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https://www.readbyqxmd.com/read/29095736/outcomes-with-the-tandem-protek-duo-dual-lumen-percutaneous-right-ventricular-assist-device
#1
Ashwin K Ravichandran, David A Baran, Kelly Stelling, Jennifer A Cowger, Christopher T Salerno
Recently, a percutaneous right ventricular assist device (RVAD) called the TandemLife Protek Duo (TPD; TandemLife, Pittsburgh, PA) has been introduced. The Protek Duo (TPD) is a temporary RVAD placed via the right internal jugular vein, capable of providing up to 4.5 L of flow. We report a two-center experience using the TPD in 17 patients with right ventricular (RV) failure, 12 of whom were post-left ventricular assist device (LVAD) implantation.
October 31, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29084066/sex-specific-outcome-disparities-in-patients-receiving-continuous-flow-left-ventricular-assist-devices-a-systematic-review-and-meta-analysis
#2
Vanessa Blumer, Rodrigo Mendirichaga, Gabriel A Hernandez, Gerardo Zablah, Sandra V Chaparro
Continuous-flow left ventricular assist devices (CF-LVADs) decrease mortality and improve quality of life in patients with advanced heart failure (HF). Their widespread utilization has led to concerns regarding increased adverse effects, especially in women. Nevertheless, sex-specific data remain limited. We searched Medline, Embase, Scopus, and the Cochrane Library for publications reporting sex-specific outcomes after CF-LVADs from January 2008 through January 2017. Outcomes were compared under the random-effects model and heterogeneity examined via χ test and I statistics...
October 26, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29076947/left-versus-biventricular-assist-devices-in-cardiac-arrest
#3
Erik J S Packer, Grete Slettom, Atle Solholm, Arve Mongstad, Rune Haaverstad, Vegard Tuseth, Ketil Grong, Jan Erik Nordrehaug
Maintaining adequate organ perfusion during cardiac arrest remains a challenge, and various assist techniques have been evaluated. We assessed whether a right ventricular impeller assist device (RVAD) in adjunct to a left ventricular impeller assist device (LVAD) is beneficial. Twenty anesthetized pigs were randomized to maximized circulatory support by percutaneously implanted left- or biventricular assist device(s) during 30 minutes of electrically induced ventricular fibrillation followed by three attempts of cardioversion...
October 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29021348/early-right-ventricular-assist-device-use-in-patients-undergoing-continuous-flow-left-ventricular-assist-device-implantation-incidence-and-risk-factors-from-the-interagency-registry-for-mechanically-assisted-circulatory-support
#4
Michael S Kiernan, E Wilson Grandin, Marshall Brinkley, Navin K Kapur, Duc Thinh Pham, Robin Ruthazer, J Eduardo Rame, Pavan Atluri, Edo Y Birati, Guilherme H Oliveira, Francis D Pagani, James K Kirklin, David Naftel, Robert L Kormos, Jeffrey J Teuteberg, David DeNofrio
BACKGROUND: To investigate preimplant risk factors associated with early right ventricular assist device (RVAD) use in patients undergoing continuous-flow left ventricular assist device (LVAD) surgery. METHODS AND RESULTS: Patients in the Interagency Registry for Mechanically Assisted Circulatory Support who underwent primary continuous-flow-LVAD surgery were examined for concurrent or subsequent RVAD implantation within 14 days of LVAD. Risk factors for RVAD implantation and the combined end point of RVAD or death within 14 days of LVAD were assessed with stepwise logistic regression...
October 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28970073/outcomes-of-restrictive-and-hypertrophic-cardiomyopathies-after-lvad-an-intermacs-analysis
#5
Snehal R Patel, Omar Saeed, David Naftel, Susan Myers, James Kirklin, Ulrich P Jorde, Daniel J Goldstein
BACKGROUND: Patients with restrictive (RCM) and hypertrophic (HCM) cardiomyopathies are felt to be a difficult population to treat with left ventricular assist device (LVAD) therapy. Scarce data exist on outcomes of continuous-flow (CF) LVAD support in these challenging patient cohorts. METHODS: The Interagency Registry for Mechanically Assisted Circulatory Support Registry was queried for all patients with RCM (n = 94) and HCM (n = 104) who underwent CF LVAD implantation between March 2008 and March 2014...
September 29, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28938308/sensor-based-physiologic-control-strategy-for-biventricular-support-with-rotary-blood-pumps
#6
Yu Wang, Steven C Koenig, Zhongjun Wu, Mark S Slaughter, Guruprasad A Giridharan
Rotary biventricular assist devices (BiVAD) are becoming a clinically accepted treatment option for end-stage biventricular failure. To improve BiVAD efficacy and safety, we propose a control algorithm to achieve the clinical objectives of maintaining left-right-sided balance, restoring physiologic flows, and preventing ventricular suction. The control algorithm consists of two proportional-integral (PI) controllers for left and right ventricular assist devices (LVAD and RVAD) to maintain differential pump pressure across LVAD (ΔPL) and RVAD (ΔPR) to provide left-right balance and physiologic flow...
