, Christa E Müller, Joachim Neumann
We previously reported that uridine 5'-triphosphate (UTP), a pyrimidine nucleoside triphosphate produced a concentration- and time-dependent increase in the contraction force in isolated right atrial preparations from patients undergoing cardiac bypass surgery due to angina pectoris. The stimulation of the force of contraction was sustained rather than transient. In the present study, we tried to elucidate the underlying receptor and signal transduction for this effect of UTP. Therefore, we measured the effect of UTP on force of contraction, phosphorylation of p38 and ERK1/2, in human atrial preparations, atrial preparations from genetically modified mice, cardiomyocytes from adult mice and cardiomyocytes from neonatal rats...
April 16, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29673504/usefulness-of-tricuspid-annular-diameter-to-predict-late-right-sided-heart-failure-in-patients-with-left-ventricular-assist-device
#5
Koki Nakanishi, Shunichi Homma, Jiho Han, Hiroo Takayama, Paolo C Colombo, Melana Yuzefpolskaya, Arthur R Garan, Maryjane A Farr, Paul Kurlansky, Marco R Di Tullio, Yoshifumi Naka, Koji Takeda
Although late-onset right-sided heart failure is recognized as a clinical problem in the treatment of patients with left ventricular assist devices (LVADs), the mechanism and predictors are unknown. Tricuspid valve (TV) deformation leads to the restriction of the leaflet motion and decreased coaptation, resulting in a functional tricuspid regurgitation that may act as a surrogate marker of late right-sided heart failure. This study aimed to investigate the association of preoperative TV deformation (annulus dilatation and leaflet tethering) with late right-sided heart failure development after continuous-flow LVAD implantation...
March 28, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29673103/allopurinol-and-endothelial-function-a-systematic-review-with-meta-analysis-of-randomized-controlled-trials
#6
Manal M Alem
AIM: Oxidative stress and endothelial dysfunction are two inter-related conditions commonly seen in patients with cardiovascular risk factors. The enzyme, xanthine oxidase, is an important contributor to these phenomena but to a variable degree in different patient populations. This meta-analysis will summarize the effect of allopurinol, an established xanthine oxidase inhibitor, on endothelial function among patients with different co-morbidities. METHODS: Medline Complete, PubMed, ProQuest, ClinicalKey, Wiley Online Library and Cochrane Central Register of Controlled Trials were searched till 29th July, 2017...
April 19, 2018: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/29670531/beat-to-beat-variability-of-ventricular-action-potential-duration-oscillates-at-low-frequency-during-sympathetic-provocation-in-humans
#7
Bradley Porter, Stefan van Duijvenboden, Martin J Bishop, Michele Orini, Simon Claridge, Justin Gould, Benjamin J Sieniewicz, Baldeep Sidhu, Reza Razavi, Christopher A Rinaldi, Jaswinder S Gill, Peter Taggart
Background: The temporal pattern of ventricular repolarization is of critical importance in arrhythmogenesis. Enhanced beat-to-beat variability (BBV) of ventricular action potential duration (APD) is pro-arrhythmic and is increased during sympathetic provocation. Since sympathetic nerve activity characteristically exhibits burst patterning in the low frequency range, we hypothesized that physiologically enhanced sympathetic activity may not only increase BBV of left ventricular APD but also impose a low frequency oscillation which further increases repolarization instability in humans...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29669970/prognostic-relevance-of-liver-stiffness-assessed-by-transient-elastography-in-patients-with-acute-decompensated-heart-failure
#8
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/29668926/right-atrial-and-ventricular-echocardiographic-strain-analysis-predicts-requirement-for-right-ventricular-support-after-left-ventricular-assist-device-implantation
#9
Dafni Charisopoulou, Nicholas R Banner, Camil Demetrescu, Andre R Simon, Shelley Rahman Haley
Aims: The need for right ventricular assist device (RVAD) support after left ventricular assist device (LVAD) therapy is associated with increased morbidity and mortality. We used 2D echocardiographic strain analysis to assess right atrial (RA) and right ventricular (RV) mechanics and predict the need for RV mechanical support after LVAD implantation. Methods and results: Seventy advanced chronic heart failure (ACHF) patients [59 male, age 47 ± 12 years, 79% dilated cardiomyopathy, left ventricular ejection fraction 23 ± 10%] received continuous-flow LVAD as a bridge to transplantation over an 18 month period...
