keyword
MENU ▼
Read by QxMD icon Read
search

HeartWare

keyword
https://www.readbyqxmd.com/read/29436010/changes-in-total-cardiac-output-and-oxygen-extraction-during-exercise-in-patients-supported-with-an-hvad-left-ventricular-assist-device
#1
Thomas Schmidt, Birna Bjarnason-Wehrens, Stephanie Mommertz, Meike Hannig, Sebastian Schulte-Eistrup, Detlev Willemsen, Nils Reiss
Following implantation of a left ventricular assist device (LVAD), acceptable functional performance is now being achieved; however, peak VO 2 and peak work load (watts) remain considerably limited. Maximum physical capacity is essentially dependent on generated cardiac output (CO) and arteriovenous oxygen difference (avDO 2 ). We investigated the changes in CO and avDO 2 during exercise in LVAD patients with an HVAD pump (HeartWare Inc., Framingham, MA, USA). Approximately 6 weeks after implantation, 20 patients (100% male, 60...
February 12, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29436002/peripheral-artery-disease-and-continuous-flow-left-ventricle-assist-device-an-engaging-complement-analysis-may-help-to-guide-treatment
#2
Calogero Falletta, Salvatore Pasta, Giuseppe Maria Raffa, Francesca Crinò, Sergio Sciacca, Francesco Clemenza
Use of continuous flow left ventricle assist device (CF-LVAD) in advanced heart failure (HF) patients results in clinically relevant improvements in survival, functional capacity, and quality of life. Peripheral artery disease (PAD) can occur in patients with CF-LVAD due to the high rate of concomitance between risk factors for atherosclerosis and HF. Diagnosis of PAD can be difficult in the specific setting of a patient supported by this kind of device because of the marked alteration in waveform morphology and velocity created by the artificial physiology of an LVAD...
February 13, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29433532/is-there-a-difference-in-bleeding-after-left-ventricular-assist-device-implant-centrifugal-versus-axial
#3
Ann C Gaffey, Carol W Chen, Jennifer J Chung, Jason Han, Christian A Bermudez, Joyce Wald, Pavan Atluri
BACKGROUND: Continuous-flow left ventricular assist devices (CF-LVAD) have become the standard of care for patients with end stage heart failure. Device reliability has increased, bringing the potential for VAD, compared to transplant, into debate. However, complications continue to limit VADs as first line therapy. Bleeding is a major morbidity. A debate exists as to the difference in bleeding profile between the major centrifugal and axial flow devices. We hypothesized that there would be similar adverse bleeding event profiles between the 2 major CF-LVADs...
February 13, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29394347/prognostic-value-of-3-dimensional-echocardiographical-heart-volume-assessment-in-patients-scheduled-for-left-ventricular-assist-device-implantation
#4
Albert Otten, Stephan Kurz, Sibtain Anwar, Jevgenij Potapov, Christian Krall, Benjamin O'Brien, Helmut Habazettl, Thomas Krabatsch, Marian Kukucka
OBJECTIVES: Left ventricular assist device (LVAD) support is an increasingly important and successful therapeutic option for patients with end-stage heart failure. As chronic heart failure progresses, the left and right ventricles adapt by enlarging its volume and patients present for LVAD implantation with varying degrees of dilatation. By quantitatively assessing right ventricular (RV) and left ventricular (LV) volumes using 3D transoesophageal echocardiography and correlating the findings with clinical outcomes, we aim to investigate the prognostic value of LV and RV volumes for early survival after LVAD implantation...
January 30, 2018: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29373336/competing-flow-between-partial-circulatory-support-and-native-cardiac-output-a-clinical-computational-fluid-dynamics-study
#5
Jennifer Engelke, Christof Karmonik, Fabian Rengier, Sasan Partovi, Aron-Frederik Popov, Anja Osswald, Rawa Arif, Bastian Schmack, Philip Raake, André R Simon, Andreas Doesch, Alexander Weymann, Joachim Lotz, Matthias Karck, Arjang Ruhparwar
Partial circulatory support is a promising concept for the treatment of heart failure patients. A better understanding of induced hemodynamic changes is essential for optimizing treatment efficacy. Computational fluid dynamics (CFD) is an alternative method to gain insight into flow phenomena difficult to obtain in vivo. In 10 patients implanted with a Circulite Synergy Micro-pump (HeartWare) (a continuous flow partial circulatory assist device connecting the left atrium to the right subclavian artery), transient CFD simulations were performed...
