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Total artificial heart

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https://www.readbyqxmd.com/read/27918616/nitric-oxide-donors-for-cervical-ripening-and-induction-of-labour
#1
REVIEW
Arpita Ghosh, Katherine R Lattey, Anthony J Kelly
BACKGROUND: Sometimes it is necessary to bring on labour artificially because of safety concerns for the mother or baby. This review is one of a series of reviews of methods of labour induction using a standardised protocol. OBJECTIVES: To determine the effects of NO donors (isosorbide mononitrate (ISMN), isosorbide dinitrate (ISDN), nitroglycerin and sodium nitroprusside) for third trimester cervical ripening or induction of labour, in comparison with placebo or no treatment or other treatments from a predefined hierarchy...
December 5, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27895342/innovations-in-cardiovascular-care-historical-perspective-contemporary-practice-recent-trends-and-future-directions
#2
Hasanat Sharif, Mayera Tufail
Cardiovascular diseases continue to be a major cause of mortality and morbidity in the world population. First open heart procedure was performed by Gibbon in 1953, since then many advancements have been introduced to the field of cardiac surgery. Minimally invasive techniques were introduced, which include minimally invasive coronary artery bypass grafting (CABG), off-pump technique, minimally invasive valve surgery or transcatheter techniques to implant stentless or sutureless valves. The hybrid strategy to address coronary disease combines catheterisation procedures with standard surgical techniques...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27878837/thrombotic-depositions-on-right-impeller-of-double-ended-centrifugal-total-artificial-heart-in-vivo
#3
Jamshid H Karimov, David J Horvath, Shinji Okano, Mark Goodin, Gengo Sunagawa, Nicole Byram, Nader Moazami, Leonard A R Golding, Kiyotaka Fukamachi
The development of total artificial heart devices is a complex undertaking that includes chronic biocompatibility assessment of the device. It is considered particularly important to assess whether device design and features can be compatible long term in a biological environment. As part of the development program for the Cleveland Clinic continuous-flow total artificial heart (CFTAH), we evaluated the device for signs of thrombosis and biological material deposition in four animals that had achieved the intended 14-, 30-, or 90-day durations in each respective experiment...
November 23, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27862058/translation-of-first-north-american-50-and-70-cc-total-artificial-heart-virtual-and-clinical-implantations-utility-of-3d-computed-tomography-to-test-fit-devices
#4
Alice S Ferng, Isabel Oliva, Clinton Jokerst, Ryan Avery, Alana M Connell, Phat L Tran, Richard G Smith, Zain Khalpey
Since the creation of SynCardia's 50 cc Total Artificial Hearts (TAHs), patients with irreversible biventricular failure now have two sizing options. Herein, a case series of three patients who have undergone successful 50 and 70 cc TAH implantation with complete closure of the chest cavity utilizing preoperative "virtual implantation" of different sized devices for surgical planning are presented. Computed tomography (CT) images were used for preoperative planning prior to TAH implantation. Three-dimensional (3D) reconstructions of preoperative chest CT images were generated and both 50 and 70 cc TAHs were virtually implanted into patients' thoracic cavities...
November 10, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27859378/mechanical-circulatory-support-devices-for-pediatric-patients-with-congenital-heart-disease
#5
REVIEW
Steven G Chopski, William B Moskowitz, Randy M Stevens, Amy L Throckmorton
The use of mechanical circulatory support (MCS) devices is a viable therapeutic treatment option for patients with congestive heart failure. Ventricular assist devices, cavopulmonary assist devices, and total artificial heart pumps continue to gain acceptance as viable treatment strategies for both adults and pediatric patients as bridge-to-transplant, bridge-to-recovery, and longer-term circulatory support alternatives. We present a review of the current and future MCS devices for patients having congenital heart disease (CHD) with biventricular or univentricular circulations...
November 8, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27851258/1623-common-hurdles-in-the-postoperative-management-of-a-patient-with-a-total-artificial-heart
#6
Marissa Mery, Siavosh Saatee, Sonia Nhieu
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27803495/total-artificial-heart-implantation-after-undifferentiated-high-grade-sarcoma-excision
#7
Jamila Kremer, Mina Farag, Rawa Arif, Andreas Brcic, Anton Sabashnikov, Bastian Schmack, Aron-Frederik Popov, Matthias Karck, Pascal M Dohmen, Arjang Ruhparwar, Alexander Weymann
BACKGROUND Total artificial heart (TAH) implantation in patients with aggressive tumor infiltration of the heart can be challenging. CASE REPORT We report on a patient with a rare primary undifferentiated high-grade spindle cell sarcoma of the mitral valve and in the left atrium, first diagnosed in 2014. The referring center did a first resection in 2014. In the course of 17 months, computer tomography (CT) scan again showed massive invasion of the mitral valve and left atrium. Partial resection and mitral valve replacement was not an option...
