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Prosthetic Valve

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https://www.readbyqxmd.com/read/29135480/mechanical-surface-area-of-prosthetic-heart-valve-adverse-clinical-impact-of-large-mechanical-valve-in-mitral-position
#1
Yang Hyun Cho, Kiick Sung, Wook Sung Kim, Jae-Hun Kim, Sung Mok Kim, Pyo Won Park
Although thromboembolic accidents are serious adverse events associated with mechanical mitral valves, there have been no studies on the clinical impact of the large mechanical surface areas (MSAs) of mechanical mitral prostheses. Between 1995 and 2010, 488 consecutive adult patients underwent isolated mechanical mitral valve replacement. We measured the MSA via three-dimensional computed tomography for each prosthesis. Mean patient age was 50.6 ± 11.1 years. The mean body surface area (BSA) and MSA index (MSAI, MSA/BSA) were 1...
November 8, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29134537/current-status-of-cardiovascular-surgery-in-japan-2013-and-2014-a-report-based-on-the-japan-cardiovascular-surgery-database-4-valvular-heart-surgery
#2
Kiyoharu Nakano, Norimichi Hirahara, Noboru Motomura, Hiroaki Miyata, Shinichi Takamoto
Data from the Japan cardiovascular surgery database from 2013 to 2014 were analyzed to demonstrate the mortality rate and choice of surgical procedures, especially concerning the selection of valve prosthesis for each valve position and patient age group, and the effects of preoperative complications on mortality and prosthetic valve selection. The proportion of each surgical procedure was compared for each patient age in the aortic, mitral, and tricuspid positions. The proportion of mechanical valve prostheses was 23...
November 13, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29129879/transcatheter-aortic-valve-implantation-for-degenerated-19-mm-aortic-bioprosthetic-valve
#3
Kizuku Yamashita, Tomoyuki Fujita, Satsuki Fukushima, Yusuke Shimahara, Yuta Kume, Yorihiko Matsumoto, Naonori Kawamoto, Tatsuro Hitsumoto, Nobuyasu Ito, Yasuhiro Hamatani, Atsushi Okada, Hiroyuki Takahama, Makoto Amaki, Takuya Hasegawa, Yasuo Sugano, Hideaki Kanzaki, Toshihisa Anzai, Satoshi Yasuda, Junjiro Kobayashi
BACKGROUND: The valve-in-valve procedure, in which a transcatheter heart valve (THV) is implanted over a prosthetic valve, has been shown to be safe and therapeutically effective, depending on the size of the replacement valve.Methods and Results:We report 3 cases of successful valve-in-valve procedure to replace a degenerated 19-mm stented prosthetic aortic valve. Balloon-expanding THVs were implanted: 20-mm in the 1st case and 23-mm in the next 2. Aortic stenosis was almost completely resolved in all patients, who recovered promptly and without cardiac adverse events...
November 11, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29128265/atrial-flutter-has-less-left-atrial-spontaneous-contrast-and-higher-left-atrial-appendage-emptying-velocity-compared-with-atrial-fibrillation
#4
Jennifer J Huang, Sridhar Reddy, Tam H Truong, Prakash Suryanarayana, Joseph S Alpert
BACKGROUND: The risk of stroke and thromboembolism in atrial fibrillation is established. There are clear guidelines in anticoagulation management of patient's with atrial fibrillation, however, the evidence surrounding the risk of thromboembolism in patients with atrial flutter is not as clear. We hypothesized that atrial flutter would have indicators of less risk for thromboembolism compared with atrial fibrillation on transesophageal echocardiography (TEE); thereby possibly leading to a lower stroke risk...
November 8, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/29122274/frequency-and-significance-of-intravascular-hemolysis-before-and-after-transcatheter-aortic-valve-implantation-in-patients-with-severe-aortic-stenosis
#5
Tsung-Yu Ko, Mao-Shin Lin, Lung-Chun Lin, Ying-Ju Liu, Chih-Fan Yeh, Ching-Chang Huang, Ying-Hsien Chen, Yih-Sharng Chen, Hsien-Li Kao
Intravascular hemolysis (IVH) has been identified in patients with surgical prosthetic valves, but few have been reported after transcatheter aortic valve implantation (TAVI). We conducted a prospective analysis of 64 TAVI patients. The hemolysis profiles were collected at baseline and 6 months after TAVI. The echocardiography was performed at baseline and 6 months after TAVI. There are 14 patients (21.9%) with IVH before and 24(37.5%) after TAVI. The serum haptoglobin values before and 6 months after TAVI are 126...