October 25, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29372417/effect-of-obesity-on-outcomes-in-patients-undergoing-implantation-of-continuous-flow-left-ventricular-assist-devices
#6
Nastasya Volkovicher, Chitaru Kurihara, Andre Critsinelis, Masashi Kawabori, Tadahisa Sugiura, Marcos Manon, Andrew B Civitello, Jeffrey A Morgan
The purpose of this study was to analyze the effect of obesity on outcomes after continuous-flow left ventricular assist device (CF-LVAD) implantation. A single-center retrospective analysis was performed on 526 chronic heart failure patients who were implanted with the HeartMate II CF-LVAD (n = 403) or HeartWare HVAD (n = 123) between November 2003 and March 2016. Patients were stratified into 4 groups based on BMI: underweight (< 18.5 kg/m2, n = 18, 3.4%), normal-weight (18.5-25 kg/m2, n = 173, 32...
January 25, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29364552/troubleshooting-electromagnetic-interference-in-a-patient-with-centrifugal-flow-left-ventricular-assist-device-and-subcutaneous-implantable-cardioverter-defibrillator
#7
Asim S Ahmed, Parin J Patel, Shiv Bagga, Jasen L Gilge, Thomas Schleeter, Baqir A Lakhani, Ashwin K Ravichandran, Steve Donnelley, Venu Allavatam, Eric N Prystowsky, Benzy J Padanilam
A 25-year-old man with severe non-ischemic dilated cardiomyopathy underwent subcutaneous implantable cardioverter defibrillator (S-ICD) implant and subsequently underwent Heartware ventricular assist device (HVAD) placement. Post-operative interrogation revealed both primary and secondary S-ICD vectors inappropriately regarded sinus rhythm as "noise," and the alternate vector significantly under-sensed sinus rhythm. The S-ICD was re-interrogated using high resolution capture to visually confirm EMI with a dominant frequency in both the primary and secondary vectors of 46...
January 24, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29341175/investigation-of-the-axial-gap-clearance-in-a-hydrodynamic-passive-magnetically-levitated-rotary-blood-pump-using-x-ray-radiography
#8
Bente Thamsen, Mathieu Plamondon, Marcus Granegger, Marianne Schmid Daners, Rolf Kaufmann, Antonia Neels, Mirko Meboldt
The HeartWare HVAD is a radial rotary blood pump with a combination of passive magnetic and hydrodynamic bearings to levitate the impeller. The axial gap size between impeller and housing in this bearing and its sensitivity to speed, flow, and pressure difference is difficult to assess. Shear stresses are exceptionally high in this tiny gap making it important for blood damage and related adverse events. Therefore, the aim of this study was to measure the axial gap clearance in the HVAD at different operating conditions employing radiography...
January 17, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29336405/looking-inside-the-third-generation-left-ventricular-assist-device-using-color-doppler-transesophageal-echocardiography
#9
Ankit Jain, Frederick C Cobey
HeartWare is a third-generation continuous flow left ventricular assist device (LVAD) and generates centrifugal pattern of blood flow. In the perioperative setting, interrogating the HeartWare devices is very difficult due to the interference of the Doppler by the impeller frequency and generation of the waterfall artifact. We present a case where using color Doppler a view "inside" the impeller can be seen which corresponds to the centrifugal flow of blood. With time, these images can be looked into in pathological states such as pump thrombosis, to come to a more meaningful conclusion regarding the flow of blood within the centrifugal chamber...
January 2018: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/29305851/quantitative-assessment-of-inflow-malposition-in-two-continuous-flow-left-ventricular-assist-devices
#10
Erik N Sorensen, Zachary N Kon, Erika D Feller, Si M Pham, Bartley P Griffith
BACKGROUND: We previously investigated preoperative variables associated with qualitative inflow cannula (IFC) malposition in the Heartmate II continuous-flow left ventricular assist device. In this report, we assess IFC malposition quantitatively in recipients of both the Heartmate II and the Heartware and examine its association with device thrombosis. METHODS: Malposition was quantified based on angular deviation from a hypothetical ideal IFC position in two orthogonal computed tomography (CT) imaging planes...
