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https://www.readbyqxmd.com/read/28453742/blinded-contractility-analysis-in-hipsc-cardiomyocytes-in-engineered-heart-tissue-format-comparison-with-human-atrial-trabeculae
#1
Ingra Mannhardt, Alexandra Eder, Berengere Dumotier, Maksymilian Prondzynski, Elisabeth Krämer, Martin Traebert, Klaus-Dieter Söhren, Frederik Flenner, Konstantina Stathopoulou, Marc D Lemoine, Lucie Carrier, Torsten Christ, Thomas Eschenhagen, Arne Hansen
Objective: Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM) may serve as a new assay for drug testing in a human context, but their validity particularly for the evaluation of inotropic drug effects remains unclear. In this blinded analysis, we compared the effects of 10 indicator compounds with known inotropic effects in electrically stimulated (1.5 Hz) hiPSC-CM-derived 3 dimensional engineered heart tissue (EHT) and human atrial trabeculae (hAT). Methods and results: Human EHTs were prepared from iCell® hiPSC-CM, hAT obtained at routine heart surgery...
April 27, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28453621/prevalence-of-malignant-arrhythmia-and-sudden-cardiac-death-in-takotsubo-syndrome-and-its-management
#2
Ibrahim El-Battrawy, Siegfried Lang, Uzair Ansari, Erol Tülümen, Katja Schramm, Christian Fastner, Xiaobo Zhou, Ursula Hoffmann, Martin Borggrefe, Ibrahim Akin
Aims: Recent studies have highlighted that takotsubo syndrome (TTS) is associated with a poor clinical outcome. Our study was conducted to determine the short- and long-term prevalence, recurrence rate and impact of life-threatening arrhythmias (LTA) on the clinical outcome of TTS. Methods and results: Our institutional database constituted a collective of 114 patients diagnosed with TTS between 2003 and 2015. The patient groups, divided according to the presence (n = 13, 11...
April 26, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28449477/continuous-administration-of-recombinant-human-b-type-natriuretic-peptide-can-improve-heart-and-renal-function-in-patients-after-cardiopulmonary-bypass-surgery
#3
Shiguan Le, Jian Xiao, Wei Li, Jing Wang, Qing Wang, Wang Xi, Jibin Xu, Zhinong Wang
BACKGROUND: Any cardiac surgery under cardiopulmonary bypass (CPB) will induce ischemia-reperfusion injury and systematic inflammatory response, which may lead to exacerbation. Conventional therapy strategy is to use inotropes, diuretics and vasodilator drugs, yet, the therapeutic effects of which need to be improved. Recombinant human B-type natriuretic peptide (rhBNP) has been shown to be efficacious in the treatment of acute decompensated heart failure and acute myocardial infarction...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449044/vernakalant-does-not-alter-early-repolarization-or-contractility-in-normal-and-electrically-remodelled-atria
#4
Arne van Hunnik, Hussein Nasrallah, Dennis H Lau, Marion Kuiper, Sander Verheule, Ulrich Schotten
Aims: Besides the inhibition of the sodium inward current, vernakalant also inhibits the ultra rapid rectifier (IKur) and transient outward current (Ito). Inhibition of these currents increases contractility in canine atrial myocytes and goat atria. We investigated the effect of vernakalant on early repolarization and contractility in normal and electrically remodelled atria. Methods and results: Goats were implanted a pressure catheter, piezoelectric crystals, and electrodes to obtain atrial contractility and effective refractory period (ERP)...
April 25, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28445858/the-impact-of-minor-blood-transfusion-on-the-outcome-after-coronary-artery-bypass-grafting
#5
Eeva-Maija Kinnunen, Marco Zanobini, Francesco Onorati, Debora Brascia, Giovanni Mariscalco, Ilaria Franzese, Vito G Ruggieri, Karl Bounader, Andrea Perrotti, Francesco Musumeci, Giuseppe Santarpino, Daniele Maselli, Saverio Nardella, Helmut Gulbins, Riccardo Gherli, Antonino S Rubino, Carmelo Mignosa, Marisa De Feo, Giuseppe Gatti, Francesco Santini, Antonio Salsano, Magnus Dalén, Matteo Saccocci, Daniel Reichart, Giuseppe Faggian, Tiziano Gherli, Francesco Nicolini, Fausto Biancari
PURPOSE: To investigate the impact of minor perioperative bleeding requiring transfusion of 1-2 red blood cell (RBC) units on the outcome after coronary artery bypass grafting (CABG). METHODS: Sixteen cardiac surgical centers contributed to the prospective European CABG registry (E-CABG). 1014 patients receiving 1-2 RBC units during or after isolated CABG were compared to 2264 patients not receiving RBCs. RESULTS: In 827 propensity score matched pairs, transfusion of 1-2 RBC units did not affect the risk of in-hospital/30-day death (p=0...
