keyword
MENU ▼
Read by QxMD icon Read
search

HeartMate II

keyword
https://www.readbyqxmd.com/read/28643335/a-review-of-hemolysis-prediction-models-for-computational-fluid-dynamics
#1
REVIEW
Hai Yu, Sebastian Engel, Gábor Janiga, Dominique Thévenin
Flow-induced hemolysis is a crucial issue for many biomedical applications; in particular, it is an essential issue for the development of blood-transporting devices such as left ventricular assist devices, and other types of blood pumps. In order to estimate red blood cell (RBC) damage in blood flows, many models have been proposed in the past. Most models have been validated by their respective authors. However, the accuracy and the validity range of these models remains unclear. In this work, the most established hemolysis models compatible with computational fluid dynamics of full-scale devices are described and assessed by comparing two selected reference experiments: a simple rheometric flow and a more complex hemodialytic flow through a needle...
June 23, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28621882/exercise-capacity-and-functional-performance-in-heart-failure-patients-supported-by-a-left-ventricular-assist-device-at-discharge-from-inpatient-rehabilitation
#2
Thomas Schmidt, Birna Bjarnason-Wehrens, Petra Bartsch, Ezin Deniz, Jan Schmitto, Sebastian Schulte-Eistrup, Detlev Willemsen, Nils Reiss
Adequate physical and functional performance is an important prerequisite for renewed participation and integration in self-determined private and (where appropriate) professional lives following left ventricular assist device (LVAD) implantation. During cardiac rehabilitation (CR), individually adapted exercise programs aim to increase exercise capacity and functional performance. A retrospective analysis of cardiopulmonary exercise capacity and functional performance in LVAD patients at discharge from a cardiac rehabilitation program was conducted...
June 16, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28621461/the-use-of-eptifibatide-alone-or-in-combination-with-heparin-or-argatroban-for-suspected-thrombosis-in-patients-with-left-ventricular-assist-devices
#3
Abbas Bitar, Rajakrishnan Vijayakrishnan, Andrew Lenneman, Emma Birks, Todd Massey, Mark Slaughter, Dmitry Abramov
Pump thrombosis and hemolysis in patients with left ventricular assist devices (LVADs) are associated with significant morbidity and mortality. Intensification of anticoagulation has been suggested as potential therapy, with mixed results. The aim of this study is to assess the safety and efficacy of adding eptifibatide with or without an anticoagulation agent in managing patients with LVAD presenting with hemolysis and suspected pump thrombosis. This retrospective single center study included all patients who presented with their first episode of suspected pump thrombosis and were treated with eptifibatide with or without an anticoagulant between March 1, 2011 and July 30, 2015...
June 16, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28601303/device-specific-evaluation-of-intraventricular-left-ventricular-assist-device-position-by-quantitative-coaxiality-analysis
#4
Amedeo Anselmi, Sophie Collin, Pascal Haigron, Jean-Philippe Verhoye, Erwan Flecher
BACKGROUND: Patient-specific anatomy may influence the final intraventricular positioning of inflow cannula in left ventricular assist device (LVAD) recipients. An association exists between such positioning and clinical outcomes (specifically, orientation toward the interventricular septum has negative prognostic implications). Alternative commercially available LVADs are characterized by markedly different design, with potential consequences on intrathoracic fitting among individual patients...
June 1, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28562236/left-ventricular-assist-device-exchange-the-toronto-general-hospital-experience
#5
Hideki Tsubota, Roberto V P Ribeiro, Filio Billia, Robert J Cusimano, Terrence M Yau, Mitesh V Badiwala, William E Stansfield, Vivek Rao
BACKGROUND: As support times for left ventricular assist devices (LVADs) become longer, several complications requiring device exchange may occur. To our knowledge, this is the first Canadian report regarding implantable LVAD exchange. METHODS: We retrospectively reviewed the cases of consecutive, unique patients implanted with an LVAD between June 2006 and October 2015 at Toronto General Hospital. RESULTS: In total, 122 patients were impanted with an LVAD during the study period...
