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Prosthetic heart valve size

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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/29129879/transcatheter-aortic-valve-implantation-for-degenerated-19-mm-aortic-bioprosthetic-valve
#2
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/28950312/normal-values-for-doppler-echocardiographic-assessment-of-prosthetic-valve-function-after-transcatheter-aortic-valve-replacement-a-systematic-review-and-meta-analysis
#3
Max-Paul Winter, Martin Zbiral, Antonia Kietaibl, Patrick Sulzgruber, Johannes Kastner, Raphael Rosenhek, Thomas Binder, Irene M Lang, Georg Goliasch
Transcatheter aortic valve replacement has emerged as valuable treatment modality for patients with severe aortic stenosis and an unacceptable risk/benefit ratio for open heart surgery, but particularities specific to TAVR and a rapidly growing number of available TAVR prosthesis make post-procedural assessment of valve function challenging. Aim of the present analysis was to collect and pool all available data currently in the literature regarding normal doppler values for transcatheter prosthetic heart valves and to provide a comprehensive overview...
September 6, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28847146/on-x-versus-st-jude-medical-mechanical-prosthesis-in-mitral-position-are-we-moving-forward-in-design-technology
#4
Ezzeldin A Mostafa, Ashraf A El Midany, Ahmed S Taha, Saeed R El Aasy, Ayman A Doghish, Ahmed Helmy, Sherif A Mansour, Ramy Khorshid, Hosam E Ashor, Yaser Elnahas, Mohammed Saffan
BACKGROUND: Continuous effort is still provided in designing optimal artificial heart valves with better hemodynamic function and reduced thromboembolic potential. The question is do we have moved forward toward this goal or not. METHODS: A prospective, randomized comparative study was done on 360 patients scheduled for elective mitral valve replacement. Patients were grouped into On-X group (n=180) who received On-X mechanical valve and SJM (n=180) who received St Jude mechanical valve...
July 28, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28780576/mechanical-and-surgical-bioprosthetic-valve-thrombosis
#5
REVIEW
Wei Yao Lim, Guy Lloyd, Sanjeev Bhattacharyya
Valve thrombosis can occur in mechanical prosthetic valves and is increasingly recognised in transcatheter and surgically implanted bioprosthetic valves. The risk of thrombosis of mechanical valves is higher in the mitral position compared with aortic position and in older generation valves (ball and cage valves). There is a wide spectrum of presentation from the asymptomatic patient to those with embolic complications or cardiogenic shock. A combination of transthoracic and transesophageal echocardiography is required to assess the haemodynamic effect of thrombosis (valve gradients and area), leaflet motion and thrombus size...
August 5, 2017: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/28722138/a-red-blood-cell-model-to-estimate-the-hemolysis-fingerprint-of-cardiovascular-devices
#6
Riccardo Toninato, Giuseppe Fadda, Francesca Maria Susin
One of the most relevant and open issues within cardiovascular prosthetic hemodynamic performance is a realistic quantification of the damage sustained by red blood cells (RBCs). Specifically, the optimal design of bileaflet mechanical heart valves (BMHVs) requires both low shear stresses along the leaflets and short particle resident times. This study approaches RBC damage estimation by developing a numerical model of RBCs and computing the damage sustained by a set of passive RBCs immersed within in vitro flows...
July 19, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28430305/turbulence-measurements-in-an-axial-rotary-blood-pump-with-laser-doppler-velocimetry
#7
Chan Y Schüle, Klaus Affeld, Max Kossatz, Christian O Paschereit, Ulrich Kertzscher
BACKGROUND: The implantation of rotary blood pumps as ventricular assist devices (VADs) has become a viable therapy for quite a number of patients with end-stage heart failure. However, these rotary blood pumps cause adverse events that are related to blood trauma. It is currently believed that turbulence in the pump flow plays a significant role. But turbulence has not been measured to date because there is no optical access to the flow space in rotary blood pumps because of their opaque casings...
April 18, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28228313/significant-intra-valvular-pressure-loss-across-epic-supra-and-perimount-magna-supra-annular-designed-aortic-bioprostheses-in-patients-with-normal-aortic-size
#8
Jagdish C Mohan, Vishwas Mohan, Madhu Shukla, Arvind Sethi
Doppler-derived trans-prosthetic gradients are higher and the estimated effective valve area is smaller than the catheter-derived and directly measured hemodynamic values, mostly due to pressure recovery phenomenon. Pressure recovery to a varying extent is common to all prosthetic heart valves including bioprostheses. Pressure recovery-related differences are usually small except in patients with bileaflet metallic prosthesis, wherein high-pressure local jets across central orifice have been documented since long back and also in patients with narrow aortic root...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28070934/long-term-outcomes-after-mechanical-aortic-valve-replacement-with-aortic-root-enlargement-in-adolescents
#9
Zhiwei Xu, Qiuxia Shi, Ju Mei, Yan Tan
BACKGROUND: Deciding which prosthetic aortic valve to choose is difficult in adolescents who have not yet met their full growth potential. The aim of this study was to assess long-term outcomes following mechanical aortic valve replacement with aortic root enlargement in adolescents. METHODS: Between September 1997 and December 2006, 58 consecutive adolescents (49 male, 9 female, median age 15.5, range 13 to 17 years) underwent mechanical aortic valve replacement with aortic root enlargement...
