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https://www.readbyqxmd.com/read/28715322/optimal-mixed-tracking-impedance-control-with-application-to-transfemoral-prostheses-with-energy-regeneration
#1
Gholamreza Khademi, Hanieh Mohammadi, Hanz Richter, Dan Simon
OBJECTIVE: We design an optimal passivity-based tracking / impedance control system for a robotic manipulator with energy regenerative electronics, where the manipulator has both actively and semi-actively controlled joints. The semi-active joints are driven by a regenerative actuator that includes an energy-storing element. METHOD: External forces can have a large influence on energy regeneration characteristics. Impedance control is used to impose a desired relationship between external forces and deviation from reference trajectories...
July 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28712578/outcomes-readmissions-and-costs-in-transfemoral-and-alterative-access-transcatheter-aortic-valve-replacement-in-the-us-medicare-population
#2
Fenton H McCarthy, Danielle D Spragan, Danielle Savino, Taylor Dibble, Ashley C Hoedt, Katherine M McDermott, Joseph E Bavaria, Howard C Herrmann, Saif Anwaruddin, Jay Giri, Wilson Y Szeto, Peter W Groeneveld, Nimesh D Desai
OBJECTIVE: To comprehensively evaluate and compare utilization, outcomes, and especially costs of transfemoral (TF), transapical (TA), and transaortic (TAO) transcatheter aortic valve replacement (TAVR). METHODS: All Medicare fee-for-service patients undergoing TF (n = 4065), TA (n = 691), or TAO (n = 274) TAVR between January 1, 2011, and November 30, 2012, were identified using Health Care Procedure Classification Codes present on Medicare claims. Hospital charges from Medicare claims were converted to costs using hospital-specific Medicare cost-to-charge ratios...
June 16, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28711652/dual-task-walking-over-a-compliant-foam-surface-a-comparison-of-people-with-transfemoral-amputation-and-controls
#3
Sara J Morgan, Brian J Hafner, Valerie E Kelly
People with lower limb amputation are unable to reliably sense ground characteristics due to compromised sensory inputs from the missing limb. As a result, they may rely on compensatory strategies, such as use of cognitive resources, when walking over complex surfaces. This study examined interactions between cognition and walking over a compliant surface in 14 people with transfemoral amputation (TFA) and 14 controls using a dual-task paradigm. Walking was assessed with quantitative motion analysis in both single-task (walking alone) and dual-task (walking while performing a cognitive task) conditions over a compliant foam surface...
July 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28706126/transfemoral-transcatheter-aortic-valve-in-valve-implantation-for-aortic-valve-bioprosthesis-failure-with-the-fully-repositionable-and-retrievable-lotus-valve-a-single-center-experience
#4
Neil Ruparelia, Katharine Thomas, James D Newton, Kate Grebenik, Amar Keiralla, George Krasopoulos, Rana Sayeed, Adrian P Banning, Rajesh K Kharbanda
OBJECTIVE: To report a first case series of the Lotus valve (Boston Scientific) for the treatment of surgical aortic bioprosthesis failure. BACKGROUND: Valve-in-valve (VIV) transcatheter aortic valve implantation (TAVI) is an established management option for surgical aortic bioprosthesis failure. Although TAVI has proven efficacious, complications relating to suboptimal valve implantation have been reported in approximately 5% of patients. The Lotus valve is fully repositionable and retrievable, and therefore enables complete assessment of valve function prior to definitive deployment...
July 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28705072/short-and-long-term-results-after-endovascular-management-of-vascular-complications-during-transfemoral-aortic-valve-implantation
#5
Thomas Heger, Stefanie Strauß, Erwin Blessing, Martin Andrassy, Christian Erbel, Oliver J Müller, Emmanuel Chorianopoulos, Sven Pleger, Florian Leuschner, Grigorios Korosoglou, Raffi Bekeredjian, Hugo A Katus, Britta Vogel
Background Vascular injury and access site complications in the contemporary setting of transcatheter aortic valve implantation (TAVI) are known to be associated with increased mortality and morbidity. The aim of our study was to analyse the feasibility and safety of percutaneous treatment of such vascular complications using a stent graft. Methods Between January 2010 and April 2013, 36 TAVI patients developed severe access site complications and underwent subsequent interventional treatment with a covered stent...