June 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
https://www.readbyqxmd.com/read/28488003/daily-transient-discontinuation-of-extracorporeal-lvad-to-prevent-thromboembolism-of-mechanical-aortic-valve-prosthesis
#6
Takamichi Inoue, Tadashi Kitamura, Shinzo Torii, Mitsuhiro Hirata, Toshiaki Mishima, Koichi Sughimoto, Hirotoki Ohkubo, Kensuke Kobayashi, Mamika Motokawa, Miyuki Shibata, Takuya Matsushiro, Yuta Tsuchida, Yurie Miyata, Minoru Ono, Kagami Miyaji
Patients with mechanical aortic valves are generally contraindicated for left ventricular assist device (LVAD) insertion because the prosthetic valve often becomes fixed in closed position. A 41-year-old woman with mechanical aortic valve prosthesis experienced sudden chest pain and developed cardiogenic shock. A paracorporeal pulsatile LVAD and a monopivot centrifugal pump as a right VAD (RVAD) were implanted. The mechanical aortic valve was intentionally left in place. Soon after the operation, LVAD support was discontinued daily for few seconds to allow the mechanical aortic valve to open and to avoid thrombus formation...
May 9, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28483949/development-of-high-grade-daptomycin-resistance-in-corynebacterium-striatum-while-on-therapy
#7
Saira Ajmal, Omar Abu Saleh, Elena Beam
We report of a 62-year-old male with ischemic cardiomyopathy complicated by cardiogenic shock who underwent placement of a left-ventricular assist device (HeartMate II LVAD) in July 2013 as destination therapy.….
May 8, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28470998/percutaneous-transcatheter-balloon-dilatation-and-stenting-to-the-inflow-cannula-stenosis-of-a-left-ventricular-assist-device
#8
Stephen M Carr, Dieter F Lubbe, Philip R Huber
Left ventricular assist devices (LVAD) improve survival in patients with advanced heart failure but are prone to various complications causing mechanical failure. Inflow cannula stenosis presents a particular challenge often requiring invasive surgical repair. We present a novel transcatheter approach for stent delivery to successfully restore hemodynamic function in a patient with inflow cannula stenosis of a HeartMate II LVAD. © 2017 Wiley Periodicals, Inc.
May 4, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28465311/accuracy-of-seattle-heart-failure-model-and-heartmate-ii-risk-score-in-non-inotrope-dependent-advanced-heart-failure-patients-insights-from-the-roadmap-study-risk-assessment-and-comparative-effectiveness-of-left-ventricular-assist-device-and-medical-management
#9
REVIEW
David E Lanfear, Wayne C Levy, Josef Stehlik, Jerry D Estep, Joseph G Rogers, Keyur B Shah, Andrew J Boyle, Joyce Chuang, David J Farrar, Randall C Starling
BACKGROUND: Timing of left ventricular assist device (LVAD) implantation in advanced heart failure patients not on inotropes is unclear. Relevant prediction models exist (SHFM [Seattle Heart Failure Model] and HMRS [HeartMate II Risk Score]), but use in this group is not established. METHODS AND RESULTS: ROADMAP (Risk Assessment and Comparative Effectiveness of Left Ventricular Assist Device and Medical Management in Ambulatory Heart Failure Patients) is a prospective, multicenter, nonrandomized study of 200 advanced heart failure patients not on inotropes who met indications for LVAD implantation, comparing the effectiveness of HeartMate II support versus optimal medical management...
May 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28461802/nonidentical-continuous-flow-devices-for-biventricular-support
#10
Andrew C W Baldwin, Elena Sandoval, William E Cohn, Hari R Mallidi, Jeffrey A Morgan, O H Frazier
Although biventricular heart failure has been successfully managed with dual continuous-flow ventricular assist devices, the long-term use of 2 mechanically dissimilar pumps has traditionally been discouraged. We present the case of a 52-year-old man whose treatment with a HeartMate II left ventricular assist device was complicated by right ventricular failure, necessitating the implantation of a long-term right ventricular assist device. A HeartWare left ventricular assist device was placed along the right ventricular base to avoid interference with the HeartMate II housing...
April 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28430969/transfemoral-aortic-valve-replacement-prior-to-heartmate-ii-left-ventricular-assist-device-exchange
#11
Shashank Sharma, Vakhtang Tchantchaleishvili, Alexandros Briasoulis, David L Joyce
No abstract text is available yet for this article.
