The results of transcatheter mitral valve replacement

Sharifulin, Ravil; Богачев-Прокофьев, А. В.; Журавлева, И. Ю.; Timchenko, T.P.; Железнев, С. И.; Караськов, А. М.

doi:10.15829/1560-4071-2018-11-137-144

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…Смертность от всех причин, n (%) 54 (10,4) 20 (6,2) 14 (9,9) 20 (34,5) <0,001b,c Инсульт, n (%) 9 (1,9) 7 (2,3) 0 (0,0) 2 (3,9) 0,10…”

Section: результат 30 днейunclassified

“…Митральная регургитация встречается более чем в 1% случаев в популяции лиц старше 70 лет [1] и в 10% случаев в возрасте старше 75 лет [2,3]. У 50% больных в этой группе стандартное хирургическое пособие не может быть выполнено в связи с высоким риском развития неблагоприятных исходов [4]. Повторная операция на митральном клапане (МК) требуется у 20-35% пациентов через 10 лет после хирургического биопротезирования, и до 50% через 15 лет [5][6][7].…”

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Transseptal transcatheter mitral valve replacement

2020

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The review presents current data transseptal transcatheter mitral valve replacement, which is becoming an alternative method of managing mitral valve disease. Despite the fact that the transapical transcatheter approach is technically simpler, the transseptal method is less invasive. It has confirmed effectiveness and is predicted to be the most promising. The review describes the relevance, indications, methodology for selecting the required endoprosthesis, stages of procedure, complications, and the postoperative follow-up of patients. The results of publications on transseptal transcatheter mitral valve replacement are analyzed. A case report is given.

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“…Смертность от всех причин, n (%) 54 (10,4) 20 (6,2) 14 (9,9) 20 (34,5) <0,001b,c Инсульт, n (%) 9 (1,9) 7 (2,3) 0 (0,0) 2 (3,9) 0,10…”

Section: результат 30 днейunclassified

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Transseptal transcatheter mitral valve replacement

2020

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“…In orthopedics, Nitinol is used as a material for medical staples and other implants to treat various diseases of the skeletal system. In dentistry, the alloy is used as braces, in cardiology-as stents, artificial heart valves, pacemakers, and many other medical products [3,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

TiNi Alloy Lattice Structures with Negative Poisson’s Ratio: Computer Simulation and Experimental Results

Farber

Orlov

Борисов

et al. 2022

Metals

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One of the issues that modern implants face is their high stiffness, coupled with a positive Poisson’s ratio along the implant. This creates certain problems with bone inflammation and implant detachment. A possible solution to these problems is TiNi alloy lattice structure implants with low stiffness and negative Poisson’s ratio. This paper presents the results of simulation, fabrication by the SLM technique, and study of lattice structures with negative Poisson’s ratio, which can help to solve said problems. The studies involve the determination of mechanical characteristics, Poisson’s ratio, transformation temperatures, and the potential for a superelasticity effect of the lattice structure. The characteristics obtained at initial simulation were partially confirmed in the course of the works. Moreover, the possibility of fabricating TiNi alloy lattice structures with negative Poisson’s ratio (about −0.00323) and low Young’s modulus values (0.818 GPa) was confirmed by the SLM technique.

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“…Существенные недостатки полного протезирования -необходимость пожизненного приема антикоагулянтов и высокий риск повторного вмешательства. Оба фактора нивелируются использованием транскатетерных протезов, однако пока такая методика не распространена за пределами клинических испытаний [5]. Таким образом, клапаносохраняющие вмешательства предпочтительны для данных пациентов.…”

Section: Introductionunclassified

Numerical assessment of the anatomy of the annulus fibrosus of the mitral valve in health and disease as per three-dimensional echocardiography

Овчаренко¹,

Клышников²,

Сизова³

et al. 2021

PKiK

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Aim. We analysed the geometry and dynamics of the annulus fibrosus of the mitral valve in normal conditions, with mitral regurgitation of degenerative and ischaemic aetiology based on three-dimensional echocardiography with subsequent mathematical processing.Methods. We included the data of transesophageal three-dimensional echocardiography of 50 patients in the following three groups: 10 patients with degenerative regurgitation, 10 patients with ischaemic mitral regurgitation and 30 patients in the ‘normal’ group without mitral valve pathology. Transesophageal echocardiography was performed using an iE33 expert level equipment (Philips, USA), to quantitatively analyse the anterior-posterior diameter, anterolateral-posterior median diameter, intercommissural diameter, three-dimensional circumference of mitral valve, two-dimensional height of the coaptation zone, leaf height, maximum height, front and back angles of the valves, nonplanar angle, planarity coefficient and ellipticity coefficient. The measurements were performed for both the phases of the cardiac cycle, the period of expulsion of systole and the period of diastole filling, corresponding to the closed and open states of the valve. In addition, the treated data sets were processed in the QLAB programme (Philips, USA) where sets of points describing the geometry of the mitral valve were obtained. Thereafter, we used the in-house algorithm in the MATLAB R2015a environment (MathWorks, Massachusetts, USA). Mathematical models of the anatomy of the annulus rings were obtained for all the three studied groups.Results. A functional study of the mitral valve showed a similar nature of changes in the geometric features of the annulus fibrosus for both the pathologies. The dynamic performance of the fibrous rings during systole-diastole cycle significantly differed among the studied groups. We present the equations for the averaged models of the annulus fibrosus of the groups analysed in the study that can be used in design, verification and computer modelling problems.Conclusion. Pathological changes in the geometry of the mitral valve during ischaemic and degenerative regurgitation work on a similar principle, although there are aetiological differences. However, these pathologies differ when the changes in the geometry of the dynamics of ‘systole-diastole’ are analysed that warrant the use of different approaches and devices for their correction.Received 5 November 2020. Revised 12 December 2020. Accepted 22 December 2020.Funding: The work is supported by a grant of the President of the Russian Federation No. 075-15-2020-067.Conflict of interest: Authors declare no conflict of interest.Author contributions Conception and study design: E.A. Ovcharenko, L.S. Barbarash Data collection and analysis: K.Yu. Klyshnikov, I.N. Sizova, N.V. Kondyukova Statistical analysis: K.Yu. Klyshnikov Drafting the article: E.A. Ovcharenko, K.Yu. Klyshnikov Critical revision of the article: E.A. Ovcharenko, K.Yu. Klyshnikov, I.N. Sizova, N.V. Kondyukova Final approval of the version to be published: E.A. Ovcharenko, K.Yu. Klyshnikov, I.N. Sizova, N.V. Kondyukova, L.S. Barbarash

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The results of transcatheter mitral valve replacement

Cited by 4 publications

References 39 publications

Transseptal transcatheter mitral valve replacement

Transseptal transcatheter mitral valve replacement

TiNi Alloy Lattice Structures with Negative Poisson’s Ratio: Computer Simulation and Experimental Results

Numerical assessment of the anatomy of the annulus fibrosus of the mitral valve in health and disease as per three-dimensional echocardiography

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