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ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs

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https://www.readbyqxmd.com/read/28328556/chronological-changes-and-correlates-of-loop-diuretic-dose-in-left-ventricular-assist-device-patients
#1
Kazuhiko Kido, Bennet George, Richard J Charnigo, Tracy E Macaulay, Sara D Brouse, Maya Guglin
No study has systematically evaluated the prevalence and dosages of diuretic use for patients after left ventricular assist device (LVAD) implantation. The primary objective was to characterize chronological change in prevalence and doses of loop diuretics after LVAD placement. The secondary objective was to identify correlates of actual doses of loop diuretics. We retrospectively reviewed medical records of adult patients with LVAD implantation at the University of Kentucky. Prevalence of diuretic use and furosemide equivalent dose were assessed before LVAD implantation and at seven time points thereafter: 1 week, 1 month, 3 months, 6 months, 1 year, 18 months, and 2 years...
March 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28328555/association-of-pediatric-cardiac-surgical-volume-and-mortality-after-cardiac-ecmo
#2
Cindy S Barrett, Titus T Chan, Jacob Wilkes, Susan L Bratton, Ravi R Thiagarajan
Centers with higher surgical and ECMO volume have improved survival for children undergoing pediatric cardiac surgery and ECMO respectively. We examined the relationship between both cardiac surgical and cardiac ECMO volumes, with survival. Using data from the Pediatric Health Information System, we reviewed patients who underwent ECMO during the hospitalization for cardiac surgery or heart transplantation from January 2003- June 2014. Among 106,967 patients in 43 centers undergoing a Risk Adjustment for Congenital Heart Surgery-1 (RACHS) 1-6 procedure (n =104,951) and/or cardiac transplantation (n=2016), 2...
March 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28328554/the-effect-of-inlet-cannula-length-on-the-intraventricular-flow-field-an-in-vitro-flow-visualization-study-using-the-evaheart-lvad
#3
Karen May-Newman, Juyeun Moon, Varsha Ramesh, Ricardo Montes, Josue Campos, Brian Herold, Paul Isingoma, Tadashi Motomura, Robert Benkowski
LVAD inflow cannula malposition is a significant risk for pump thrombosis. Thrombus development is influenced by altered flow dynamics, such as stasis or high shear that promote coagulation. The goal of this study was to measure the intraventricular flow field surrounding the apical inflow cannula of the Evaheart centrifugal LVAD, and assess flow stasis, vortex structures and pulsatility for a range of cannula insertion depths and support conditions. Experimental studies were performed using a mock loop with a customized silicone left ventricle (LV) and the Evaheart LVAD...
March 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319524/combined-therapy-of-ventricular-assist-device-and-extracorporeal-membrane-oxygenation-for-profound-acute-cardiopulmonary-failure
#4
Kevin Fujita, Koji Takeda, Boyganzi Li, Christine Mauro, Paul Kurlansky, Sowmyashree Sreekanth, Jiho Han, Lauren K Truby, Reshad Garan, Veli Topkara, Melana Yuzefpolskaya, Paolo Colombo, Yoshifumi Naka, Hiroo Takayama
Short-term ventricular assist devices (ST-VAD) have been effective in treating patients with refractory cardiogenic shock. Membrane oxygenators (MO) can be added to the circuit for concomitant profound refractory hypoxia. This study reports outcomes of combined therapy in this portion of patients. This is a retrospective review of 166 patients who received an ST-biventricular assist device (BiVAD) or right ventricular assist device (RVAD) for cardiogenic shock between November 2007 and November 2014. An MO was added to the RVAD for profound hypoxia refractory to maximized ventilation...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319523/plasma-levels-of-microrna-155-are-upregulated-with-long-term-left-ventricular-assist-device-support
#5
Teresa Wang, Emily C OʼBrien, Joseph G Rogers, Daniel L Jacoby, Michael E Chen, Jeffrey M Testani, Dawn E Bowles, Carmelo A Milano, G Michael Felker, Chetan B Patel, Pramod N Bonde, Tariq Ahmad
