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https://www.readbyqxmd.com/read/29153213/-circulatory-assistance-an-alternative-to-heart-transplantation
#1
Jean-Christian Roussel, Thomas Sénage
Circulatory assistance is developing as a treatment for patients with end-stage heart failure. There are two alternative devices: a univentricular circulatory assist pump, or a total artificial heart. It is used to bridge the time to transplantation and, increasingly, as a definitive alternative to a heart transplant.
November 2017: Soins; la Revue de Référence Infirmière
https://www.readbyqxmd.com/read/29149978/perioperative-prophylaxis-for-total-artificial-heart-transplantation
#2
H E Chambers, P Pelish, F Qiu, D F Florescu
BACKGROUND: Practice variation regarding perioperative antimicrobial prophylaxis in total artificial heart transplantations (TAH-t) across institutions is unknown. The aim of our survey was to assess the current practices for prevention of infection in TAH-t recipients among different programs. METHODS: An electronic survey was sent to programs that implant Syncardia TAH (Syncardia Systems, Tuscon, Ariz, USA). Proportions were analyzed for categorical variables; means and SDs were analyzed for continuous variables...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29135479/use-of-remote-pulmonary-artery-pressure-monitoring-cardiomems-system-in-total-artificial-heart-to-assess-pulmonary-hemodynamics-for-heart-transplantation
#3
Salman Gohar, Ziad Taimeh, Jeff Morgan, O H Frazier, Francisco Arabia, Andrew Civitello, Ajith Nair
The temporary total artificial heart (TAH-t) has been valuable as a bridge to transplantation in patients with biventricular failure. However, the challenges of accurately assessing pulmonary vascular resistance after TAH-t implantation can preclude these patients from heart transplantation, especially those with pre-existing pulmonary hypertension. The CardioMEMS Heart Failure System (St. Jude's Medical, Little Canada, MN) comprises a wireless pressure sensor that is implanted percutaneously in the pulmonary artery and transmits real-time measurements of pulmonary artery pressures...
November 8, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29110413/successful-heart-transplantation-in-patients-with-total-artificial-heart-infections
#4
Sarah Taimur, Timothy Sullivan, Mennakshi Rana, Gopi Patel, Julie Roldan, Kimberly Ashley, Sean Pinney, Anelechi Anyanwu, Shirish Huprikar
BACKGROUND: Data are limited on clinical outcomes in patients awaiting heart transplant (HT) with total artificial heart (TAH) infections (TAHIs). METHODS: We retrospectively reviewed all TAH recipients at our center. TAHI was classified as definite if a microorganism was isolated in cultures from the exit site or deep tissues around the TAH, as probable in patients without surgical or microbiologic evidence of infection but no other explanation for persistent or recurrent bloodstream infection (BSI); or possible in patients with clinical suspicion and radiographic findings suggestive of TAHI, but without surgical intervention or microbiologic evidence...
November 7, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/29099541/pulmonary-arteriovenous-extracorporeal-membrane-oxygenation-to-avoid-pulmonary-overflow-during-total-artificial-heart-implantation
#5
Vakhtang Tchantchaleishvili, Jessica G Y Luc, Fabio Sagebin, Joshua K Wong, Howard T Massey
Total artificial hearts (TAH) can be used as a bridge to transplant or, occasionally, as destination therapy for patients with severe biventricular dysfunction. Not infrequently TAHs are placed in patients with severe low flow states, in which the lungs of these patients are unable to adjust rapidly to the "normal" right ventricular output of a TAH. These patients may develop variable degrees of pulmonary edema secondary to stress failure of the pulmonary capillaries requiring increased respiratory support, which can occasionally be fatal...
