keyword
MENU ▼
Read by QxMD icon Read
search

HeartMate

keyword
https://www.readbyqxmd.com/read/29331958/platelet-secretion-defects-and-acquired-von-willebrand-syndrome-in-patients-with-ventricular-assist-devices
#1
Ulrich Geisen, Kerstin Brehm, Georg Trummer, Michael Berchtold-Herz, Claudia Heilmann, Friedhelm Beyersdorf, Johannes Schelling, Axel Schlagenhauf, Barbara Zieger
BACKGROUND: The number of implanted ventricular assist devices (VADs) has increased significantly recently. Bleeding, the most frequent complication, cannot be solely attributed to anticoagulation therapy. Acquired von Willebrand syndrome (AVWS) caused by increased shear stress is frequent in VAD patients and can increase the bleeding risk. The HeartMate III (HM III) is a novel left VAD featuring potential improvements over the HeartMate II. METHODS AND RESULTS: In this study, we investigated the prevalence and onset of AVWS in 198 VAD patients...
January 13, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29305851/quantitative-assessment-of-inflow-malposition-in-two-continuous-flow-left-ventricular-assist-devices
#2
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/29304409/impeller-pump-model-derived-from-conservation-laws-applied-to-the-simulation-of-the-cardiovascular-system-coupled-to-heart-assist-pumps
#3
Yubing Shi, Theodosios Korakianitis
Previous numerical models of impeller pumps for ventricular assist devices utilize curve-fitted polynomials to simulate experimentally-obtained pressure difference versus flow rate characteristics of the pumps, with pump rotational speed as a parameter. In this paper the numerical model for the pump pressure difference versus flow rate characteristics is obtained by analytic derivation. The mass, energy and angular momentum conservation laws are applied to the working fluid passing through the impeller geometry and coupled with the turbomachine's velocity diagram...
December 22, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29300199/recent-advances-in-heart-failure
#4
Mahwash Kassi, Bashar Hannawi, Barry Trachtenberg
PURPOSE OF REVIEW: Acute heart failure continues to be a challenge as there is limited benefit of numerous agents that have been tested. Cardiac resynchronization therapy remains standard of care, yet timing and need for implantable cardiac defibrillator has been brought into question with the recent randomized trials. Several recent advances have been made towards management of heart failure both in drug and device therapy. The purpose of this review is to provide an update on the most important recent studies on heart failure with reduced ejection fraction (HFrEF) and heart failure with preserved ejection fraction (HFpEF)...
January 2, 2018: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29290308/continuous-flow-left-ventricular-assist-device-implantation-in-patients-with-a-small-left-ventricle
#5
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
#6
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/29259511/tolerance-of-sustained-ventricular-fibrillation-during-continuous-flow-left-ventricular-assist-device-support
#7
Andrew C W Baldwin, Courtney J Gemmato, Elena Sandoval, William E Cohn, Jeffrey A Morgan, O H Frazier
The widespread use of continuous-flow left ventricular assist devices for mechanical circulatory support has shown that long-term hemodynamic support is possible, even when a clinical "pulse" cannot be detected. We present the incidental discovery of ventricular fibrillation in 6 alert, hemodynamically stable patients supported only by a continuous-flow device (HeartMate II, n=5; Jarvik 2000, n=1). Ventricular fibrillation was found in 3 patients during routine outpatient follow-up visits and in 3 awaiting discharge from the hospital after device placement...
October 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/29251634/the-clinical-implication-of-transcranial-doppler-detection-of-microembolic-signals-in-patients-with-heartmate-ii
#8
Kazuki Fukuma, Osamu Seguchi, Kozue Saito, Kensuke Kuroda, Seiko Nakajima, Takuma Sato, Masanobu Yanase, Yorihiko Matsumoto, Satsuki Fukushima, Tomoyuki Fujita, Junjiro Kobayashi, Kazuyuki Nagatsuka, Norihide Fukushima
We aimed to elucidate the clinical relevance of transcranial Doppler (TCD) in the detection of microembolic signals in patients with Heartmate II (HM-II). Twenty patients with HM-II underwent TCD examinations, and microembolic signals were rarely detected in stable patients. However, they were detected in patients with hemolysis and/or thromboembolic events. Further, TCD examination under oxygen inhalation revealed that, both, solid emboli and gaseous emboli exist in patients with HM-II.