Left ventricular assist device (LVAD) therapy unloads the failing heart but exposes the human body to unique pathophysiological demands such as continuous blood-flow and complete univentricular support, which are associated with increased risk of adverse clinical outcomes. MiRNAs are 22-23 nucleotide RNAs involved in regulation of multiple biological processes including the pathogenesis of heart failure (HF). Thus, measurement of miRNAs may have potential in both diagnostics as circulating biomarkers, and in therapeutics for targeted interventions...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319522/a-numerical-simulation-comparing-a-cavopulmonary-assist-device-and-va-ecmo-for-failing-fontan-support
#6
Po-Lin Hsu, Dongfang Wang, Cherry Ballard-Croft, Dawei Xiao, Joseph B Zwischenberger
A cavopulmonary assist device (CPAD) has been developed for failing Fontan support. This CPAD pumps blood from superior/inferior vena cavae to pulmonary artery. In this study, we compared failing Fontan support with CPAD versus VA ECMO in silico. A numerical lumped-parameter circulatory system model was used to simulate Fontan circulation. Failing Fontan was simulated by increased pulmonary resistance. Central venous pressure (CVP), mean pulmonary arterial pressure (mPAP), left atrial pressure (LAP), and univentricular outflow (CO) were simulated and compared to published clinical data...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319521/warfarin-and-aspirin-versus-warfarin-alone-for-prevention-of-embolic-events-in-patients-with-a-heartmate-ii%C3%A2-left-ventricular-assist-device
#7
Joseph S Van Tuyl, Ian B Hollis, Khalid A Alburikan, Richard Tran, Brian P Murray, Jo E Rodgers, Jason N Katz, Brett C Sheridan
Acquired von Willebrand disease increases bleeding risk in patients implanted with a continuous-flow left ventricular assist device. Lower aspirin doses decrease the risk of bleeding without an increased risk of embolic events. No published studies in the U.S. have compared the incidence of bleeding and thrombotic events between antithrombotic regimens with and without aspirin. A single-center, retrospective analysis was conducted of adult patients implanted with a HM II. Patients received warfarin and aspirin 81 mg daily or warfarin alone...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28319520/infections-in-patients-with-a-total-artificial-heart-are-common-but-rarely-fatal
#8
Luis F Hidalgo, Keyur B Shah, Richard H Cooke, Daniel G Tang, Vigneshwar Kasirajan, Howard A Cooper, Wilbert S Aronow
Patients who received a total artificial heart (TAH) at Virginia Commonwealth University (VCU) between January 1, 2010 and December 31, 2011 were identified from the VCU Mechanical Circulatory Support Clinical Database. Retrospective data extraction from the medical records was performed from the time of TAH implantation until heart transplantation or death. Infections were classified as confirmed or suspected. Twenty-seven men and 5 women, mean age 49.5 years (range 24 to 68 years) received a TAH. The mean duration of TAH support was 225 days (range 1 to 1334 days)...
March 17, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28323665/desmopressin-use-in-refractory-gastrointestinal-bleeding-in-lvad-patient
#9
Grigoriy E Gurvits
No abstract text is available yet for this article.
March 16, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28323664/reply-to-gurvits-regarding-desmopressin-use-in-refractory-gastrointestinal-bleeding-in-lvad-patient
#10
Ian B Hollis, Sheh-Li Chen, Patricia P Chang, Jason N Katz
No abstract text is available yet for this article.
March 16, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28323663/percutaneous-single-site-cannulation-for-acute-right-sided-support
#11
Mahim Malik, Ahmet Kilic, Bryan A Whitson
Right ventricular failure (RVF) is a challenging problem after left ventricular device implantation, leading to considerable morbidity and mortality. When inotropic support is no longer adequate, a temporary right ventricular assist device is needed which often mandates reopening of the sternotomy for implant and explant. We describe our technique to percutaneously place a right-internal jugular cannula for extra-corporeal support.