July 14, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28702121/occurrence-of-femoral-nerve-injury-among-patients-undergoing-transfemoral-percutaneous-catheterization-procedures-in-the-united-states
#6
Mohammad El-Ghanem, Ahmed A Malik, Andre Azzam, Hussam A Yacoub, Adnan I Qureshi, Nizar Souayah
BACKGROUND: The proximity of the femoral nerve to the femoral artery renders it vulnerable to injury during transfemoral percutaneous catheterization (TPC) procedures. OBJECTIVE: To determine the incidence of femoral nerve injury in patients undergoing cardiac catheterization in a nationally representative inpatient database. METHODS: We analyzed data released annually from the Nationwide Inpatient Sample. We pooled data from 2002 to 2010 and, using the ICD-9-CM procedure codes, identified patients who underwent TPC...
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28702112/patient-preference-for-transradial-access-over-transfemoral-access-for-cerebrovascular-procedures
#7
Sudhakar R Satti, Ansar Z Vance, Sohil N Golwala, Tim Eden
PURPOSE: Shared decision-making, when physicians and patients collaborate and agree on health care decisions, is a key tenant of patient-centered care. Choice of access site for neurovascular procedures is rarely a shared decision point between physicians and patients. We present our initial evaluation of patient preference for radial over femoral access for cerebrovascular procedures. MATERIALS AND METHODS: IRB approved single-center, prospective, and consecutive survey of all patients undergoing transradial access for cerebrovascular imaging and intervention...
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28698995/transradial-versus-transfemoral-approach-in-patients-undergoing-primary-percutaneous-coronary-intervention-for-st-elevation-acute-myocardial-infarction-insight-from-the-credo-kyoto-ami-registry
#8
Yugo Yamashita, Hiroki Shiomi, Takeshi Morimoto, Hidenori Yaku, Shuichiro Kaji, Yutaka Furukawa, Yoshihisa Nakagawa, Kenji Ando, Kazushige Kadota, Mitsuru Abe, Masaharu Akao, Kazuya Nagao, Satoshi Shizuta, Koh Ono, Takeshi Kimura
Recent randomized clinical trials demonstrated that transradial approach was a preferred approach for primary percutaneous coronary intervention (PCI) in ST-elevation acute myocardial infarction (STEMI). However, clinical outcomes of transradial approach in STEMI have not been adequately evaluated yet in the real-world practice, which includes hemodynamically unstable high-risk patients. We identified 3662 STEMI patients who had primary PCI within 24 h after symptom onset and were treated by transradial (N = 471) or transfemoral (N = 3191) approach in the CREDO-Kyoto AMI registry...
July 11, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28691574/enhancement-of-a-prosthetic-knee-with-a-microprocessor-controlled-gait-phase-switch-reduces-falls-and-improves-balance-confidence-and-gait-speed-in-community-ambulators-with-unilateral-transfemoral-amputation
#9
Sara Agueda Fuenzalida Squella, Andreas Kannenberg, Ângelo Brandão Benetti
BACKGROUND: Despite the evidence for improved safety and function of microprocessor stance and swing-controlled prosthetic knees, non-microprocessor-controlled prosthetic knees are still standard of care for persons with transfemoral amputations in most countries. Limited feature microprocessor-control enhancement of such knees could stand to significantly improve patient outcomes. OBJECTIVES: To evaluate gait speed, balance, and fall reduction benefits of the new 3E80 default stance hydraulic knee compared to standard non-microprocessor-controlled prosthetic knees...
July 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28690943/transradial-vs-transfemoral-approach-in-cardiac-catheterization-a-literature-review
#10
REVIEW
Ibrar Anjum, Muhammad Adnan Khan, Muhammad Aadil, Aniqa Faraz, Mudassir Farooqui, Amerah Hashmi
The main objective of this review paper is to study the comparison between transradial and transfemoral approach in catheterization. Transradial and transfemoral are two main approaches which are used as a diagnostic and therapeutic purpose in catheterization. The transradial approach in interventional cardiology is safe, effective, and feasible as compared to the transfemoral approach. The aim of this study is to compare pros and cons of transradial vs. transfemoral approach in catheterization. We conducted this systematic review on the role of transradial vs...
June 3, 2017: Curēus
https://www.readbyqxmd.com/read/28689951/spot-stenting-of-supra-aortic-branch-vessels-for-residual-type-a-dissection
#11
Ciro Ferrer, Raffaele Grande, Luigi Venturini, Valerio Scarano Catanzaro, Gabriele Maritati, Luca di Marzo
of this report is to describe the exclusion of the false lumen in a residual type A aortic dissection (TAAD) by the deployment of two covered stents: one in the right common carotid artery (RCCA) and one in the left subclavian artery (LSA). A 77-year-old female, already treated with ascending aorta replacement for acute TAAD, was referred to our center for a 97-mm post-dissection arch aneurysm. A computed tomography angiography (CTA) showed false lumen patency by reperfusion from secondary tears located at level of RCCA and LSA...