April 19, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28445240/evaluation-of-a-pediatric-early-warning-score-across-different-subspecialty-patients
#6
Nathan P Dean, J B Fenix, Michael Spaeder, Amanda Levin
OBJECTIVE: To evaluate the ability of a Pediatric Early Warning Score to predict deterioration in different subspecialty patient populations. DESIGN: Single center, retrospective cohort study. Patients were classified into five groups: 1) cardiac; 2) hematology/oncology/bone marrow transplant; 3) surgical; 4) neurologic; and 5) general medical. The relationship between the Pediatric Early Warning Score and unplanned ICU transfer requiring initiation of specific ICU therapies (intubation, high-flow nasal cannula, noninvasive ventilation, inotropes, or aggressive fluid hydration within 12 hr of transfer) was evaluated...
April 25, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28444482/synthesis-pharmacological-evaluation-and-molecular-docking-of-pyranopyrazole-linked-1-4-dihydropyridines-as-potent-positive-inotropes
#7
Rakesh Kumar, Neha Yadav, Rodolfo Lavilla, Daniel Blasi, Jordi Quintana, José Manuel Brea, María Isabel Loza, Jordi Mestres, Mamta Bhandari, Ritu Arora, Rita Kakkar, Ashok K Prasad
1,4-Dihydropyridines are well-known calcium channel blockers, but variations in the substituents attached to the ring have resulted in their role reversal making them calcium channel activators in some cases. We describe the microwave-assisted eco-friendly approach for the synthesis of pyranopyrazole-1,4-dihydropyridines, a new class of 1,4-DHPs, under solvent-free conditions in good yield, and screen them for various in silico, in vitro and in vivo activities. The in vivo experimentation results show that the compounds possess positive inotropic effect, and the docking results validate their good binding with calcium channels...
April 25, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28444178/shortening-cardioplegic-arrest-time-in-patients-undergoing-combined-coronary-and-valve-surgery-results-from-a-multicentre-randomized-controlled-trial-the-scat-trial
#8
Chris A Rogers, Radek Capoun, Lauren J Scott, Jodi Taylor, Anil Jain, Gianni D Angelini, Pradeep Narayan, M-Saadeh Suleiman, Kunal Sarkar, Raimondo Ascione
OBJECTIVES: Combined coronary artery bypass grafting and valve surgery requires a prolonged period of cardioplegic arrest (CA) predisposing to myocardial injury and postoperative cardiac-specific complications. The aim of this trial was to reduce the CA time in patients undergoing combined coronary artery bypass grafting and valve surgery and assess if this was associated with less myocardial injury and related complications. METHODS: Participants were randomized to (i) coronary artery bypass grafting performed on the beating heart with cardiopulmonary bypass support followed by CA for the valve procedure (hybrid) or (ii) both procedures under CA (conventional)...
April 24, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28438820/use-of-an-argatroban-based-purge-solution-in-a-percutaneous-ventricular-assist-device
#9
Benjamin Laliberte, Brent N Reed
PURPOSE: The use of an argatroban-based percutaneous ventricular assist device (pVAD) purge solution in a patient with suspected heparin-induced thrombocytopenia (HIT) is described. SUMMARY: A 70-year-old woman in cardiogenic shock was admitted to a coronary care unit after being discovered unresponsive at home. A transthoracic echocardiogram revealed a low ejection fraction and findings consistent with takotsubo cardiomyopathy. Administration of multiple inotropes and vasopressors was initially required for hemodynamic support...
May 1, 2017: American Journal of Health-system Pharmacy: AJHP
https://www.readbyqxmd.com/read/28437860/chronic-inhibition-of-fatty-acid-amide-hydrolase-by-urb597-produces-differential-effects-on-cardiac-performance-in-normotensive-and-hypertensive-rats
#10
Anna Pedzinska-Betiuk, Jolanta Weresa, Marek Toczek, Marta Baranowska-Kuczko, Irena Kasacka, Ewa Harasim-Symbor, Barbara Malinowska
BACKGROUND AND PURPOSE: Fatty acid amide hydrolase (FAAH) inhibitors are postulated to possess anti-hypertensive potential, because their acute injection decreases blood pressure (BP) in spontaneously hypertensive rats (SHR) partially through normalization of cardiac contractile function. Here, we examined whether the potential hypotensive effect of chronic FAAH inhibition by URB597 in hypertensive rats correlates with changes in cardiac performance. EXPERIMENTAL APPROACH: Experiments were performed using perfused hearts and left atria isolated from 8-10 week old SHR, age-matched deoxycorticosterone acetate (DOCA-salt) rats and normotensive controls chronically treated with URB597 (1 mg kg(-1) ) or vehicle...