January 3, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29290308/continuous-flow-left-ventricular-assist-device-implantation-in-patients-with-a-small-left-ventricle
#11
Masashi Kawabori, Chitaru Kurihara, Tadahisa Sugiura, William E Cohn, Andrew B Civitello, O Howard Frazier, Jeffrey A Morgan
BACKGROUND: Having a preoperative small left ventricle (LV) has been associated with higher complication and mortality rates after left ventricular assist device (LVAD) implantation; however, the outcomes after continuous-flow LVAD implantation have not been well studied. This is the first large-scale analysis of long-term survival after continuous-flow LVAD implantation in patients with a preoperative small LV. METHODS: Our cohort comprised 511 patients who underwent primary implantation of a HeartMate II (n = 393 [Thoratec, Pleasanton, CA]) or HeartWare HVAD (n = 118 [HeartWare International, Framingham, MA]) at our institution between November 2003 and March 2016...
December 28, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29282819/platelet-activation-is-a-preoperative-risk-factor-for-the-development-of-thromboembolic-complications-in-patients-with-continuous-flow-left-ventricular-assist-device
#12
Filippo Consolo, Giulia Sferrazza, Giulia Motolone, Rachele Contri, Lorenzo Valerio, Rosalba Lembo, Loris Pozzi, Patrizia Della Valle, Michele De Bonis, Alberto Zangrillo, Gianfranco B Fiore, Alberto Redaelli, Marvin J Slepian, Federico Pappalardo
AIMS: To correlate the dynamics of platelet activation with the development of thromboembolic events in patients with continuous-flow left ventricular assist device (cf-LVAD). METHODS AND RESULTS: The platelet activity state (PAS) assay was utilized to evaluate platelet activation in 68 cf-LVAD patients implanted with the HeartMate II (n = 15, 22%), HeartMate 3 (n = 15, 22%), or HeartWare HVAD (n = 38, 56%). PAS was measured preoperatively, early post-implant, and at long-term follow-up (1, 3, 6, 12, 18, and 24 months post-implant)...
December 28, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29261572/gastrointestinal-bleeding-in-patients-with-heartware-ventricular-assist-device-does-the-activation-of-the-lavare-cycle-make-a-difference
#13
Diyar Saeed, Bujar Maxhera, Najla Sadat, Georgi Petrov, Alexander Albert, Artur Lichtenberg
We aimed to investigate the prevalence of gastrointestinal bleeding (GIB) events in patients supported with HeartWare ventricular assist device (VAD) and activated lavare cycle. Thirty-two GIB events were documented in 22 patients (21%) after median support duration of 22 days (IQR: 11-157 days). There were 13 patients with early episodes of GIB. Meanwhile, 17 GIB events were documented in 9 patients after a median support duration of 174 days (IQR 25-736 days) (late bleeders), accounting for 0.18 events per patient's years...
January 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29223289/frequency-and-consequences-of-right-sided-heart-failure-after-continuous-flow-left-ventricular-assist-device-implantation
#14
Chitaru Kurihara, Andre C Critsinelis, Masashi Kawabori, Tadahisa Sugiura, Gabriel Loor, Andrew B Civitello, Jeffrey A Morgan
Postoperative right-sided heart failure (RHF) is a common complication after continuous-flow left ventricular assist device implantation. Studies have examined RHF in the perioperative period, but few have assessed late-onset RHF. We analyzed the incidence of early and late RHF in patients with HeartMate II and HeartWare left ventricular assist devices and associated morbidity, mortality, and independent predictors of RHF. We retrospectively analyzed records of 526 patients with chronic heart failure who underwent continuous-flow left ventricular assist device implantation; 147 (27...
October 31, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29206805/axial-to-centrifugal-continuous-flow-lvad-pump-exchange-using-minimally-invasive-technique
#15
Amit A Pawale, Ariel Farkash, Dimosthenis Pandis, Anelechi C Anyanwu
Driveline or device infection may complicate left ventricular assist device implants, and only curative option may be pump exchange. Replacement with similar device may be liable to reinfection, because pump configuration is such that the new device and driveline may partly lie within the pocket of the previous pump. One approach to overcome this is using a different pump design such that the new pump would lie in a different location from the old pump. We describe treatment of severe HeartMate II (Abbott, [St Jude Thoratec Corp], Pleasanton, CA USA) left ventricular assist device infection by minimally invasive exchange to an intrapericardial HVAD (HeartWare International, Inc, Framingham, MA USA) left ventricular assist device...