September 21, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28853178/the-ab-portable-driver-generates-higher-drive-line-pressures-possibly-leading-to-accelerated-hemolysis
#7
Motohiko Goda, Naoto Yabu, Norihisa Tominaga, Daisuke Machida, Yukihisa Isomatsu, Shinichi Suzuki, Manabu Nitta, Naohiro Komura, Naoki Nakayama, Masayoshi Kiyokuni, Teruyasu Sugano, Munetaka Masuda
The AB5000 Circulatory Support System is paracorporeal pulsatile ventricular assist device. The AB Portable Driver is a portable console for this system. We experienced two cases with accelerated hemolysis while receiving support by the AB Portable Driver. The purpose of this study was to clarify the mechanical differences associated with the hemolysis between the AB5000 console and the AB Portable Driver. The mock circulatory system modeled by an AB5000 ventricle and a blood sampling bag of vinyl chloride was run with an AB5000 console or AB Portable Driver...
August 29, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28741841/pulmonary-valve-opening-with-two-rotary-left-ventricular-assist-devices-for-biventricular-support
#8
Eric L Wu, Frank Nestler, Matthias Kleinheyer, Michael C Stevens, Jo P Pauls, John F Fraser, Shaun D Gregory
Right ventricular failure is a common complication associated with rotary left ventricular assist device (LVAD) support. Currently, there is no clinically approved long-term rotary right ventricular assist device (RVAD). Instead, clinicians have implanted a second rotary LVAD as RVAD in biventricular support. To prevent pulmonary hypertension, the RVAD must be operated by either reducing pump speed or banding the outflow graft. These modes differ in hydraulic performance, which may affect the pulmonary valve opening (PVO) and subsequently cause fusion, valvular insufficiency, and thrombus formation...
July 25, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28731484/cpr-ecls-bvad-and-successful-heart-transplantation-within-2-months-a-single-centre-case-series-in-two-young-high-urgency-listed-patients
#9
Anna K Schmidt, Diyar Saeed, Arash Mehdiani, Bozena Sowinski, Ralf Westenfeld, Payam Akhyari, Artur Lichtenberg, Udo Boeken
INTRODUCTION: In times of organ shortage, death while on the heart waiting-list still represents a major problem. As a consequence, bridging to transplant as well as the decision when to escalate therapy play a very important role. METHODS AND RESULTS: We report on two young patients with dilated cardiomyopathy and acute decompensation who were successfully bridged to heart transplantation with both left and temporary right ventricular assist devices in just 2 months...
July 20, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28578933/extracorporeal-membrane-oxygenation-pulmonary-embolectomy-and-right-ventricular-assist-device-for-massive-pulmonary-embolism
#10
Carly L Lodewyks, Joseph M Bednarczyk, Owen T Mooney, Rakesh C Arora, Rohit K Singal
Consensus regarding the management of massive pulmonary embolism (PE) and persistent shock after thrombolysis is lacking. A 30-year-old man collapsed with massive PE 3 days after an exploratory laparotomy for penetrating trauma, and he remained hypoxic and hypotensive despite thrombolytic therapy. Extracorporeal membrane oxygenation (ECMO) was instituted as a bridge to surgical embolectomy, and placement of a right ventricular assist device (RVAD) was used to facilitate separation from cardiopulmonary bypass...
July 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28565729/combined-endoscopic-and-surgical-treatment-of-severe-gastrointestinal-bleeding-in-a-patient-with-heart-assist-device-under-therapeutic-anticoagulation
#11
Edris Wedi, Mohamed Bounnah, Riccardo Memeo, Carlo Jung
Gastrointestinal (GI) bleeding is a common complication after heart assist device placement. Reasons for bleeding are multifactorial. Endoscopic therapy is the treatment of choice, whereas invasive procedures are avoided in these critically ill patients. We present the case of a 65-year-old male patient experiencing severe GI bleeding after left ventricular assist device (LVAD) and right ventricular assist device (RVAD) placement with therapeutic anticoagulation. Endoscopically, multiple gastric bleeding sources were found but could not be treated effectively due to a large blood clot...
June 1, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28509676/isolated-right-ventricular-mechanical-support-outcomes-and-prognosis
#12
Teresa A Mulaikal, Laura H Bell, Boyangzi Li, Gebhard Wagener, Hiroo Takayama
Right ventricular (RV) failure that necessitates isolated mechanical support is extremely rare. Outcomes have not been described and are limited to case reports. We sought to evaluate this select group of patients and determine their 30 day and 1 year survival. We retrospectively reviewed the Mechanical Assist Device Database at Columbia University from 2007 to 2015. Inclusion criteria consisted of patients who received isolated RV assist devices (RVADs) without mechanical support of the left ventricle. We evaluated survival, duration of support, intensive care unit (ICU) length of stay, and adverse events...
