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Kirov H, Caldonazo T, Doenst T. Treatment of valvular heart disease in young patients-"early evidence" versus "latest fashion". J Card Surg 2022; 37:2375-2377. [PMID: 35535022 DOI: 10.1111/jocs.16607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 04/30/2022] [Indexed: 11/27/2022]
Abstract
Is the performance of locally manufactured mechanical valve prostheses relevant for modern cardiac surgery, in which mechanical valve replacement has become a rarity? This question comes to mind reading the article in this issue of the Journal demonstrating equal outcomes of the TTK Chitra tilting disk mechanical heart valve prostheses in comparison to the SJM bi-leaflet blockbuster. The evidence documenting efficacy of mechanical valve replacement stems from the early ages of cardiac surgery, but often demonstrates superior outcomes in terms of survival and hemodynamics. Yet, the latest fashion in the Western world consists biological choices in combination with new transcatheter techniques (valve in valve options) or the Ozaki or Ross procedures. As long-term results are often missing and documented advantages for mechanical valves stems from early evidence, the local emphasis of mechanical valve replacement may possibly result in superior individual prognoses compared to following the Western world's latest fashions. Individual patient information and decision making moves into focus.
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Affiliation(s)
- Hristo Kirov
- Department of Cardiothoracic Surgery, University Hospital Jena, Friedrich-Schiller-University Jena, Jena, Germany
| | - Tulio Caldonazo
- Department of Cardiothoracic Surgery, University Hospital Jena, Friedrich-Schiller-University Jena, Jena, Germany
| | - Torsten Doenst
- Department of Cardiothoracic Surgery, University Hospital Jena, Friedrich-Schiller-University Jena, Jena, Germany
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Muratori M, Fusini L, Mancini ME, Tamborini G, Ghulam Ali S, Gripari P, Doldi M, Frappampina A, Teruzzi G, Pontone G, Montorsi P, Pepi M. The Role of Multimodality Imaging in Left-Sided Prosthetic Valve Dysfunction. J Cardiovasc Dev Dis 2022; 9:jcdd9010012. [PMID: 35050222 PMCID: PMC8778309 DOI: 10.3390/jcdd9010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 12/10/2022] Open
Abstract
Prosthetic valve (PV) dysfunction (PVD) is a complication of mechanical or biological PV. Etiologic mechanisms associated with PVD include fibrotic pannus ingrowth, thrombosis, structural valve degeneration, and endocarditis resulting in different grades of obstruction and/or regurgitation. PVD can be life threatening and often challenging to diagnose due to the similarities between the clinical presentations of different causes. Nevertheless, identifying the cause of PVD is critical to treatment administration (thrombolysis, surgery, or percutaneous procedure). In this report, we review the role of multimodality imaging in the diagnosis of PVD. Specifically, this review discusses the characteristics of advanced imaging modalities underlying the importance of an integrated approach including 2D/3D transthoracic and transesophageal echocardiography, fluoroscopy, and computed tomography. In this scenario, it is critical to understand the strengths and weaknesses of each modality according to the suspected cause of PVD. In conclusion, for patients with suspected or known PVD, this stepwise imaging approach may lead to a simplified, more rapid, accurate and specific workflow and management.
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Affiliation(s)
- Manuela Muratori
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Laura Fusini
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
- Department of Electronics, Information and Bioengineering, Politecnico di Milano, 20133 Milan, Italy
- Correspondence: ; Tel.: +39-02-5800-2011; Fax: +39-02-5800-2287
| | - Maria Elisabetta Mancini
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Gloria Tamborini
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Sarah Ghulam Ali
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Paola Gripari
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Marco Doldi
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Antonio Frappampina
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Giovanni Teruzzi
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Gianluca Pontone
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
| | - Piero Montorsi
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
- Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, 20122 Milan, Italy
| | - Mauro Pepi
- Centro Cardiologico Monzino IRCCS, 20138 Milan, Italy; (M.M.); (M.E.M.); (G.T.); (S.G.A.); (P.G.); (M.D.); (A.F.); (G.T.); (G.P.); (P.M.); (M.P.)
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Muratori M, Fusini L, Ghulam Ali S, Teruzzi G, Corrieri N, Gripari P, Mapelli M, Annoni A, Tamborini G, Rabbat MG, Pontone G, Alamanni F, Montorsi P, Pepi M. Detection of Mechanical Prosthetic Valve Dysfunction. Am J Cardiol 2021; 150:101-109. [PMID: 34020771 DOI: 10.1016/j.amjcard.2021.03.055] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 01/01/2023]
Abstract
The long-term outcome of mechanical aortic and mitral prosthetic valve (A-PV, M-PV) dysfunction (PVD) remains a serious complication associated with high morbidity and mortality. We sought to evaluate the incremental diagnostic value of combined transthoracic echocardiography (TTE) and fluoroscopy (F) in patients with suspected PVD. A total of 354 patients (178 A-PV, 176 M-PV) were imaged by TTE and F within 5 days of hospital admission. PVD was confirmed by transesophageal echocardiography, computed tomography, effective thrombolysis, or surgical inspection. PVD was confirmed in 101 patients (57%) with M-PV and 99 (55%) with A-PV. Regardless of the mechanism of PVD, TTE shows good sensitivity and specificity, with accuracy of 80% for M-PV and 91% for A-PV. F shows high specificity, but low sensitivity with accuracy of 68% for M-PV and 78% for A-PV. The integration of TTE + F significantly improved accuracy both for M-PV (83%) and A-PV (96%). At ROC analysis, the combined model of TTE + F showed the highest area under the curve for the detection of PVD compared with TTE and F alone (p < 0.001). In conclusion, in patients with a clinical suspicion of PVD, the combined model of TTE + F offers incremental value over TTE or F alone. This multimodality imaging approach overcomes limitations of TTE or F alone and provides prompt identification of patients who may require further imaging assessment and/or closer follow up.