November 2, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/29094038/intracorporeal-heat-distribution-from-fully-implantable-energy-sources-for-mechanical-circulatory-support-a-computational-proof-of-concept-study
#6
Jacopo Biasetti, Aliaksei Pustavoitau, Pier Giorgio Spazzini
Mechanical circulatory support devices, such as total artificial hearts and left ventricular assist devices, rely on external energy sources for their continuous operation. Clinically approved power supplies rely on percutaneous cables connecting an external energy source to the implanted device with the associated risk of infections. One alternative, investigated in the 70s and 80s, employs a fully implanted nuclear power source. The heat generated by the nuclear decay can be converted into electricity to power circulatory support devices...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29028652/novel-dry-lab-training-method-for-totally-endoscopic-coronary-anastomosis-a-pilot-study
#7
Kosuke Ujihira, Akira Yamada
OBJECTIVE: We describe our original dry-lab training system for nonrobotic and beating heart endoscopic coronary artery anastomosis. METHODS: All the materials used for this training were commercially available. We selected a boxed machine, which can produce pulsatile movements of artificial vessels, and on its roof, we installed a two-dimensional home video camera and a monitor. A multiple-holed plate was placed in front of the machine, and through these holes, a trainee inserted endoscopic surgical instruments and anastomosed the artificial vessels by running fashion while watching the monitor...
September 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28987857/intracranial-hemorrhage-in-patients-with-durable-mechanical-circulatory-support-devices-institutional-review-and-proposed-treatment-algorithm
#8
Wyatt L Ramey, Robyn L Basken, Christina M Walter, Zain Khalpey, G Michael Lemole, Travis M Dumont
OBJECTIVE: Spontaneous intracranial hemorrhage (ICH) is frequently managed in neurosurgery. Patients with durable mechanical circulatory support devices, including total artificial hearts (TAHs) and left ventricular assist devices (LVADs) are often encountered in the setting of ICH. While durable mechanical circulatory support devices have improved survival and quality of life for patients with advanced heart failure, ICH is one of the most feared complications following LVAD and TAH implantation...
October 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28986001/a-bioprosthetic-total-artificial-heart-for-end-stage-heart-failure-results-from-a-pilot-study
#9
Christian Latrémouille, Alain Carpentier, Pascal Leprince, Jean-Christian Roussel, Bernard Cholley, Elodie Boissier, Eric Epailly, Antoine Capel, Piet Jansen, David M Smadja
BACKGROUND: The electro-hydraulically actuated Carmat total artificial heart (C-TAH) is designed to replace the heart in patients with end-stage heart failure, either as bridge to transplant or destination therapy. It provides pulsatile flow and contains bio-prosthetic blood contacting materials. A clinical feasibility study was conducted to evaluate the C-TAH safety and performance. METHODS: Hospitalized patients, at imminent risk of death from irreversible biventricular failure despite optimal medical management, and not eligible for transplant or eligible but on extracorporeal life support, were enrolled...
September 14, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28965736/second-annual-pediatric-interagency-registry-for-mechanical-circulatory-support-pedimacs-report-pre-implant-characteristics-and-outcomes
#10
Elizabeth D Blume, Christina VanderPluym, Angela Lorts, J Timothy Baldwin, Joseph W Rossano, David L S Morales, Ryan S Cantor, Marissa A Miller, James D St Louis, Devin Koehl, David L Sutcliffe, Pirooz Eghtesady, James K Kirklin, David N Rosenthal
BACKGROUND: Expanded use of pediatric ventricular assist devices (VADs) has decreased mortality in children awaiting heart transplantation. Pediatric Interagency Registry for Mechanical Circulatory Support (Pedimacs), a National Heart, Lung, and Blood Institute-sponsored North American database, provides a platform to understand this emerging population. METHODS: Between September 2012 and September 2016, patients aged younger than 19 years who underwent VAD implantation were enrolled in Pedimacs...