February 2017: Journal of Cardiac Surgery
https://www.readbyqxmd.com/read/27995570/hydrodynamic-assessment-of-aortic-valves-prepared-from-porcine-small-intestinal-submucosa
#10
Sharan Ramaswamy, Makensley Lordeus, Omkar V Mankame, Lilliam Valdes-Cruz, Steven Bibevski, Sarah M Bell, Ivan Baez, Frank Scholl
Infants and children born with severe cardiac valve lesions have no effective long term treatment options since currently available tissue or mechanical prosthetic valves have sizing limitations and no avenue to accommodate the growth of the pediatric patient. Tissue engineered heart valves (TEHVs) which could provide for growth, self-repair, infection resistance, and long-term replacement could be an ideal solution. Porcine small intestinal submucosa (PSIS) has recently emerged as a potentially attractive bioscaffold for TEHVs...
March 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/27818021/therapeutic-strategy-for-functional-tricuspid-regurgitation-in-patients-undergoing-mitral-valve-repair-for-severe-mitral-regurgitation
#11
Takeshi Kitai, Yutaka Furukawa, Kenta Murotani, Chayakrit Krittanawong, Shuichiro Kaji, Tadaaki Koyama, Yukikatsu Okada
BACKGROUND: The aim of this study was to determine optimal patient selection and selection of a prosthetic ring size for tricuspid valve (TV) repair at the time of mitral valve (MV) repair. METHODS: We prospectively enrolled 167 consecutive patients undergoing MV repair. TV repair was indicated if patients had at least one of the following conditions representing tricuspid annular dilatation: (1) tricuspid regurgitation (TR)≥moderate, (2) history of right heart failure, (3) atrial fibrillation, and (4) pulmonary hypertension...
January 15, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27759926/paravalvular-leaks-one-size-or-shape-doesn-t-always-fit-all
#12
COMMENT
Andre Paixao, Mehmet Cilingiroglu
Paravalvular leak (PVL) remains as uncommon but serious complication after surgical prosthetic valve implantation. PVL when associated which congestive heart failure, hemolytic anemia, or infective endocarditis may require percutaneous treatment. High-surgical risk is common in this population. Dedicated PVL devices are lacking often limiting optimal treatment.
October 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27549435/the-economic-value-of-intuity-in-aortic-valve-replacement
#13
Matthew Moore, Glenn R Barnhart, Walter Randolph Chitwood, John A Rizzo, Candace Gunnarsson, Swetha R Palli, Eugene A Grossi
OBJECTIVE: The recent development of the EDWARDS INTUITY Elite™ (EIE) valve system enables the rapid deployment of a prosthetic surgical heart valve in an aortic valve replacement (AVR) procedure via both the minimally invasive (MISAVR) and conventional (CAVR) approaches. In order to understand its economic value, this study performed a cost evaluation of the EIE valve system used in a MIS rapid-deployment approach (MIS-RDAVR) vs MISAVR and CAVR, respectively, compared to standard prosthetic aortic valves...
October 2016: Journal of Medical Economics
https://www.readbyqxmd.com/read/27356759/mechanical-aortic-valve-without-anticoagulation-for-33%C3%A2-years-in-a-yemeni-man-a-case-report
#14
Khadija Aman
BACKGROUND: Mechanical prosthetic heart valves have been used for many decades to replace damaged native valves. Guidelines mandate the use of anticoagulant therapy in patients with mechanical prosthetic valves of any type, irrespective of the position in the heart. The rationale for this is to prevent valve thrombosis and thromboembolic complications without increasing the risk of excess bleeding. We report a case involving a patient with a functioning aortic mechanical valve without any anticoagulation therapy for 33 years...