November 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/29197135/biventricular-support-with-heartware-ventricular-assist-device-in-a-pediatric-patient
#16
Shriprasad R Deshpande, Mallory M Carroll, Chad Mao, William T Mahle, Kirk Kanter
Use of ventricular assist devices is increasing in the pediatric population. This has included the extended use of adult continuous-flow devices in the pediatric population. In a minority of cases, biventricular support may be needed. In these situations, biventricular support with continuous-flow devices can be surgically challenging, and therefore, only few cases have been reported. Here, we present a case of implantation of two HeartWare HVAD devices for biventricular support for a decompensating patient with acute myocarditis as well as present an alternative implantation surgical strategy...
December 1, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/29174532/acute-kidney-injury-and-1-year-mortality-after-left-ventricular-assist-device-implantation
#17
Rahatullah Muslem, Kadir Caliskan, Sakir Akin, Kavita Sharma, Nisha A Gilotra, Alina A Constantinescu, Brian Houston, Glenn Whitman, Ryan J Tedford, Dennis A Hesselink, Ad J J C Bogers, Stuart D Russell, Olivier C Manintveld
BACKGROUND: Data on the consequences of acute kidney injury (AKI) after continuous-flow left ventricle assist device (LVAD) implantation are scarce and inconsistent. In this study, we evaluated the incidence, predictors and the impact of AKI on mortality and renal function in the first year after LVAD implantation. METHODS: A retrospective, multicenter cohort study was conducted, including all patients (age ≥18 years) undergoing LVAD implantation (91% with a HeartMate II device and 9% with a HeartWare device)...
November 6, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/29165737/management-of-hemostasis-for-pediatric-patients-on-ventricular-assist-devices
#18
Iki Adachi, Vadim Kostousov, Lisa Hensch, Martin A Chacon-Portillo, Jun Teruya
Ventricular-assist devices (VADs) have seen increased utilization in the pediatric population. Formerly, this therapeutic modality was limited to only the pulsatile VAD, EXCOR (Berlin Heart GmbH). However, the continuous flow VAD devices, HeartMate II (Abbott Inc.) and HeartWare (Medtronic Inc.), are now increasingly used in this population. Postoperatively, VAD patients are acutely anticoagulated using unfractionated heparin, often beginning 24 to 48 hours after VAD placement. Once the patient is stabilized and ready to transition to a lower acuity or outpatient setting, low-molecular-weight heparin or warfarin therapy may be instituted...
November 17, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/29141690/resternotomy-does-not-adversely-affect-outcome-after-left-ventricular-assist-device-implantation
#19
Maria Papathanasiou, Loukas Tsourelis, Nikolaus Pizanis, Achim Koch, Markus Kamler, Tienush Rassaf, Peter Luedike
BACKGROUND: Resternotomy in cardiac surgery is considered a risk factor for postoperative complications. Previous studies have demonstrated an ambiguous relationship between resternotomy and clinical outcomes. Registry data from a mixed population of durable circulatory support devices suggest that history of cardiac surgery is a risk factor for mortality. Our study investigates the prognostic significance of resternotomy in a homogenous cohort of left ventricular assist device (LVAD) recipients...
November 15, 2017: European Journal of Medical Research
https://www.readbyqxmd.com/read/29095735/single-versus-multidrug-regimen-for-surgical-infection-prophylaxis-in-left-ventricular-assist-device-implantation
#20
Nana Aburjania, Brennan M Ertmer, Saira Farid, Melody Berg, Juhsien J C Nienaber, Vakhtang Tchantchaleishvili, John M Stulak, Muhammad R Sohail
Infection is a serious complication of left ventricular assist device (LVAD) therapy. However, an optimal antimicrobial surgical infection prophylaxis (SIP) regimen for LVAD implantation is not well established. We retrospectively reviewed all adults who underwent continuous-flow LVAD implantation from February 2007 to March 2015 at Mayo Clinic Rochester. Left ventricular assist device infection (LVADI) was defined using criteria published by the International Society for Heart and Lung Transplant. Patients excluded from the analysis included those who did not have HeartMate II or HeartWare device, patients with incomplete documentation of SIP, and those with an actively treated infection at the time of LVAD implantation...
October 31, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
keyword
keyword
13574
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"