July 4, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28939118/dry-eye-disease-in-the-elderly-in-a-french-population-based-study-the-montrachet-study-maculopathy-optic-nerve-nutrition-neurovascular-and-heart-diseases-prevalence-and-associated-factors
#11
Arthur Ferrero, Seydou Alassane, Christine Binquet, Lionel Bretillon, Niyazi Acar, Louis Arnould, Aurore Muselier-Mathieu, Cécile Delcourt, Alain M Bron, Catherine Creuzot-Garcher
PURPOSE: To estimate the prevalence of dry eye disease (DED) in the elderly and to describe systemic and ocular factors associated with DED in a population-based study, the Montrachet (Maculopathy Optic Nerve nuTRition neurovAsCular and HEarT diseases) study. METHODS: Dry eye symptoms were evaluated using the Ocular Surface Disease Index (OSDI) questionnaire. A self-reported history of dry eye symptoms and artificial tear use were also recorded. Every participant underwent an ophthalmic evaluation, which included the Schirmer test without anesthesia (Schirmer I), tear film breakup time (TFBUT) measurement, and fluorescein corneal staining evaluation...
September 19, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28930049/experience-with-the-syncardia-total-artificial-heart-in-a-canadian-centre
#12
Anthony Nguyen, Michel Pellerin, Louis P Perrault, Michel White, Anique Ducharme, Normand Racine, Michel Carrier
BACKGROUND: The SynCardia total artificial heart (TAH) provides complete circulatory support by replacing both native ventricles. Accepted indications include bridge to transplantation and destination therapy. We review our experience with TAH implantation during a period when axial flow pump became available. METHODS: We retrospectively analyzed the demographics, clinical characteristics and survival of all patients receiving the TAH. RESULTS: From September 2004 to November 2016, 13 patients (12 men, mean age 45 ± 13 yr) received the TAH for refractory cardiogenic shock secondary to idiopathic (56%) or ischemic (17%) cardiomyopathy and to other various causes (33%)...
October 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
https://www.readbyqxmd.com/read/28888521/impact-of-center-left-ventricular-assist%C3%A2-device-volume-on-outcomes%C3%A2-after%C3%A2-implantation-an-intermacs-analysis
#13
Jennifer A Cowger, John M Stulak, Palak Shah, Todd F Dardas, Francis D Pagani, Shannon M Dunlay, Simon Maltais, Keith D Aaronson, Ramesh Singh, Nahush A Mokadam, James K Kirklin, Christopher T Salerno
OBJECTIVES: This study examined patient outcomes after left ventricular assist device (LVAD) implantation across a range of center surgical volumes. BACKGROUND: In order for a center to qualify for reimbursement, Centers for Medicare and Medicaid Services (CMS) requires it to implant ≥10 LVADs or total artificial hearts over a 3-year period. The impact of center LVAD surgical volumes on patient outcomes has not been thoroughly scrutinized. METHODS: Center volumes were provided for 7,416 patients undergoing LVAD implantation who were enrolled in INTERMACS (Interagency Registry for Mechanically Assisted Circulatory Support)...
October 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28878878/successful-treatment-of-aortic-root-dissection-complicated-with-extensive-myocardial-infarction-using-the-total-artificial-heart
#14
Tamer Attia, Michael Robich, A Michael Lincoff, Mehdi H Shishehbor, Lars Svensson, Nicholas G Smedira
Acute Type A aortic dissection is a surgical emergency. Urgent repair is indicated to avoid complications such as acute aortic insufficiency, coronary ischemia and aortic rupture with cardiac tamponade. This report details the management of a patient with acute Type A aortic dissection complicated by an extensive anterolateral myocardial infarction and cardiogenic shock who was successfully bridged to transplantation with a total artificial heart.
August 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28862717/an-original-valveless-artificial-heart-providing-pulsatile-flow-tested-in-mock-circulatory-loops
#15
Piergiorgio Tozzi, Audrey Maertens, Jonathan Emery, Samuel Joseph, Matthias Kirsch, François Avellan
PURPOSE: We present the test bench results of a valveless total artificial heart that is potentially compatible with the pediatric population. METHODS: The RollingHeart is a valveless volumetric pump generating pulsatile flow. It consists of a single spherical cavity divided into 4 chambers by 2 rotating disks. The combined rotations of both disks produce changes in the volumes of the 4 cavities (suction and ejection). The blood enters/exits the spherical cavity through 4 openings that are symmetrical to the fixed rotation axis of the first disk...