April 13, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29666089/massive-right-atrial-myxoma-presenting-as-congestive-heart-failure-an-unusual-presentation-of-a-rare-tumour
#10
Richa Agrawal, Ajay Sharma, Ranjit Kumar Nath, Bhagya Narayan Pandit
Cardiac myxomas are the most common type of primary cardiac tumour. The most common location of cardiac myxoma is left atrium. Right atrial myxomas are very rare and usually asymptomatic or sometimes present with dyspnoea. Right atrial myxoma presenting as a right-sided heart failure is very rare. We report a very rare case of a 52-year-old man of right atrial myxoma presented unsually as right-sided heart failure.
April 17, 2018: BMJ Case Reports
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
#11
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/29664415/model-based-optimal-multipolar-stimulation-without-a-priori-knowledge-of-nerve-structure-application-to-vagus-nerve-stimulation
#12
Melissa Dali, Olivier Rossel, David Andreu, Laure Laporte, Alfredo Hernandez, Jeremy Laforet, Eloi Marijon, Albert Hagège, Maureen Clerc, Christine Henry, David Guiraud
OBJECTIVE: Multipolar cuff electrode can selectively stimulate areas of peripheral nerves and therefore enable to control independent functions. However, the branching and fascicularization are known for a limited set of nerves and the specific organization remains subject-dependent. This paper presents a general modeling and optimization methods in the context of multipolar stimulation using a cuff electrode without a priori knowledge of the nerve structure. Vagus nerve stimulation experiments based on the optimization results were then investigated...
April 17, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29663677/the-carotid-sinus-nerve-structure-function-and-clinical-implications
#13
Andrea Porzionato, Veronica Macchi, Carla Stecco, Raffaele De Caro
Interest has been renewed in the anatomy and physiology of the carotid sinus nerve (CSN) and its targets (carotid sinus and carotid body), due to recent proposals of surgical procedures for a series of common pathologies, such as carotid sinus syndrome, hypertension, heart failure and insulin resistance. The CSN originates from the glossopharyngeal nerve soon after its appearance from the jugular foramen. It shows frequent communications with the sympathetic trunk (usually at the level of the superior cervical ganglion) and the vagal nerve (main trunk, pharyngeal branches or superior laryngeal nerve)...
April 16, 2018: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29663522/tricuspid-valve-endocarditis-in-the-era-of-the-opioid-epidemic
#14
Tyler J Wallen, Wilson Szeto, Matthew Williams, Pavan Atluri, George Arnaoutakis, Marci Fults, Ibrahim Sultan, Nimesh Desai, Michael Acker, Prashanth Vallabhajosyula
BACKGROUND AND AIM: We reviewed our institutional experience with tricuspid valve endocarditis to understand the impact of the opioid epidemic on the incidence of right heart endocarditis. METHODS: We retrospectively reviewed all cases of tricuspid endocarditis managed surgically from January of 2011 to May of 2017. There were no exclusion criteria. RESULTS: A total of 126 patients were identified. There were seven cases in 2011 and 36 in 2016...
April 16, 2018: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/29663123/creation-of-a-restrictive-atrial-communication-in-heart-failure-with-preserved-and-mid-range-ejection-fraction-effective-palliation-of-left-atrial-hypertension-and-pulmonary-congestion
#15
Anna Bauer, Markus Khalil, Monika Lüdemann, Jürgen Bauer, Anoosh Esmaeili, Roberta De-Rosa, Norbert F Voelkel, Hakan Akintuerk, Dietmar Schranz
BACKGROUND: Left atrial decompression is considered in patients with symptomatic heart failure with preserved ejection fraction (HFpEF). We aimed to evaluate the feasibility and efficacy of transcatheter generation of a restrictive atrial septum communication to manage HFpEF from infancy to adulthood with cardiomyopathy and congenital heart defect. METHODS AND RESULTS: From June 2009 to December 2016, 24 patients (50% with an age less than 16 years) with HFpEF were palliated; NYHA-/Ross class IV (n = 10); median systemic ventricular ejection fraction 64 (range 35-78) %...