July 6, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28689947/a-novel-iliac-morphology-score-predicts-procedural-mortality-and-major-vascular-complications-in-transfemoral-aortic-valve-replacement
#12
Juliet Blakeslee-Carter, David Dexter, Paul Mahoney, Sadie Ahanchi, Samuel Steerman, Sebastian Larion, Brandon Cain, Jean Panneton
OBJECTIVES: Vascular complications remain a significant technical challenge for transfemoral TAVR (Transcatheter Aortic Valve Replacement). The goal of this study was to develop a pre-operative tool for prediction of major vascular complications of TAVR. METHODS: A retrospective review was performed of all patients who underwent transfemoral TAVR at a tertiary medical center from 2011-2015. Iliofemoral arterial measurements were obtained with CTA 3D reconstructions images and an Iliac Morphology Score (IMS) was created from these measurements...
July 6, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28689936/results-of-one-stage-or-staged-amputations-of-lower-limbs-consequent-to-critical-limb-ischemia-and-infection
#13
Leandro Ramos Silva, Giordano Masini Fernandes, Natacha Ueda Morales, Marcone Lima Sobreira, Regina Moura, Matheus Bertanha, Winston Bonetti Yoshida
BACKGROUND: Amputations of lower limbs can be conducted as one-stage (OSA) or staged procedures (SA). OBJECTIVE: To analyze technical success and mortality rates of both techniques, as well as factors that might influence outcomes in patients with critical limb ischemia (CLI). METHODS: Retrospective study of 185 consecutive patients with CLI who underwent amputations in the period 2004-2011. Primary endpoints were rates of technical success (healing without dehiscence or reintervention), and mortality...
July 6, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28683542/feasibility-and-applicability-of-static-vascular-outline-roadmapping-during-tavi
#14
Navid Madershahian, Carolyn Weber, Payman Majd, Tanja Rudolph, Elmar Kuhn, Maximilian Scherner, Yeong-Hoon Choi, Kaveh Eghbalzadeh, Volker Rudolph, Cherif Sahyoun, Thorsten Wahlers
BACKGROUND: We investigated the application and feasibility of a novel software tool designed for the visualization of the aortic root during transcatheter aortic valve implantation (TAVI). The final positioning of the device prior deployment remains the most critical phase during TAVI. METHODS: Philips "Vascular Outlining" prototype application was used during balloon expandable Edwards Lifesciences SapienXT valve deployment. It processes any angiographic sequences, extracting the static outline of vessels and projecting the two- dimensional vessel margins as a roadmap on live fluoroscopy...
July 5, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28683504/initial-experience-with-the-transapical-access-for-tevar
#15
Andreas H Mahnken, Marc Irqsusi, Walter Hundt, Rainer G Moosdorf
Background The endovascular approach has become a mainstay in the treatment of aortic aneurysms. While the transfemoral approach is most commonly used, it is often inaccessible due to a vascular pathology, such as occlusion, tortuosity or heavy calcifications. The transapical access provides an alternative approach. The goal of this study is to report the feasibility of the transapical approach for total endovascular repair of thoracic aortic aneurysms (TEVAR). Methods Three patients with thoracic aortic aneurysms with inaccessible femoral arteries underwent TEVAR via the transapical approach...
August 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28674621/predicting-hospitalisation-duration-after-transcatheter-aortic-valve-implantation
#16
Martijn S van Mourik, Leonie M E Geenen, Ronak Delewi, Esther M A Wiegerinck, Karel T Koch, Berto J Bouma, Jose P Henriques, Robbert J de Winter, Jan Baan, M Marije Vis
OBJECTIVE: Transcatheter aortic valve implantation (TAVI) is widely used as an alternative to conventional surgical aortic valve replacement. The aim of this study was to identify preprocedural predictors of duration of length of stay (LoS) after transfemoral TAVI (TF-TAVI). METHODS: We included all consecutive patients who underwent TF-TAVI at our centre between November 2010 and June 2013. Preprocedural, periprocedural and postprocedural variables were collected and evaluated to LoS...