December 14, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29248289/is-hemodynamic-transesophageal-echocardiography-needed-for-patients-with-left-ventricular-assist-device
#9
Nataliya Bahatyrevich, Qiong Yang, Nicholas C Cavarocchi, Hitoshi Hirose
BACKGROUND: Interventions in patients with a left ventricular assist device (LVAD) in the intensive care unit (ICU) are typically performed based on the results of conventional monitoring, such as vital signs and Swan-Ganz catheter (SGC) and LVAD parameters. These variables might not always accurately reflect a patient's cardiac function, volume status, and interventricular septal configuration, however. To assess the accuracy of standard monitoring, we performed routine continuous hemodynamic transesophageal echocardiography (hTEE) to evaluate cardiac function, volume status, and septal position...
November 8, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29237991/survival-of-heartmate-ii-patients-despite-cessation-of-anticoagulation%C3%A3-outcomes-and-hemostatic-analysis
#10
Rashad Zayat, Mohammad Amen Khattab, Oliver Grottke, Markus Honickel, Andreas Goetzenich, Ajay Moza, Christian Stoppe, Rüdiger Autschbach, Lachmandath Tewarie
BACKGROUND: In long-term left ventricular assist device (LVAD) therapy, recurrent bleeding events may justify cessation of anticoagulation therapy (AT). However, data about THE safety and risks of AT cessation in LVAD patients are scarce.Methods and Results:Between 2010 and 2015, 128 patients received a HeartMate II (HMII). Following recurrent bleeding events, we ceased vitamin K antagonist (VKA) therapy in 13 patients (10%) (no-VKA group). To characterize the hemostatic profile, we performed von Willebrand factor (vWF), platelet function (PF), and other hemostatic tests in all HMII patients...
December 12, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29226531/pre-implant-left-ventricular-apex-position-predicts-risk-of-heartmate-ii-pump-thrombosis
#11
Leora T Yarboro, James Hunter Mehaffey, Robert B Hawkins, Irving L Kron, Gorav Ailawadi, John A Kern, Ravi K Ghanta
BACKGROUND: Thrombosis within a left ventricular assist device (LVAD) is a devastating complication that often necessitates device exchange. Few studies have evaluated the relationship between patient anatomy and pump thrombosis. We hypothesize that lateral displacement of the left ventricular (LV) apex increases risk for pump thrombosis. METHODS: All patients who underwent primary implantation of a HeartMate II (HM2) device (Thoratec, Pleasanton, CA) at a single center (2009-2015) were evaluated...
December 10, 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/29223289/frequency-and-consequences-of-right-sided-heart-failure-after-continuous-flow-left-ventricular-assist-device-implantation
#12
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/29217463/electrical-storm-in-the-early-phase-of-heartmate%C3%A2-ii-device-implantation-incidence-risk-factors-and-prognosis
#13
Jerome Corre, François Picard, Rodrigue Garcia, Adlane Zemmoura, Nicolas Derval, Arnaud Denis, Antoine Romen, Karine Nubret, Pierre Jais, Michel Haissaguerre, Pierre Dos Santos, Laurent Barandon, Frederic Sacher
BACKGROUND: Ventricular arrhythmia is common after left ventricular assist device (LVAD) implantation, especially in the early postoperative phase (<30 days). AIM: To identify the incidence of and risk factors for electrical storm (ES) occurring within 30 days of HeartMate® II implantation. METHODS: We reviewed data from all consecutive patients undergoing HeartMate® II device implantation at our institution from January 2008 to December 2014...