October 10, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29121980/a-complicated-prosthetic-valve-endocarditis-due-to-methicillin-resistant-staphylococci-treated-with-linezolid-and-ciprofloxacin-a-case-report
#6
C G K Amiyangoda, H Wimalaratna, S Bowatte
BACKGROUND: Prosthetic valve endocarditis (PVE) due to methicillin resistant Staphylococcus aureus (MRSA) is a rare disease with significant mortality and morbidity. With the emerging resistance and adverse effect profile of vancomycin which is the standard treatment, there is a compelling necessity of an effective alternative for vancomycin. Linezolid is proved as such an agent for infections caused by MRSA in other sites. However to-date the evidence for successful use of linezolid for MRSA prosthetic valve endocarditis is limited only for few case studies...
November 9, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29121720/incidence-predictors-and-outcomes-of-infective-endocarditis-in-a-contemporary-adult-congenital-heart-disease-population
#7
Benjamin Moore, Jacob Cao, Irina Kotchetkova, David S Celermajer
BACKGROUND: The prevalence of congenital heart disease (CHD) in the adult population is steadily increasing. A substrate of prosthetic material and residual lesions, constantly evolving as surgical techniques change over time, predispose these patients to the potentially devastating complication of infective endocarditis (IE). METHODS: We retrospectively reviewed 2935 patients in our adult CHD database for all cases of endocarditis between 1991 and 2016. Incidence, clinical course and predictors of outcomes were analysed...
December 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29119728/a-framework-for-designing-patient-specific-bioprosthetic-heart-valves-using-immersogeometric-fluid-structure-interaction-analysis
#8
Fei Xu, Simone Morganti, Rana Zakerzadeh, David Kamensky, Ferdinando Auricchio, Alessandro Reali, Thomas J R Hughes, Michael S Sacks, Ming-Chen Hsu
Numerous studies have suggested that medical image derived computational mechanics models could be developed to reduce mortality and morbidity due to cardiovascular diseases by allowing for patient-specific surgical planning and customized medical device design. In this work, we present a novel framework for designing prosthetic heart valves using a parametric design platform and immersogeometric fluid-structure interaction (FSI) analysis. We parameterize the leaflet geometry using several key design parameters...
November 9, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29118887/a-case-of-early-prosthetic-valve-endocarditis-caused-by-staphylococcus-warneri-in-a-patient-presenting-with-congestive-heart-failure
#9
Maita S Kuvhenguhwa, Kevin O Belgrave, Sonia U Shah, Arnold S Bayer, Loren G Miller
Staphylococcus warneri, a coagulase negative staphylococcus, has been isolated in prosthetic device-related infections and has been reported as a rare cause of endocarditis. We report a case of prosthetic aortic valve S. warneri endocarditis, in which the patient lacked typical infectious signs and symptoms, instead presenting with congestive heart failure due to perforation of the valve. Providers should consider endocarditis with a low virulence pathogen such as S. warneri when a patient with a prosthetic valve presents with heart failure, even in the absence of fever, leukocytosis and other infectious symptoms...
October 2017: Cardiology Research
https://www.readbyqxmd.com/read/29117501/mitral-valve-in-valve-ring-and-other-percutaneous-treatments-of-surgical-failures
#10
REVIEW
Mackram F Eleid
Re-do mitral valve surgery is associated with high morbidity and mortality. In recent years a variety of percutaneous repair techniques of surgical failures have emerged as safe and effective treatment options for several post-surgical problems including bioprosthetic mitral valve failure, prosthetic regurgitation or stenosis following annuloplasty, and periprosthetic regurgitation. This review will cover the indications, techniques and outcomes of these novel percutaneous therapies.