2017: Open Heart
https://www.readbyqxmd.com/read/28669697/transfemoral-lotus-valve-implantation-for-treatment-of-postendocarditis-stentless-prosthesis-degeneration-with-pure-aortic-regurgitation
#17
Marco B Ancona, Francesco Giannini, Antonio Mangieri, Damiano Regazzoli, Vittorio Romano, Manuela Giglio, Azeem Latib, Antonio Colombo, Matteo Montorfano
No abstract text is available yet for this article.
May 11, 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28664579/vascular-access-site-complication-in-transfemoral-coronary-angiography-between-uninterrupted-warfarin-and-heparin-bridging
#18
Wanwarang Wongcharoen, Kittipong Pinyosamosorn, Siriluck Gunaparn, Suchada Boonnayhun, Tasalak Thonghong, Pannipa Suwannasom, Arintaya Phrommintikul
BACKGROUND: Warfarin discontinuation with heparin bridging is a common practice in patients receiving warfarin prior to elective coronary angiography (CAG). The uninterrupted warfarin strategy has been suggested to be alternative option for patients with high thromboembolic risk. Therefore, we aimed to assess the safety of elective transfemoral CAG during uninterrupted warfarin therapy compared to heparin bridging. METHODS: This study was a randomized open-label design with blinded event evaluation...
June 29, 2017: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/28662806/temporal-trends-in-transcatheter-aortic%C3%A2-valve-replacement-in-france-france-2-to-france-tavi
#19
Vincent Auffret, Thierry Lefevre, Eric Van Belle, Hélène Eltchaninoff, Bernard Iung, René Koning, Pascal Motreff, Pascal Leprince, Jean Philippe Verhoye, Thibaut Manigold, Geraud Souteyrand, Dominique Boulmier, Patrick Joly, Frédéric Pinaud, Dominique Himbert, Jean Philippe Collet, Gilles Rioufol, Said Ghostine, Olivier Bar, Alain Dibie, Didier Champagnac, Lionel Leroux, Frédéric Collet, Emmanuel Teiger, Olivier Darremont, Thierry Folliguet, Florence Leclercq, Thibault Lhermusier, Patrick Olhmann, Bruno Huret, Luc Lorgis, Laurent Drogoul, Bernard Bertrand, Christian Spaulding, Laurent Quilliet, Thomas Cuisset, Maxence Delomez, Farzin Beygui, Jean-Philippe Claudel, Alain Hepp, Arnaud Jegou, Antoine Gommeaux, Anfani Mirode, Luc Christiaens, Charles Christophe, Claude Cassat, Damien Metz, Lionel Mangin, Karl Isaaz, Laurent Jacquemin, Philippe Guyon, Christophe Pouillot, Serge Makowski, Vincent Bataille, Josep Rodés-Cabau, Martine Gilard, Hervé Le Breton
BACKGROUND: Transcatheter aortic valve replacement (TAVR) is standard therapy for patients with severe aortic stenosis who are at high surgical risk. However, national data regarding procedural characteristics and clinical outcomes over time are limited. OBJECTIVES: The aim of this study was to assess nationwide performance trends and clinical outcomes of TAVR during a 6-year period. METHODS: TAVRs performed in 48 centers across France between January 2013 and December 2015 were prospectively included in the FRANCE TAVI (French Transcatheter Aortic Valve Implantation) registry...
July 4, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28662805/procedural-experience-for-transcatheter-aortic-valve-replacement-and-relation%C3%A2-to%C3%A2-outcomes-the-sts-acc-tvt-registry
#20
John D Carroll, Sreekanth Vemulapalli, Dadi Dai, Roland Matsouaka, Eugene Blackstone, Fred Edwards, Frederick A Masoudi, Michael Mack, Eric D Peterson, David Holmes, John S Rumsfeld, E Murat Tuzcu, Frederick Grover
BACKGROUND: Transcatheter aortic valve replacement (TAVR) has been introduced into U.S. clinical practice with efforts to optimize outcomes and minimize the learning curve. OBJECTIVES: The goal of this study was to assess the degree to which increasing experience during the introduction of this procedure, separated from other outcome determinants including patient and procedural characteristics, is associated with outcomes. METHODS: The authors evaluated the association of hospital TAVR volume and patient outcomes for TAVR by using data from 42,988 commercial procedures conducted at 395 hospitals submitting to the Transcatheter Valve Therapy Registry from 2011 through 2015...
July 4, 2017: Journal of the American College of Cardiology
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