April 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28437372/heart-rate-modification-of-cardiac-output-following-cardiac-surgery-the-importance-of-cardiac-time-intervals
#11
Guido Tavazzi, Andy Kontogeorgis, Fabio Guarracino, Niels Bergsland, Ana Martinez-Naharro, John Pepper, Susanna Price
OBJECTIVES: Inadequate cardiac output is associated with a poor outcome following cardiac surgery and is generally modified by the use of positive inotropic agents, volume resuscitation, and pacing. Echocardiography-guided pacemaker optimization is used in the outpatient setting, using different variables including total isovolumic time and the Tei index. We sought to determine the acute impact of heart rate on cardiac electromechanics, cardiac output, and stroke volume in the perioperative setting...
April 21, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28435092/-terpinen-4-ol-changes-intracellular-ca-2-handling-and-induces-pacing-disturbance-in-rat-hearts
#12
Antonio Nei Santana Gondim, Aline Lara, Artur Santos-Miranda, Danilo Roman-Campos, Sandra Lauton-Santos, José Evaldo Rodrigues Menezes-Filho, Carla Maria Lins de Vasconcelos, Eduardo Antonio Conde-Garcia, Silvia Guatimosim, Jader S Cruz
(-)-Terpinen-4-ol is a naturally occurring plant monoterpene and has been shown to have a plethora of biological activities. The objective of this study was to investigate the effects of (-)-terpinen-4-ol on the rat heart, a key player in the control and maintenance of arterial blood pressure. The effects of (-)-terpinen-4-ol on the rat heart were investigated using isolated left atrium isometric force measurements, in vivo electrocardiogram (ECG) recordings, patch clamp technique, and confocal microscopy. It was observed that (-)-terpinen-4-ol reduced contraction force in an isolated left atrium at millimolar concentrations...
April 20, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28434547/stress-dose-corticosteroid-versus-placebo-in-neonatal-cardiac-operations-a-randomized-controlled-trial
#13
Pertti K Suominen, Juho Keski-Nisula, Tiina Ojala, Paula Rautiainen, Timo Jahnukainen, Johanna Hästbacka, Pertti J Neuvonen, Olli Pitkänen, Jussi Niemelä, Anu Kaskinen, Jukka Salminen, Risto Lapatto
BACKGROUND: Corticosteroids can improve the hemodynamic status of neonates with postoperative low cardiac output syndrome after cardiac operations. This study compared a prophylactically administered stress-dose corticosteroid (SDC) regimen against placebo on inflammation, adrenocortical function, and hemodynamic outcome. METHODS: Forty neonates undergoing elective open heart operations were randomized into two groups. The SDC group received perioperatively 2 mg/kg methylprednisolone, and 6 hours after the operation, a hydrocortisone infusion (0...
April 20, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28433581/therapeutic-burst-suppression-coma-in-pediatric-febrile-refractory-status-epilepticus
#14
Jainn-Jim Lin, Cheng-Che Chou, Shih-Yun Lan, Hsiang-Ju Hsiao, Yu Wang, Oi-Wa Chan, Shao-Hsuan Hsia, Huei-Shyong Wang, Kuang-Lin Lin
BACKGROUND: Evidence for the beneficial effect of therapeutic burst-suppression coma in pediatric patients with febrile refractory status epilepticus is limited, and the clinical outcomes of this treatment strategy are largely unknown. Therefore, the aim of this study was to explore the outcomes of therapeutic burst-suppression coma in a series of children with febrile refractory status epilepticus. METHODS: We retrospectively reviewed consecutive pediatric patients with febrile refractory status epilepticus admitted to our pediatric intensive care unit between January 2000 and December 2013...
April 19, 2017: Brain & Development
https://www.readbyqxmd.com/read/28432103/morphology-and-cardiac-physiology-are-differentially-affected-by-temperature-in-developing-larvae-of-the-marine-fish-mahi-mahi-coryphaena-hippurus
#15
Prescilla Perrichon, Christina Pasparakis, Edward M Mager, John D Stieglitz, Daniel D Benetti, Martin Grosell, Warren W Burggren
Cardiovascular performance is altered by temperature in larval fishes, but how acute vs. chronic temperature exposures independently affect cardiac morphology and physiology in the growing larva is poorly understood. Consequently, the influence of water temperature on cardiac plasticity was investigated in developing mahi-mahi. Morphological (e.g. standard length, heart angle) and physiological cardiac variables (e.g. heart rate fH, stroke volume, cardiac output) were recorded under two conditions by imaging: i) under acute temperature exposure where embryos were reared at 25°C up to 128 hours post-fertilization (hpf) and then acutely exposed to 25° (rearing temperature), 27° and 30°C; ii) at two rearing (chronic) temperatures of 26° and 30°C and performed at 32 and 56 hpf...