April 16, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29660764/prognostic-utility-of-meld-xi-in-adult-congenital-heart-disease-patients-undergoing-cardiac-transplantation
#16
Evan D Adams, Nicholas J Jackson, Tim Young, Eugene C DePasquale, Leigh C Reardon
BACKGROUND: MELD-XI (Model for End-Stage Liver Disease eXcluding INR) at cardiac transplant has demonstrated prognostic survival utility, but has not been specifically validated in adult congenital heart disease (ACHD) in a registry study. METHODS: Adults undergoing first time orthotopic heart transplant from 2005-2015 in the UNOS (United Network for Organ Sharing) registry were examined in parallel: ACHD (n=543), ischemic dilated cardiomyopathy (IDCM, n=6,954) and valvular heart disease (VHD, n=355)...
April 16, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29660142/use-of-digoxin-in-atrial-fibrillation-one-step-further-in-the-mortality-controversy-from-the-affirm-study
#17
Richard Charnigo, Paul Khairy, Jing Guo, Azadeh Shohoudi, Claude S Elayi
BACKGROUND: Whether there is a causal association between digoxin and mortality among patients with atrial fibrillation (AF), with or without congestive heart failure (HF), has been controversial; in particular, two prior analyses of data from the Atrial Fibrillation Follow-up Investigation of Rhythm Management (AFFIRM) trial have yielded conflicting results. We sought to investigate how digoxin impacts mortality, in the full AFFIRM cohort and for various subgroups, by applying marginal structural modeling (MSM) to AFFIRM data...
April 16, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29659090/detection-of-intra-cardiac-thrombi-and-congestive-heart-failure-in-cats-using-computed-tomographic-angiography
#18
Kyle P Vititoe, Ryan C Fries, Stephen Joslyn, Laura E Selmic, Mark Howes, Jordan P Vitt, Robert T O'Brien
Arterial thromboembolism is a life-threatening condition in cats most commonly secondary to cardiac disease. Echocardiography is the reference standard to evaluate for presence of a thrombus. In humans, computed tomographic (CT) angiography is becoming widely used to detect left atrial thrombi precluding the use of sedation. The purpose of this prospective, controlled, methods comparison pilot study was threefold: (1) describe new CT angiography protocol used in awake cats with cardiac disease and congestive heart failure; (2) determine accuracy of continuous and dynamic acquisition CT angiography to identify and characterize cardiac thrombi from spontaneous echocardiographic contrast using transthoracic echocardiography as our reference standard; (3) identify known negative prognostic factors and comorbidities of the thorax that CT angiography may provide that complement or supersede echocardiographic examination...
April 16, 2018: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/29659026/%C3%AE-1-subunit-stabilises-sodium-channel-nav1-7-against-mechanical-stress
#19
Jannis Körner, Jannis Meents, Jan-Philipp Machtens, Angelika Lampert
Voltage-gated sodium channels are key players in neuronal excitability and pain signalling. Precise gating of these channels is crucial as small alterations can already lead to pathologic phenotypes like pain or heart failure. Mechanical stress has been shown to affect sodium channel activation and inactivation. This suggests that stabilising components are necessary to ensure precise channel gating in living organisms. Here, we show that mechanical shear stress affects voltage dependence of activation and fast inactivation of the Nav1...
April 16, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29658864/right-ventricular-perforation-by-a-defibrillator-lead-migrating-to-the-left-breast
#20
Jerneja Tasic, Rok Zbacnik, Igor Zupan, Jus Ksela
Cardiac perforation after an ICD implantation is a rare complication, with a reported incidence between 0.6-5.2%. Its manifestation might be acute, subacute, or delayed, with an acute perforation occurring within the first 24 hours after implantation, frequently accompanied by severe clinical signs, while subacute and delayed perforations have a more benign progression. Here, we report a case of a 69-year old patient with an acute right ventricular perforation by a defibrillator lead migrating all the way through the pericardium and thoracic wall into the left breast, with an unusually mild and benign clinical course, delaying prompt diagnosis and postponing subsequent surgical treatment...
March 5, 2018: Heart Surgery Forum
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