November 2, 2016: Medical Science Monitor Basic Research
https://www.readbyqxmd.com/read/27801302/total-artificial-heart-implantation-blood-pressure-management-as-resolving-treatment-for-massive-hemolysis-following-total-artificial-heart-implantation
#8
Ali Ghodsizad, Michael M Koerner, A El-Banayosy, Mohamed Zeriouh, Arjang Ruhparwar, Matthias Loebe
The SynCardia Total Artificial Heart (TAH) has been used for patients with biventricular failure, who cannot be managed with implantation of a left ventricular (LV) assist device. Following TAH implantation, our patient developed severe hemolysis, which could only be managed successfully by aggressive blood pressure control [Ohashi 2003; Nakata 1998].
October 21, 2016: Heart Surgery Forum
https://www.readbyqxmd.com/read/27773456/clinical-hemodynamic-evaluation-of-patients-implanted-with-a-fully-magnetically-levitated-left-ventricular-assist-device-heartmate-3
#9
Nir Uriel, Sirtaz Adatya, Jiří Malý, Eric Kruse, Daniel Rodgers, Gerald Heatley, Aleš Herman, Poornima Sood, Dominik Berliner, Johann Bauersachs, Axel Haverich, Michael Želízko, Jan D Schmitto, Ivan Netuka
BACKGROUND: The HeartMate 3 (HM3) is a Conformiteé Européenne (CE) mark-approved left ventricular assist device (LVAD) with a fully magnetically levitated rotor with features consisting of a wide range of operational speeds, wide flow paths and an artificial pulse. We performed a hemodynamic and echocardiographic evaluation of patients implanted with the HM3 LVAD to assess the speed range for optimal hemodynamic support. METHODS: Sixteen HM3 patients underwent pump speed ramp tests with right heart catheterization (including central venous pressure [CVP], pulmonary artery pressure, pulmonary capillary wedge pressure [PCWP] and blood pressure [BP]) and 3-dimensional echocardiography (3DE)...
July 17, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27768204/in-vitro-performance-investigation-of-syncardia%C3%A2-freedom%C3%A2-driver-via-patient-simulator-mock-loop
#10
Riccardo Toninato, Silvia Scuri, Vincenzo Tarzia, Gino Gerosa, Francesca M Susin
PURPOSE: The gold standard therapy for patients with advanced heart failure is heart transplant. The gap between donors and patients in waiting lists promoted the development of circulatory support devices, such as the total artificial heart (TAH). Focusing on in vitro tests performed with CardioWest™ TAH (CW) driven by the SynCardia Freedom® portable driver (FD) the present study goals are: i) prove the reliability of a hydraulic circuit used as patient simulator to replicate a quasi-physiological scenario for various hydrodynamic conditions, ii) investigate the hydrodynamic performance of the CW FD, iii) help clinicians in possible interpretation of clinical cases outcomes...
November 29, 2016: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/27762510/long-term-mortality-in-patients-with-permanent-pacemaker-implantation
#11
Abraham Speedie, Cinosh Mathew, Ramgopal S Shahi, Rajneesh Calton
INTRODUCTION: The development of implantable technology for cardiac rhythm management remains one of the seminal achievements of the second half of the 20th century. The development of artificial pacemakers for the electrical control of the cardiac rhythm has greatly enhanced the physician's ability to treat cardiac dysrhythmias. An ageing population and the extension of indications will in all probability result in an increasing number of cardiac device implantations. OBJECTIVE OF STUDY: To study mortality and morbidity in patients with permanent pacemaker implantation at a tertiary care hospital in North India...
September 2016: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/27734563/heart-rate-informed-artificial-pancreas-system-enhances-glycemic-control-during-exercise-in-adolescents-with-t1d
#12
Mark D DeBoer, Daniel R Cherñavvsky, Katarina Topchyan, Boris P Kovatchev, Gary L Francis, Marc D Breton
OBJECTIVE: To evaluate the safety and performance of using a heart rate (HR) monitor to inform an artificial pancreas (AP) system during exercise among adolescents with type 1 diabetes (T1D). MATERIALS AND METHODS: In a randomized, cross-over trial, adolescents with T1D age 13 - 18 years were enrolled to receive on separate days either the unmodified UVa AP (stdAP) or an AP system connected to a portable HR monitor (AP-HR) that triggered an exercise algorithm for blood glucose (BG) control...
October 13, 2016: Pediatric Diabetes
https://www.readbyqxmd.com/read/27645393/rapid-speed-modulation-of-a-rotary-total-artificial-heart-impeller
#13
Matthias Kleinheyer, Daniel L Timms, Geoffrey D Tansley, Frank Nestler, Nicholas A Greatrex, O Howard Frazier, William E Cohn
Unlike the earlier reciprocating volume displacement-type pumps, rotary blood pumps (RBPs) typically operate at a constant rotational speed and produce continuous outflow. When RBP technology is used in constructing a total artificial heart (TAH), the pressure waveform that the TAH produces is flat, without the rise and fall associated with a normal arterial pulse. Several studies have suggested that pulseless circulation may impair microcirculatory perfusion and the autoregulatory response and may contribute to adverse events such as gastrointestinal bleeding, arteriovenous malformations, and pump thrombosis...