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Affiliation(s)
- Manuela Muratori
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy.
| | - Laura Fusini
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Sarah Ghulam Ali
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Giovanni Teruzzi
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Nicoletta Corrieri
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Paola Gripari
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Massimo Mapelli
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Andrea Annoni
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Gloria Tamborini
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Mark G Rabbat
- Division of Cardiology, Loyola University of Chicago, Chicago, IL; Edward Hines Jr. VA Hospital, Hines, IL
| | - Gianluca Pontone
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
| | - Francesco Alamanni
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy; Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milan, Italy
| | - Piero Montorsi
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy; Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milan, Italy
| | - Mauro Pepi
- Department of Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Milan, Italy
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Ronderos R, Politi MT, Mahia MC, Castro MF, Sciancalepore A, Cueva Torres F, Kuschnir P, de la Paz Ricapito M, Vrancic JM, Camporrotondo M, Piccinini F, Navia D. Hemodynamically significant prosthesis-patient mismatch can be predicted and is associated with early prosthetic valve dysfunction in aortic bioprosthesis. Echocardiography 2021; 38:814-824. [PMID: 33991141 DOI: 10.1111/echo.15068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 04/07/2021] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVES To evaluate the accuracy of predicted prosthesis-patient mismatch (PPM) regarding actual PPM measured postoperatively. To assess the association between PPM and prosthetic valve dysfunction. METHODS Retrospective cohort study including adult patients after aortic valve replacement surgery with a biological prosthesis. Predicted PPM status was determined using mean reference effective orifice area indexed to total body surface (iEOA), without considering reference standard deviations. Postoperative PPM status was determined by measuring iEOA within the first 60 postoperative days. Prosthetic valve dysfunction was defined as thrombosis, pannus, valve degeneration, and/or disruption. RESULTS 205 patients were enrolled between January 2003 and June 2017: predicted PPM was absent in 52 patients (25.4%), moderate in 137 patients (66.8%), and severe in 16 patients (7.8%). After surgery, the actual postoperative iEOA was measured: 53 (25.9%) did not have PPM, 73 had moderate PPM (35.6%), and 79 had severe PPM (38.5%). Predicted PPM identified the presence of hemodynamically significant actual postoperative PPM (OR = 2.56; 95%CI 1.30-5.05; P = .006), though not its degree of severity. Prosthetic valve dysfunction was more frequent among patients with hemodynamically significant PPM (53.9% vs. 11.3%; P < .001), compared to those without PPM. The association between PPM and prosthetic valve dysfunction was maintained after adjusting for gender, age, and ever-smoking (OR = 9.03; P < .001). The incidence of thrombosis or pannus was also nonsignificantly higher in patients with moderate or severe PPM. CONCLUSIONS Predicted PPM identifies the presence, possibly not the severity, of actual postoperative PPM. Moderate or severe PPM is associated with prosthetic valve dysfunction. Actual postoperative prosthesis-patient mismatch measured within 60 postoperative days showed a distinctive hemodynamic profile and presented a stronger association with prosthetic valve dysfunction than predicted prosthesis-patient mismatch. A. Echocardiographic follow-up in patients according to the actual postoperative PPM measured within 60 postoperative days. B. Prediction of prosthetic valve dysfunction based on preoperative predicted PPM or on actual postoperative PPM within 60 postoperative days. PPM: prosthesis-patient mismatch. OR: Odds ratio.