April 18, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28430305/turbulence-measurements-in-an-axial-rotary-blood-pump-with-laser-doppler-velocimetry
#12
Chan Y Schüle, Klaus Affeld, Max Kossatz, Christian O Paschereit, Ulrich Kertzscher
BACKGROUND: The implantation of rotary blood pumps as ventricular assist devices (VADs) has become a viable therapy for quite a number of patients with end-stage heart failure. However, these rotary blood pumps cause adverse events that are related to blood trauma. It is currently believed that turbulence in the pump flow plays a significant role. But turbulence has not been measured to date because there is no optical access to the flow space in rotary blood pumps because of their opaque casings...
April 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28430300/left-ventricular-assist-pump-pocket-infection-conservative-treatment-strategy-for-destination-therapy-candidates
#13
Elie Haddad, François-Xavier Lescure, Walid Ghodhbane, Laurent Lepage, Camille D'humieres, William Vindrios, Yazdan Yazdanpanah, Patrick Nataf, Matthias Kirsch
BACKGROUND: Heart failure is a major cause of mortality and morbidity, particularly among patients with advanced disease and no access to cardiac transplantation. LVAD implantation is not only a bridge-to-transplantation option for patients awaiting a heart donor, but is often used as bridge-to-destination therapy in patients unsuited for transplantation for various reasons. LVAD infection is considered the second-most common cause of death in patients who survive the initial 6 months on LVAD support...
April 20, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28430297/stopping-conventional-showering-decreases-pseudomonas-infections-in-left-ventricular-assist-device-patients
#14
Nana Aburjania, Saadia Sherazi, Vakhtang Tchantchaleishvili, Jeffrey D Alexis, Christine M Hay
BACKGROUND: Left ventricular assist device (LVAD) exit-site infections represent a major challenge in the era of modern LVADs. Infections caused by Pseudomonas are particularly difficult to treat due to limited antibiotic susceptibility. We hypothesized that keeping the LVAD exit site dry while bathing could result in reduced incidence of Pseudomonas infections. METHODS: Starting in April 2013, all patients who underwent placement of HeartMate II (HM II) LVAD were instructed not to take conventional showers and to keep the exit site dry while bathing...
April 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28412431/3d-morphological-changes-in-lv-and-rv-during-lvad-ramp-studies
#15
Karima Addetia, Nir Uriel, Francesco Maffessanti, Gabriel Sayer, Sirtaz Adatya, Gene H Kim, Nitasha Sarswat, Savitri Fedson, Diego Medvedofsky, Eric Kruse, Keith Collins, Daniel Rodgers, Takayoshi Ota, Valluvan Jeevanandam, Victor Mor-Avi, Daniel Burkhoff, Roberto M Lang
OBJECTIVES: The purpose of this study was to investigate the differential impact of the 2 most commonly available left ventricular assist device (LVAD) types on the right (RV) and left (LV) ventricles using 3-dimensional (3D) echocardiography-based analysis of ventricular morphology. BACKGROUND: LVADs have emerged as common therapy for advanced heart failure. Recent data suggest that the heart responds differently to speed settings in the 2 main devices available (HeartMate II [HMII], St Jude Medical, Pleasanton, California, and HVAD, HeartWare International, Framingham, Massachusetts)...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28385948/hemocompatibility-related-outcomes-in-the-momentum-3-trial-at-6-months-a-randomized-controlled-study-of-a-fully-magnetically-levitated-pump-in-advanced-heart-failure
#16
Nir Uriel, Paolo C Colombo, Joseph C Cleveland, James W Long, Christopher Salerno, Daniel J Goldstein, Chetan B Patel, Gregory A Ewald, Antone J Tatooles, Scott C Silvestry, Ranjit John, Christiano Caldeira, Valluvan Jeevanandam, Andrew J Boyle, Kartik S Sundareswaran, Poornima Sood, Mandeep R Mehra
BACKGROUND : The HeartMate 3 (HM3) Left Ventricular Assist System (LVAS) (Abbott) is a centrifugal, fully magnetically levitated, continuous-flow blood pump engineered to enhance hemocompatibility and reduce shear stress on blood components. The MOMENTUM 3 trial (Multicenter Study of MagLev Technology in Patients Undergoing Mechanical Circulatory Support Therapy With HeartMate 3) compares the HM3 LVAS with the HeartMate II (HMII) LVAS (Abbott) in advanced heart failure refractory to medical management, irrespective of therapeutic intention (bridge to transplant versus destination therapy)...