November 5, 2017: Progress in Cardiovascular Diseases
https://www.readbyqxmd.com/read/29107160/resumption-of-antithrombotic-agents-in-chronic-subdural-hematoma-csdh-a-systematic-review-and-meta-analysis
#11
Kevin Phan, David Abi-Hanna, Jack Kerferd, Victor M Lu, Adam A Dmytriw, Yam-Ting Ho, Jacob Fairhall, Rajesh Reddy, Peter Wilson
BACKGROUND: The clinical decision whether and when to resume antithrombotics in patients with chronic subdural hematomas (CSDH) postoperatively is limited by a lack of quality evidence exploring this topic. Our study aims to assess the available evidence of patient complication outcomes, specifically hemorrhagic and thromboembolic events, following the resumption or non-resumption of antithrombotic agents postoperatively in CSDH patients already on these agents before CSDH. METHODS: We followed recommended PRISMA guidelines for systematic reviews...
October 26, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29103604/incidence-predictors-and-mortality-of-infective-endocarditis-in-adults-with-congenital-heart-disease-without-prosthetic-valves
#12
Darren Mylotte, Dinela Rushani, Judith Therrien, Liming Guo, Aihua Liu, Kenneth Guo, Giuseppe Martucci, Andrew S Mackie, Jay S Kaufman, Ariane Marelli
Congenital heart disease (CHD) increases the risk of infective endocarditis (IE), though the lesion-specific risk and mortality are poorly defined. Using the population-based Quebec CHD database, we sought to describe the predictors of IE and to evaluate if IE was associated with mortality among adult CHD (ACHD) patients without prior valve replacement surgery. We extracted data on ACHD patients with IE and assessed the lesion-specific incidence of IE, risk factors for IE acquisition, and all-cause 1-year mortality...
October 14, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29102435/aortic-valve-prosthetic-endocarditis-remains-a-challenging-problem
#13
EDITORIAL
Andrew Cochrane
No abstract text is available yet for this article.
October 12, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29102206/morphologic-and-histologic-findings-in-bioprosthetic-valves-explanted-from-the-mitral-position-in-children-younger-than-5-years-of-age
#14
Laura Gellis, Christopher W Baird, Sitaram Emani, Michele Borisuk, Kimberlee Gauvreau, Robert F Padera, Stephen P Sanders
BACKGROUND: Mitral valve replacement (MVR) in very young children is challenging. This study investigates the mechanisms for early bioprosthetic valve failure in very young patients through review of the macroscopic and microscopic findings in explanted bioprosthetic valves. METHODS: Patients who underwent MVR with a bioprosthetic valve at Boston Children's Hospital between January 2010 to April 2016 at <5 years of age were the subjects of this study. Valve failure was defined as prosthetic mitral valve explantation with mitral valve re-replacement...
September 28, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29097247/emerging-group-c-and-g-streptococcal-endocarditis-a-canadian-perspective
#15
Sylvain A Lother, Davinder S Jassal, Philippe Lagacé-Wiens, Yoav Keynan
OBJECTIVES: We sought to determine the incidence of infective endocarditis (IE) from patients with Group C and G streptococci (GCGS) bacteremia, and characterize the burden of disease, clinical characteristics, and outcomes through a case series of patients with GCGS IE. METHODS: Individuals with blood cultures growing GCGS in Manitoba, Canada, between January 2012 and December 2015 were included. Clinical and echocardiographic parameters were collected retrospectively...
October 30, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29096125/biaxial-mechanical-behavior-of-bovine-saphenous-venous-valve-leaflets
#16
Jiaqi Lu, Hsiao-Ying Shadow Huang
Chronic venous disease is caused by chronic venous insufficiency (CVI), which results in significant symptoms such as venous ulcers, ankle eczema, leg swelling, etc. Venous valve incompetence is a major cause of CVI. When the valves of veins in the leg become incompetent (i.e., do not close properly), blood is able to flow backwards (i.e., reflux), which results in blood pooling in the lower extremities, distal venous hypertension, and CVI. Current clinical therapies, such as surgical venous valve reconstruction and bioprosthetic venous valve replacement, are highly invasive and only moderately successful...