March 16, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28323662/hvad-flow-waveform-morphologies-theoretical-foundation-and-implications-for-clinical-practice
#12
Jonathan D Rich, Daniel Burkhoff
Continuous flow ventricular assist device (cfVAD) performance and patient hemodynamic conditions are intimately interrelated and dynamic, changing frequently with alterations in physiologic conditions, particularly pre- and after-loading conditions. The Heartware cfVAD (HVAD) provides a unique feature among currently approved VADs of providing an estimated instantaneous flow waveform, the characteristics of which can provide significant insights into patient and device properties. Despite being readily available, HVAD waveforms are poorly understood, underutilized and insufficiently leveraged, even by clinicians who regularly manage HVAD patients...
March 16, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28257296/extracorporeal-circulation-during-lung-transplantation-procedures-a-meta-analysis
#13
Dominik J Hoechter, Yu-Ming Shen, Tobias Kammerer, Sabina Günther, Thomas Weig, René Schramm, Christian Hagl, Frank Born, Bruno Meiser, Gerhard Preissler, Hauke Winter, Stephan Czerner, Bernhard Zwissler, Mansmann Ulrich, Vera von Dossow
Extracorporeal circulation is an invaluable tool in lung transplantation. Over the past years, an increasing number of centers changed their standard for intraoperative extracorporeal circulation from cardiopulmonary bypass to extracorporeal membrane oxygenation - with differing results. This meta-analysis reviews the existing evidence.An online literature research on Medline, Embase, and Pubmed has been performed. Two persons independently judged the papers using the ACROBAT-NRSI tool of the Cochrane collaboration...
February 27, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28234644/in-vivo-evaluation-of-physiological-control-algorithms-for-lvads-based-on-left-ventricular-volume-or-pressure
#14
Gregor Ochsner, Markus J Wilhelm, Raffael Amacher, Anastasios Petrou, Nikola Cesarovic, Silvan Staufert, Barbara Röhrnbauer, Francesco Maisano, Christofer Hierold, Mirko Meboldt, Marianne Schmid Daners
Turbodynamic left ventricular assist devices (LVADs) provide a continuous flow depending on the speed at which the pump is set, and do not adapt to the changing requirements of the patient. The limited adaptation of the pump flow to the amount of venous return can lead to ventricular suction or overload. Physiological control may compensate such situations by an automatic adaptation of the pump flow to the volume status of the left ventricle. We evaluated two physiological control algorithms in an acute study with eight healthy pigs...
February 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28234643/18f-fdg-pet-ct-in-the-diagnosis-and-management-of-continuous-flow-left-ventricular-assist-device-infections-a-case-series-and-review-of-the-literature
#15
Sakir Akin, Rahat Muslem, Alina A Constantinescu, Olivier C Manintveld, Ozcan Birim, Jasper J Brugts, Alexander P W M Maat, Alida C Fröberg, Ad J J C Bogers, Kadir Caliskan
Implantable continuous flow left ventricular assist devices (LVAD's) are increasingly used in end-stage heart failure treatment as a bridge-to-transplant and destination therapy. However, LVAD's still have major drawbacks, such as infections that can cause morbidity and mortality. Unfortunately, appropriate diagnosis of LVAD-related and LVAD-specific infections can be very cumbersome. The differentiation between deep and superficial infections, is crucial in clinical decision-making. Despite a decade of experience in using fluorodeoxyglucose positron emission tomography/computed tomography (F-FDG PET/CT) to diagnose various infections, its use in LVAD patients remains scarce...
February 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28234642/osteogenic-differentiation-of-mscs-on-fibronectin-coated-and-nha-modified-scaffolds
#16
Farzaneh Mohamadyar-Toupkanlou, Ebrahim Vasheghani-Farahani, Hana Hanaee-Ahvaz, Masoud Soleimani, Masumeh Dodel, Parvaneh Havasi, Abdolreza Ardeshirylajimi, Elham Sadat Taherzadeh
The increasing demand for biocompatible bone substitutes has made it a priority to tissue engineering and regenerative medicine scientists. Combination of minerals, growth factors and extracellular matrix (ECM) proteins with nanofibrous scaffolds is a potential promising strategy for bone reconstruction and clinical applications. In this study, nanohydroxyapatite (nHA) was incorporated in electrospun nanofibrous polycaprolactone (PCL) scaffolds coated with fibronectin (Fn). The potential bone regeneration capacities of these scaffolds were evaluated in vitro and in vivo using mouse mesenchymal stem cells (mMSCs)...