June 29, 2016: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/27207984/rare-case-of-simultaneous-enterococcal-endocarditis-and-prosthetic-joint-infection
#15
Sean I Tracy, Sherry-Ann Brown, John T Ratelle, Anjali Bhagra
A 59-year-old man was admitted with a 3-month history of daily fevers as well as bilateral knee pain and swelling. Medical history was significant for bilateral knee arthroplasties 4 years prior to admission. Two sets of peripheral blood cultures as well as bilateral knee synovial fluid grew Enterococcus faecalis within 10 hours. Transoesophageal echocardiography revealed aortic and mitral valve vegetations suggestive of infectious endocarditis, with severe regurgitation secondary to large size. The patient's hospitalisation was complicated by acute heart failure, necessitating emergent mitral valve repair and aortic valve replacement, followed shortly thereafter by bilateral total knee arthroplasty resection with placement of antibiotic spacers...
May 20, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27111308/long-term-outcome-in-patients-with-prosthetic-valve-endocarditis-results-from-a-single-center-in-turkey
#16
Yeşim Güray, Esra Gücük İpek, Burak Acar, Mevlüt Serdar Kuyumcu, Fatih Uçar, Habibe Kafes, Lale Asırcıklı, Gizem Çabuk, Burcu Demirkan, Ümit Güray
OBJECTIVE: Prosthetic valve endocarditis (PVE) is associated with increased mortality and morbidity. Information regarding the long-term outcome of PVE is scarce in Turkey. The aim of this study was to evaluate long-term mortality rates of PVE and identify predictors of mortality in these patients. METHODS: From January 2008 through August 2013, 44 patients (25 male, 19 female; mean age 49.3±12.1 years) who received a definitive diagnosis of PVE enrolled in the study...
March 2016: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/27047280/the-mosaic-mitral-valve-bioprosthesis-a-long-term-clinical-and-hemodynamic-follow-up
#17
Michele Celiento, Stefania Blasi, Andrea De Martino, Stefano Pratali, Aldo D Milano, Uberto Bortolotti
We reviewed the cases of 100 patients (mean age, 73 ± 10 yr; 64 men) who had mitral valve replacement with a Medtronic Mosaic porcine bioprosthesis from 1995 through 2011. The mean New York Heart Association (NYHA) class was 3 ± 0.7, and 52 patients were in atrial fibrillation. Prosthetic sizes were chiefly 27 mm (50 patients) and 29 mm (40 patients). Follow-up ended in December 2012 and is 97% complete, with a cumulative duration of 611 patient-years (mean duration, 6 ± 4.6 yr; maximum, 17.7 yr). The early mortality rate was 10% (6% in elective patients); late deaths occurred in 31 patients (5 valve-related)...
February 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/26702146/echocardiographic-assessment-of-aortic-valve-annular-and-left-ventricular-outflow-tract-diameter-in-conscious-and-anesthetized-adult-sheep-prior-to-prosthetic-aortic-valve-implantation
#18
Noah Barka, Jason Bourgoin, Erin Grassl, John A St Cyr
OBJECTIVE: Prosthetic heart valve implantation is commonly performed in patients that have valvular heart disease. Prior to clinical evaluation of newly developed prostheses, preclinical animal studies are performed for the assessment of both acute and chronic valvular function. Commonly, one size of valve is used in these preclinical studies, which can present difficulties with the implantation procedure and assessing valve function. Due to these potential problems, we developed a preoperative screening assessment in potential ovine candidates for prosthetic aortic valve implantation...
August 2016: Therapeutic Advances in Cardiovascular Disease
https://www.readbyqxmd.com/read/26566406/treatment-of-prosthetic-valve-thrombosis-current-evidence-and-future-directions
#19
REVIEW
Murat Biteker, Ibrahim Altun, Ozcan Basaran, Volkan Dogan, Birdal Yildirim, Gokhan Ergun
Prosthetic heart valve thrombosis (PVT) is a rare but serious complication with high morbidity and mortality. The optimal treatment of the PVT is controversial and depends on thrombus location and size, the patient's functional class, the risk of surgery or thrombolysis, and the clinician's experience. Although surgical therapy has been the traditional therapeutic approach, studies with low-dose and slow-infusion rates of thrombolytic agents have revealed excellent results. This article reviews the various treatment options in patient with PVT...
December 2015: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/26430503/silent-fistula-of-the-ascending-aorta-to-pericardium-by-brucella-endocarditis
#20
Feridoun Sabzi, Siavoosh Vaziri, Reza Faraji
We report the case of a 26-year-old male patient with 2-week history of Brucella aortic valve endocarditis that was referred from general hospital to our hospital emergency room with pallor of the skin and mucous membranes accompanied by systemic hypotension and chest pain. Trans esophageal echocardiography (TEE) revealed a 30-mm ascending aorta at the pulmonary trunk with no evidence of the false lumen or intimal flap. TEE also showed a large vegetation of the aortic valve that limited to noncoronary sinus with moderate pericardial effusion...
2015: Journal of Cardiovascular and Thoracic Research
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