August 11, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28841580/durable-biventricular-support-using-right-atrial-placement-of-the-heartware-hvad
#16
Hao A Tran, Travis L Pollema, Jorge Silva Enciso, Barry H Greenberg, Denise D Barnard, Eric D Adler, Victor G Pretorius
Patients with Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) levels 1-2 who either have or are at risk for right ventricular failure face significant morbidity and mortality after continuous flow left ventricular assist device (CF-LVAD) implantation. Currently, the options for biventricular support are limited the Total Artificial Heart (TAH; CardioWest, Syncardia, Tuscon, AZ) or biventricular assist device (BiVAD), which uses bulky extracorporeal or implantable displacement pumps...
August 23, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28799694/patient-with-a-total-artificial-heart-maintained-on-outpatient-dialysis-while-listed-for-combined-organ-transplant-a-single-center-experience
#17
Ramy M Hanna, Huma Hasnain, Mohammad Kamgar, Mina Hanna, Raffi Minasian, James Wilson
Advanced mechanical circulatory support is increasingly being used with more sophisticated devices that can deliver pulsatile rather than continuous flow. These devices are more portable as well, allowing patients to await cardiac transplantation in an outpatient setting. It is known that patients with renal failure are at increased risk for developing worsening acute kidney injury during implantation of a ventricular assist device (VAD) or more advanced modalities like a total artificial heart (TAH). Dealing with patients who have an implanted TAH who develop renal failure has been a challenge with the majority of such patients having to await a combined cardiac and renal transplant prior to transition to outpatient care...
October 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28761992/novel-technique-for-airless-connection-of-artificial-heart-to-vascular-conduits
#18
Jamshid H Karimov, Shengqiang Gao, Raymond Dessoffy, Gengo Sunagawa, Martin Sinkewich, Patrick Grady, Shiva Sale, Nader Moazami, Kiyotaka Fukamachi
Successful implantation of a total artificial heart relies on multiple standardized procedures, primarily the resection of the native heart, and exacting preparation of the atrial and vascular conduits for pump implant and activation. Achieving secure pump connections to inflow/outflow conduits is critical to a successful outcome. During the connection process, however, air may be introduced into the circulation, traveling to the brain and multiple organs. Such air emboli block blood flow to these areas and are detrimental to long-term survival...
December 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28742532/pulmonary-pressure-assessment-with-the-total-artificial-heart
#19
David L Joyce, Margaret M Redfield, Sudhir S Kushwaha, Atta Behfar, Barry A Borlaug, Richard C Daly, Gurpreet S Sandhu, Lyle D Joyce
Reversal of pulmonary hypertension has been observed in patients during a bridge to transplant with a left ventricular assist device. Total artificial heart (TAH) implant prevents subsequent right heart catheterization. Consequently, controversy exists over whether the prosthetic right ventricle improves or exacerbates pulmonary hypertension. A pulmonary artery (PA) pressure monitor was placed in two patients undergoing TAH implant, as a bridge to transplant. One patient had pulmonary hypertension at implant; the other had normal pulmonary pressures...
July 24, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28734790/organ-weights-and-histopathology-of-double-crested-cormorants-phalacrocorax-auritus-dosed-orally-or-dermally-with-artificially-weathered-mississippi-canyon-252-crude-oil
#20
Kendal E Harr, Drury R Reavill, Steven J Bursian, Dave Cacela, Fred L Cunningham, Karen M Dean, Brian S Dorr, Katie C Hanson-Dorr, Kate Healy, Katherine Horak, Jane E Link, Susan Shriner, Robert E Schmidt
A series of toxicity tests were conducted to assess the effects of low to moderate exposure to artificially weathered Deepwater Horizon Mississippi Canyon 252 crude oil on representative avian species as part of the Natural Resource Damage Assessment. The present report summarizes effects of oral exposure (n=26) of double-crested cormorants (DCCO; Phalacrocorax auritus) to 5 or 10ml oil kg(-1) day(-1) for up to 21 days or dermal application (n=25) of 13ml oil to breast and back feathers every three days totaling 6 applications in 21 days on organ weights and histopathology...
December 2017: Ecotoxicology and Environmental Safety
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