May 12, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28498293/what-is-the-actual-3d-representation-of-the-rib-vertebra-angle-difference-mehta-s-angle
#13
Rob C Brink, Tom P C Schlösser, Marijn van Stralen, Koen L Vincken, Moyo C Kruyt, Winnie C W Chu, Jack C Y Cheng, René M Castelein
STUDY DESIGN: Cross-sectional study. OBJECTIVE: To establish the relevance of the conventional two-dimensional (2D) RVAD and the relationship with the complex three-dimensional (3D) apical morphology in scoliosis. SUMMARY OF BACKGROUND DATA: The rib vertebra angle difference (RVAD, also known as Mehta's angle) describes apical rib asymmetry on conventional radiographs and was introduced as a prognostic factor for curve severity in early onset scoliosis, and later applied to other types of scoliosis as well...
May 11, 2017: Spine
https://www.readbyqxmd.com/read/28488003/daily-transient-discontinuation-of-extracorporeal-lvad-to-prevent-thromboembolism-of-mechanical-aortic-valve-prosthesis
#14
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/28329284/contemporary-outcome-of-unplanned-right-ventricular-assist-device-for-severe-right-heart-failure-after-continuous-flow-left-ventricular-assist-device-insertion
#15
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/28325006/a-simplified-state-space-model-of-biventricular-assist-device-cardiovascular-system-interaction
#16
Vivian C A Koh, Einly Lim, Boon Chiang Ng, Yong Kuen Ho, Nigel H Lovell
A simplified state-space model of biventricular assist device (BiVAD)-cardiovascular system (CVS) interaction is presented. The state-space equations includes a six-compartments CVS model incorporating the ventricles, the pulmonary and systemic circulations as well as the non-linear behavior of the valve flow, together with a left ventricular assist device (LVAD) and a right ventricular assist device (RVAD) component. The left and right pump speeds serve as the input variables for the state-space model. The model is simulated with three operational modes, i...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28319524/combined-therapy-of-ventricular-assist-device-and-membrane-oxygenator-for-profound-acute-cardiopulmonary-failure
#17
Kevin Fujita, Koji Takeda, Boyangzi Li, Christine Mauro, Paul Kurlansky, Sowmyashree Sreekanth, Jiho Han, Lauren K Truby, A Reshad Garan, Veli Topkara, Melana Yuzefpolskaya, Paolo Colombo, Yoshifumi Naka, Hiroo Takayama
Short-term ventricular assist devices (ST-VADs) have been effective in treating the patients with refractory cardiogenic shock. Membrane oxygenators (MOs) can be added to the circuit for concomitant, profound refractory hypoxia. This study reports the 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...
November 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28227467/a-simplified-state-space-model-of-biventricular-assist-device-cardiovascular-system-interaction
#18
Vivian C A Koh, Einly Lim, Boon Chiang Ng, Yong Kuen Ho, Nigel H Lovell, Vivian C A Koh, Einly Lim, Boon Chiang Ng, Yong Kuen Ho, Nigel H Lovell, Boon Chiang Ng, Einly Lim, Vivian C A Koh, Nigel H Lovell, Yong Kuen Ho
A simplified state-space model of biventricular assist device (BiVAD)-cardiovascular system (CVS) interaction is presented. The state-space equations includes a six-compartments CVS model incorporating the ventricles, the pulmonary and systemic circulations as well as the non-linear behavior of the valve flow, together with a left ventricular assist device (LVAD) and a right ventricular assist device (RVAD) component. The left and right pump speeds serve as the input variables for the state-space model. The model is simulated with three operational modes, i...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28118263/outcomes-of-minimally-invasive-temporary-rvad-support-for-acute-right-ventricular-failure-during-minimally-invasive-lvad-implantation
#19
Andreas Schaefer, Daniel Reichart, Alexander M Bernhardt, Mathias Kubik, Markus J Barten, Florian M Wagner, Hermann Reichenspurner, Sebastian A Philipp, Tobias Deuse
Right ventricular failure (RVF) may still occur despite the benefits of minimally-invasive left ventricular assist device (MI-LVAD) implantation. Our center strategy aims to avoid aggressive postoperative inotrope use by utilizing mechanical support to facilitate RV recovery and adaptation. We herein report first outcomes of patients with minimally-invasive temporary right ventricular assist device (MI-t-RVAD) support for RVF during MI-LVAD implantation.RVF was defined as requiring more than moderate inotopic support after weaning from cardiopulmonary bypass according to INTERMACS adverse event definitions...
January 20, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28111176/procalcitonin-dynamics-after-long-term-ventricular-assist-device-implantation
#20
Jiri Kettner, Martin Holek, Janka Franekova, Antonin Jabor, Marian Pindak, Hynek Riha, Josef Kautzner, Jan Pirk
BACKGROUND: Infectious complications (IC) are one of the main causes of worsening prognosis after long-term ventricular assist device (LVAD) implantation. Procalcitonin (PCT) is widely used for diagnosis of a bacterial infection. The objective of this study was to assess PCT dynamics after LVAD surgery and their relationship to the infectious complications. METHODS: A total of 25 consecutive patients indicated for LVAD implantation as a bridge to heart transplant were included...
November 16, 2016: Heart, Lung & Circulation
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