April 6, 2017: Circulation
https://www.readbyqxmd.com/read/28365215/mean-arterial-pressure-to-central-venous-pressure-ratio-a-novel-marker-for-right-ventricular-failure-after-left-ventricular-assist-device-placement
#17
Burhan Mohamedali, Rami Doukky, Kelly Karavalos, Elizabeth Avery, Geetha Bhat
BACKGROUND: Early right ventricular failure (RVF) is common after left ventricular assist device (LVAD) implantation and often leads to increased morbidity and mortality. It is difficult to predict early RVF on the basis of clinical and hemodynamic parameters. We investigated the utility of mean arterial pressure (MAP) to central venous pressure (CVP) ratio in predicting early RVF. METHODS AND RESULTS: We analyzed a retrospective cohort of 212 consecutive patients who underwent hemodynamic assessment before destination-therapy LVAD implantation...
March 29, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28350641/exercise-training-in-a-patient-with-a-left-ventricular-assist-device-and-large-aortic-valve-thrombus
#18
Mijiti Wuliya, Sandrine Peyrot, Costin Radu, Jean-François Deux, Habib Ben Elhaj, Nicolas Lellouche, Thibaud Damy, Soulef Guendouz, Barnabas Gellen
DETAILS OF THE CLINICAL CASE: An aortic valve thrombus (AVT) is a rare complication after HeartMate II implantation. In a 44-year-old man, a large AVT was discovered 6 weeks after implantation of a HeartMate II for severe dilated cardiomyopathy. The aortic valve was permanently closed. DISCUSSION: After a followup of 3 months without embolic events, the patient started a cardiac rehabilitation (CR) program involving aerobic exercise, resistance exercises, group gymnastics, and relaxation exercise, and completed the program without any complications, resulting in a significant functional benefit...
March 24, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28329284/contemporary-outcome-of-unplanned-right-ventricular-assist-device-for-severe-right-heart-failure-after-continuous-flow-left-ventricular-assist-device-insertion
#19
Daisuke Yoshioka, Hiroo Takayama, Reshad A Garan, Veli K Topkara, Jiho Han, Paul Kurlansky, Melana Yuzefpolskaya, Paolo C Colombo, Yoshifumi Naka, Koji Takeda
OBJECTIVES: The timely use of a right ventricular assist device (RVAD) becomes necessary for severe right heart failure (RHF) after left ventricular assist device (LVAD) insertion. This study evaluates outcomes in patients who required unplanned RVAD support early after continuous-flow (CF) LVAD insertion. METHODS: We retrospectively reviewed 305 patients who underwent HeartMate II/HeartWare CF-LVAD insertion between 2009 and 2014. Twenty-seven (9%) patients required unplanned RVAD for severe RHF early after LVAD insertion...
June 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329060/first-series-of-left-ventricular-assist-device-exchanges-to-heartmate-3
#20
Jasmin S Hanke, Sebastian V Rojas, Günes Dogan, Christina Feldmann, Erik Beckmann, Ezin Deniz, Bettina Wiegmann, Jana-Elena Michaelis, L Christian Napp, Dominik Berliner, Malakh Shrestha, Johann Bauersachs, Axel Haverich, Jan D Schmitto
OBJECTIVES: Left ventricular assist device (LVAD) exchange is becoming a standard surgical procedure. The exchange procedure is an opportunity to upgrade patients to a new generation pump that offers advanced reduction of adverse events or longer battery hours. METHODS: We performed an analysis of 6 consecutive patients who underwent LVAD exchange to HeartMate 3 either from a HeartWare or HeartMate (HM) II device. Minimally invasive operations were performed through a lateral thoracotomy...
May 1, 2017: European Journal of Cardio-thoracic Surgery
keyword
keyword
70537
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"