April 21, 2017: Biology Open
https://www.readbyqxmd.com/read/28430759/evaluation-of-guidelines-for-injured-children-at-high-risk-for-venous-thromboembolism-a-prospective-observational-study
#16
Rachel M Landisch, Sheila J Hanson, Laura D Cassidy, Kristin Braun, Rowena C Punzalan, David M Gourlay
BACKGROUND: Pharmacologic prophylaxis for venous thromboembolism (VTE) is a widely accepted practice in adult trauma patients to prevent associated morbidity and mortality. However, VTE prophylaxis has not been standardized in injured pediatric patients. Our institution identified factors potentially associated with a high risk of VTE in critically injured children that led to prospective implementation of VTE prophylaxis guidelines. We hypothesize that the guidelines are accurate in predicting children at risk for VTE...
May 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28428483/a-retrospective-study-of-anesthesia-for-subcutaneous-ureteral-bypass-placement-in-cats-27-cases
#17
Geneviève C Luca, Beatriz P Monteiro, Marilyn Dunn, Paulo Vm Steagall
The goals of this retrospective clinical case series study were to describe the management of anesthesia, and to report perioperative complications in cats undergoing subcutaneous ureteral bypass (SUB) placement due to ureteral obstruction. Medical records of client-owned cats with ureteral obstruction and anesthetized for SUB placement between 2012 and 2015 in a veterinary teaching hospital were reviewed. Twenty-seven cases were identified. Duration of anesthesia and surgery (mean ± standard deviation) were 215 ± 42 min and 148 ± 36 min, respectively...
April 20, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28428252/low-frequency-blood-pressure-oscillations-and-inotrope-treatment-failure-in-premature-infants
#18
Zachary Andrew Vesoulis, Jessica Hao, Christopher McPherson, Nathalie El Ters, Amit M Mathur
BACKGROUND: The underlying mechanism as to why some hypotensive preterm infants do not respond to inotropic medications remains unclear. For these infants, we hypothesize that impaired vasomotor function is a significant factor and is manifested through a decrease in low-frequency blood pressure variability across regulatory components of vascular tone. METHODS: Infants born 28 weeks estimated gestational age underwent prospective recording of mean arterial blood pressure (MABP) for 72h after birth...
April 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28427403/preoperative-carbohydrate-load-and-intraoperatively-infused-omega-3-polyunsaturated-fatty-acids-positively-impact-nosocomial-morbidity-after-coronary-artery-bypass-grafting-a-double-blind-controlled-randomized-trial
#19
Gibran Roder Feguri, Paulo Ruiz Lúcio de Lima, Danilo de Cerqueira Borges, Laura Ramos Toledo, Larissa Nadaf Batista, Thaís Carvalho E Silva, Neuber José Segri, José Eduardo de Aguilar-Nascimento
BACKGROUND: A strategy of limited preoperative fasting, with carbohydrate (CHO) loading and intraoperative infusion of omega-3 polyunsaturated fatty acids (ω-3 PUFA), has seldom been tried in cardiovascular surgery. Brief fasting, followed by CHO intake 2 h before anesthesia, may improve recovery from CABG procedures and lower perioperative vasoactive drug requirements. Infusion of ω-3 PUFA may reduce occurrences of postoperative atrial fibrillation (POAF) and shorten hospital stays...
April 20, 2017: Nutrition Journal
https://www.readbyqxmd.com/read/28409751/early-extubation-failure-in-very-low-birth-weight-infants-clinical-outcomes-and-predictive-factors
#20
K Al-Hathlol, N Bin Saleem, M Khawaji, S Al Saif, I Abdelhakim, B Al-Hathlol, E Bazbouz, Q Al Anzi, A Al-Essa
OBJECTIVE: To identify the clinical outcomes and the potential predictive factors of early extubation failure (EEF) in very low birth weight (VLBW) infants. METHODS: A retrospective study of VLBW infants admitted to the neonatal intensive care unit (NICU) over fifteen years. Neonates were intubated and mechanically ventilated on the first day of life, and early extubated within the first 3 days. EEF was defined as the need for re-intubation within 3 days of the first extubation...
2017: Journal of Neonatal-perinatal Medicine
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