February 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28234641/a-leukocyte-filter-does-not-provide-further-benefit-during-ex-vivo-lung-perfusion
#17
Jessica G Y Luc, Nader S Aboelnazar, Sayed Himmat, Sanaz Hatami, Alois Haromy, Nobutoshi Matsumura, Vishnu Vasanthan, Christopher W White, Michael Mengel, Darren H Freed, Jayan Nagendran
Normothermic ex vivo lung perfusion (EVLP) allows for assessment and reconditioning of donor lungs. Though a leukocyte filter (LF) is routinely incorporated into the EVLP circuit, its efficacy remains to be determined. Twelve pig lungs were perfused and ventilated ex vivo in a normothermic state for 12 hours. Lungs (n=3) were allocated to 4 groups according to perfusate composition and the presence or absence of a LF in the circuit (acellular ± LF, cellular ± LF). Acceptable physiologic lung parameters were achieved during EVLP; however, increased amounts of pro-inflammatory cytokines (TNF-α, IL-6) and leukocytes in the perfusate were observed despite the presence or absence of a LF...
February 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28198716/incidence-of-cannula-associated-deep-vein-thrombosis-after-veno-venous-ecmo
#18
Jay Menaker, Ali Tabatabai, Raymond Rector, Katelyn Dolly, Joseph Kufera, Eugenia Lee, Zachary Kon, Pablo Sanchez, Si Pham, Daniel L Herr, Michael Mazzeffi, Ronald P Rabinowitz, James V OʼConnor, Deborah M Stein, Thomas M Scalea
Limited literature regarding the incidence of cannula associated deep vein thrombosis (CaDVT) following veno-venous extracorporeal membrane oxygenation (VV ECMO) exists. The purpose of this study was to identify the incidence of post decannulation CaDVT and identify any associated risk factors. Forty eight patients were admitted between August 2014 and January 2016 to the Lung Rescue Unit were included in the study. Protocolized anticoagulation levels (partial thromboplastin time 45-55 second) and routine post decannulation DVT screening were in place during the study period...
February 13, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28195885/eisenmenger-syndrome-and-pregnancy-novel-ecmo-configuration-as-a-bridge-to-delivery-and-recovery-utilizing-a-multidisciplinary-team
#19
Erika B Rosenzweig, Darryl Abrams, Mauer Biscotti, Diane Kerstein, Daphnie Drassinower, Daniel Brodie, Matthew Bacchetta
Pregnancy is typically contraindicated in Eisenmenger syndrome because of its association with excessively high maternal and fetal morbidity and mortality. We report on our novel approach to successfully managing a 29 year-old pregnant woman with an unrepaired patent ductus arteriosus (PDA) with Eisenmenger syndrome through delivery and recovery. Venovenous ECMO was utilized during induction of labor to stabilize maternal hemodynamics and optimize fetal oxygenation by creating an oxygenated right-to-left shunt through the PDA...
February 9, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28195884/interventional-treatment-of-lvad-outflow-graft-stenosis-by-introduction-of-bare-metal-stents
#20
Dominik Wiedemann, Thomas Schlöglhofer, Thomas Haberl, Julia Riebandt, Kamen Dimitrov, Heinrich Schima, Johannes Kastner, Wolfgang Matzek, Günther Laufer, Daniel Zimpfer
LVAD outflow graft stenosis is a rare but life-threatening complication of MCS-therapy. Current treatment modalities (pump exchange or systemic thrombolytic therapy) are associated with significant mortality and morbidity.Implantation of bare metal stents within the stenosed outflow graft is an alternative. Herein we describe a series of 3-cases with successful stent placement. This seems to be safe and successful however correct and early diagnosis of outflow stenosis can be challenging. Information provided by the HeartWare HVAD logfiles are extremely helpful for diagnosis...
February 9, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
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