October 24, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29096024/antithrombotic-therapy-in-atrial-fibrillation-associated-with-valvular-heart-disease-a-joint-consensus-document-from-the-european-heart-rhythm-association-ehra-and-european-society-of-cardiology-working-group-on-thrombosis-endorsed-by-the-esc-working-group
#17
Gregory Y H Lip, Jean Philippe Collet, Raffaele de Caterina, Laurent Fauchier, Deirdre A Lane, Torben B Larsen, Francisco Marin, Joao Morais, Calambur Narasimhan, Brian Olshansky, Luc Pierard, Tatjana Potpara, Nizal Sarrafzadegan, Karen Sliwa, Gonzalo Varela, Gemma Vilahur, Thomas Weiss, Giuseppe Boriani, Bianca Rocca
Atrial fibrillation (AF) is a major worldwide public health problem, and AF in association with valvular heart disease (VHD) is also common. However, management strategies for this group of patients have been less informed by randomized trials, which have largely focused on 'non-valvular AF' patients. Thrombo-embolic risk also varies according to valve lesion and may also be associated with CHA2DS2VASc score risk factor components, rather than only the valve disease being causal. Given marked heterogeneity in the definition of valvular and non-valvular AF and variable management strategies, including non-vitamin K antagonist oral anticoagulants (NOACs) in patients with VHD other than prosthetic heart valves or haemodynamically significant mitral valve disease, there is a need to provide expert recommendations for professionals participating in the care of patients presenting with AF and associated VHD...
November 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29096006/treatment-of-prosthetic-valve-endocarditis-by-aortic-valve-neocuspidization-using-bovine-pericardium
#18
Yasunori Iida, Kazuma Shimura, Sho Akiyama, Shigeharu Sawa
A 78-year-old man who had undergone aortic valve and ascending aorta replacements presented with fever and was referred to our hospital. Blood culture revealed Gram-positive cocci, thus antibiotic therapy was started. Brain magnetic resonance imaging showed fresh cerebral infarction without cerebral haemorrhage or mycotic aneurysm. Transoesophageal echocardiogram revealed a vegetation that was attached to the right coronary cusp. The patient underwent successful aortic valve neocuspidization using glutaraldehyde-treated bovine pericardium...
October 31, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/29095979/rest-and-exercise-haemodynamics-in-patients-with-one-of-two-stented-bioprostheses-and-in-healthy-controls-with-small-aortic-annuli
#19
Sina Stock, Inga Lohmann, Thorsten Hanke, Ulrich Stierle, Doreen Richardt, Stanislav Tsvelodub, Hans-Hinrich Sievers
OBJECTIVES: Because bioprosthetic aortic valve replacement remains one of the most frequent cardiac surgical procedures, it is necessary to study patient haemodynamics in more detail. Until now, a few studies assessed haemodynamics during exercise, but none with special regard to small aortic annuli. We compared patients who had the differently designed bioprostheses, Trifecta and Perimount Magna Ease (PME), size ≤ 23 mm, and a healthy control group during rest and exercise. METHODS: We determined the mean transvalvular gradient, the effective orifice area (EOA) and the EOA index during rest and exercise using transthoracic echocardiography in 35 patients with the Trifecta (mean age 71...
October 31, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29092126/prosthetic-aortic-valve-endocarditis-without-evidence-of-vegetation
#20
Tasleem Katchi, Howard A Cooper, Srikanth S Yandrapalli, Sahil Khera, John Fallon, David Spielvogel, Wilbert S Aronow, Julio A Panza
Despite significant technological advances, the diagnosis of infective endocarditis (IE) remains a major challenge, and the condition continues to be associated with significant morbidity and mortality. Valvular vegetations have long been the diagnostic and pathologic hallmarks of IE. However, IE can be diagnosed even in the absence of vegetations using the modified Duke criteria. Vegetation-negative endocarditis is rare, and to the present authors' knowledge no cases of septic emboli in the absence of valvular vegetations have been reported...
May 2017: Journal of Heart Valve Disease
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