December 4, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/29210774/liberal-right-ventricular-assist-device-extracorporeal-membrane-oxygenation-support-for-right-ventricular-failure-after-implantable-left-ventricular-assist-device-placement
#14
Quentin Fischer, Matthias Kirsch
Refractory right ventricular failure (RVF) after implantation of left ventricular assist device (LVAD) is a dramatic complication. The addition of right ventricular assist device (RVAD) may improve RV recovery and lead to improve outcomes. From February 2012 to September 2014, 44 patients received a HeartMate II. These patients were retrospectively compared in two groups according to early liberal implantation of an extracorporeal membrane oxygenation (ECMO) used as a RVAD established between a femoral vein and the pulmonary artery...
November 27, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
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/29200070/perioperative-management-of-the-patient-with-a-left-ventricular-assist-device-for-noncardiac-surgery
#16
Mabel Chung
The pandemic of heart failure and the limited options for treatment of end-stage disease have resulted in an increase in the utilization of left ventricular assist devices (LVADs). Improvements in device technology and patient survival have led to an expanding population of patients requiring noncardiac surgery while on LVAD therapy, thus leading to a growing need for familiarity with the physiology of these patients. This review describes the functional mechanics of the most prevalent continuous-flow LVAD, the HeartMate II, and focuses on perioperative anesthetic concerns...
November 30, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29198630/long-term-survival-in-patients-receiving-a-continuous-flow-left-ventricular-assist-device
#17
Igor Gosev, Michael S Kiernan, Peter Eckman, Behzad Soleimani, Ahmet Kilic, Nir Uriel, Johnatan D Rich, Jason N Katz, Jennifer Cowger, Brian Lima, Siobhan McGurk, Meredith A Brisco-Bacik, Sanjin Lee, Susan M Joseph, Chetan B Patel
BACKGROUND: Long-term survivors after implantation of left ventricular assist devices (LVADs) are increasing in prevalence. We describe the characteristics and outcomes in patients surviving longer than 4 years on LVAD support. METHODS: We performed a multicenter, retrospective analysis of patients surviving at least 4 years on continuous-flow LVAD (CF-LVAD) support with a HeartMate II at centers participating in the Evolving Mechanical support Research Group. RESULTS: Between 2005 and 2010, 156 long-term survivors were identified with a mean survival of 7...
December 1, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29174532/acute-kidney-injury-and-1-year-mortality-after-left-ventricular-assist-device-implantation
#18
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
#19
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/29154131/impact-of-age-sex-therapeutic-intent-race-and-severity-of-advanced-heart-failure-on-short-term-principal-outcomes-in-the-momentum-3-trial
#20
Daniel J Goldstein, Mandeep R Mehra, Yoshifumi Naka, Christopher Salerno, Nir Uriel, David Dean, Akinobu Itoh, Francis D Pagani, Eric R Skipper, Geetha Bhat, Nirav Raval, Brian A Bruckner, Jerry D Estep, Rebecca Cogswell, Carmelo Milano, Lahn Fendelander, John B O'Connell, Joseph Cleveland
BACKGROUND: Primary outcomes analysis of the Multicenter Study of MagLev Technology in Patients Undergoing MCS Therapy With HeartMate 3 (MOMENTUM 3) trial short-term cohort demonstrated a higher survival rate free of debilitating stroke and reoperation to replace/remove the device (primary end-point) in patients receiving the HeartMate 3 (HM3) compared with the HeartMate (HMII). In this study we sought to evaluate the individual and interactive effects of pre-specified patient subgroups (age, sex, race, therapeutic intent [bridge to transplant/bridge to candidacy/destination therapy] and severity of illness) on primary end-point outcomes in MOMENTUM 3 patients implanted with HM3 and HMII devices...
November 3, 2017: Journal of Heart and Lung Transplantation
keyword
keyword
13573
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"