September 2016: Artificial Organs
https://www.readbyqxmd.com/read/27624221/previous-challenges-and-current-progress-the-use-of-total-artificial-hearts-in-patients-with-end-stage-heart-failure
#14
Corbin E Goerlich, O H Frazier, William E Cohn
No abstract text is available yet for this article.
October 2016: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/27619734/heart-failure-therapies-new-strategies-for-old-treatments-and-new-treatments-for-old-strategies
#15
REVIEW
Marc K Halushka, Richard N Mitchell, Robert F Padera
Heart failure, whether acute or chronic, remains a major health care crisis affecting almost 6 million Americans and over 23 million people worldwide. Roughly half of those affected will die within 5 years, and the annual cost exceeds $30 billion in the US alone. Although medical therapy has made some modest inroads in partially stemming the heart failure tsunami, there remains a significant population for whom medication is unsuccessful or has ceased being effective; such patients can benefit from heart transplantation or mechanical circulatory support...
November 2016: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/27582339/prototype-development-of-an-implantable-compliance-chamber-for-a-total-artificial-heart
#16
Stephanie Schmitz, Kristin Unthan, Marc Sedlaczek, Felix Wald, Thomas Finocchiaro, Sotirios Spiliopoulos, Reiner Koerfer, Ulrich Steinseifer
At our institute a total artificial heart is being developed. It is directly actuated by a linear drive in between two ventricles, which comprise membranes to separate the drive and blood flow. A compliance chamber (CC) is needed to reduce pressure peaks in the ventricles and to increase the pump capacity. Therefore, the movement of the membrane is supported by applying a negative pressure to the air volume inside the drive unit. This study presents the development of the implantable CC which is connected to the drive unit of the total artificial hearts (TAH)...
September 1, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27577028/total-artificial-heart-and-chronic-haemodialysis-a-possible-bridge-to-transplantation
#17
Julien Demiselle, Virginie Besson, Johnny Sayegh, Jean-François Subra, Jean-François Augusto
BACKGROUND: Total artificial heart (TAH) device is sometimes necessary to treat end stage heart failure (HF). After surgery, renal impairment can occur with the need of renal replacement therapy. METHOD: We report the case of a 51-year-old man who was treated with conventional hemodialysis (HD) while on support with TAH. RESULTS: The patient underwent HD while on TAH support during 14 months. He benefited from conventional HD, 6 sessions per week...
August 30, 2016: Blood Purification
https://www.readbyqxmd.com/read/27576213/transcranial-doppler-changes-in-patients-treated-with-extracorporeal-membrane-oxygenation
#18
Tapan Kavi, Megan Esch, Brenda Rinsky, Axel Rosengart, Shouri Lahiri, Patrick D Lyden
BACKGROUND: Transcranial Doppler (TCD) has significant implications for neurovascular assessment in patients being treated with venoarterial-extracorporeal membrane oxygenation (VA-ECMO). However, there have been no studies demonstrating the changes in pulsatility indices (PIs) seen in these patients. Nonpulsatile waveforms are seen during on-pump coronary artery bypass graft, but low or low-normal PIs have never been reported. It is important to be aware of these changes, as they can be misinterpreted as cerebral vasodilation, vasoconstriction, increased intracranial pressures (ICPs), or cerebral circulatory arrest...
August 26, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27573150/comparison-of-total-artificial-heart-and-biventricular-assist-device-support-as-bridge-to-transplantation
#19
Allen Cheng, Jaimin R Trivedi, Victor H Van Berkel, H Todd Massey, Mark S Slaughter
BACKGROUND: The use of left ventricular assist devices (LVAD) has increased significantly in the last decade. However, right heart dysfunction remains a problem despite the improved outcomes with continuous-flow LVADs. Surgical options for bridge to transplantation (BTT) in patients with biventricular failure are total artificial heart (TAH) or biventricular support (BiVAD). This study examines the differences in pre- and post-transplantation outcomes and survival in patients with TAH or BiVAD support as BTT...
October 2016: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/27543069/application-of-adaptive-starling-like-controller-to-total-artificial-heart-using-dual-rotary-blood-pumps
#20
Boon C Ng, Peter A Smith, Frank Nestler, Daniel Timms, William E Cohn, Einly Lim
The successful clinical applicability of rotary left ventricular assist devices (LVADs) has led to research interest in devising a total artificial heart (TAH) using two rotary blood pumps (RBPs). The major challenge when using two separately controlled LVADs for TAH support is the difficulty in maintaining the balance between pulmonary and systemic blood flows. In this study, a starling-like controller (SLC) hybridized with an adaptive mechanism was developed for a dual rotary LVAD TAH. The incorporation of the adaptive mechanism was intended not only to minimize the risk of pulmonary congestion and atrial suction but also to match cardiac demand...
August 19, 2016: Annals of Biomedical Engineering
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