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Affiliation(s)
- Ricardo Ronderos
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - María Teresa Politi
- Laboratorio de Estadística Aplicada a las Ciencias de la Salud (LEACS), Departamento de Toxicología y Farmacología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mariana Cecilia Mahia
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - María Florencia Castro
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Agustina Sciancalepore
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Franklin Cueva Torres
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Paola Kuschnir
- Cardiac Imaging Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | | | - Juan Mariano Vrancic
- Cardiac Surgery Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Mariano Camporrotondo
- Cardiac Surgery Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Fernando Piccinini
- Cardiac Surgery Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
| | - Daniel Navia
- Cardiac Surgery Department, Instituto Cardiovascular de Buenos Aires, Buenos Aires, Argentina
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Proper Orthogonal Decomposition Analysis of the Flow Downstream of a Dysfunctional Bileaflet Mechanical Aortic Valve. Cardiovasc Eng Technol 2021; 12:286-299. [PMID: 33469847 DOI: 10.1007/s13239-021-00519-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/02/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE Aortic valve replacement remains the only viable solution for symptomatic patients with severe aortic valve stenosis. Despite their improved design and long history of successful operation, bileaflet mechanical heart valves are still associated with post-operative complications leading to valve dysfunction. Thus, the flow dynamics can be highly disturbed downstream of the dysfunctional valve. METHODS In this in vitro study, the flow dynamics downstream of healthy and dysfunctional bileaflet mechanical heart valves have been investigated using particle image velocimetry measurements. Proper orthogonal decomposition of the velocity field has been performed in order to explore the coherent flow features in the ascending aorta in the presence of a dysfunctional bileaflet mechanical heart valve. RESULTS The ability of proper orthogonal decomposition derived metrics to differentiate between heathy and dysfunctional cases is reported. Moreover, reduced-order modeling using proper orthogonal decomposition is thoroughly investigated not only for the velocity field but also for higher order flow characteristics such as time average wall shear stress, oscillatory shear index and viscous energy dissipation. CONCLUSION Considering these results, proper orthogonal decomposition can provide a rapid binary classifier to evaluate if the bileaflet mechanical valve deviates from its normal operating conditions. Moreover, the study shows that the size of the reduced-order model depends on which flow parameter is required to be reconstructed.
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Mahindru S, Pande S, Malhotra P, Thukral A, Kotwal AS, Gupta RP, Garg N, Kapoor A, Agarwal SK. Mechanical prosthetic valve thrombosis in current era: 5-year follow-up. Indian J Thorac Cardiovasc Surg 2020; 37:140-146. [PMID: 33642711 DOI: 10.1007/s12055-020-01041-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 08/20/2020] [Accepted: 08/24/2020] [Indexed: 10/23/2022] Open
Abstract
Introduction The incidence of prosthetic valve dysfunction (stuck valve) is variable and is dependent on various factors. There are studies from Indian groups that have emphasized the success of thrombolysis; however, none of them reported a follow-up. This study was designed to emphasize on the follow-up of these patients at midterm. Material and methods The patients of prosthetic valve thrombosis between period of January 2013 and December 2017 were included in this retrospective observational study. Sixty-six patients were admitted with stuck valve during this period. Thrombolysis was preferred modality of treatment. Survivors were followed up with serial echocardiography, which included estimation of left ventricular and valve functions. Results Of a total of 66 patients, 59 were of stuck mitral valve and 7 stuck aortic valve. The event happened at a mean of 48.86 ± 48.80 months after index operation of valve replacement using mechanical valve prosthesis. The median age was 40.27 ± 10.8 years with 39 males and 27 females. Thrombolysis was successful in 61 patients with a mortality of 5 (7.57%). During a mean follow-up of 22.7 ± 20.9 months, 42 patients were alive with 14 (22.95%) patients dead and 5 patients lost to follow-up. The average follow-up was 18.7 ± 22.7 months before death. Conclusion Following good early results after thrombolysis, patients of prosthetic heart valve thrombosis experience high mortality within 2 years of follow-up. These patients require frequent follow-up to avoid early mortality.
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Affiliation(s)
- Supaksh Mahindru
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Shantanu Pande
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Pulkit Malhotra
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Ankit Thukral
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Ankush Singh Kotwal
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Rajan Prasad Gupta
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Naveen Garg
- Department of Cardiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Aditya Kapoor
- Department of Cardiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Surendra Kumar Agarwal
- Department of Cardiovascular and Thoracic Surgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
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Kim W, Choi H, Kweon J, Yang DH, Kim YH. Effects of pannus formation on the flow around a bileaflet mechanical heart valve. PLoS One 2020; 15:e0234341. [PMID: 32530931 PMCID: PMC7292405 DOI: 10.1371/journal.pone.0234341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/23/2020] [Indexed: 11/19/2022] Open
Abstract
Some patients with a bileaflet mechanical heart valve (BMHV) show significant increases in the transvalvular pressure drop and abnormal leaflet motion due to a pannus (an abnormal fibrovascular tissue) formed on the ventricular side, even in the absence of physical contact between the pannus and leaflets. We investigate the effects of the pannus shape (circular or semi-circular ring), implantation location and height on the leaflet motion, flow structure and transvalvular pressure drop using numerical simulations. The valve model considered resembles a 25 mm masters HP valve. The mean systolic pressure drop is significantly increased with increasing pannus height, irrespective of its implantation orientation. Near the peak inflow rate, the flow behind the pannus becomes highly turbulent, and the transvalvular pressure drop is markedly increased by the pannus. At the end of valve opening and the start of valve closing, oscillatory motions of the leaflets occur due to periodic shedding of vortex rings behind the pannus, and their amplitudes become large with increasing pannus height. When the pannus shape is asymmetric (e.g., a semi-circular ring) and its height reaches about 0.1D (D (= 25 mm) is the diameter of an aorta), abnormal leaflet motions occur: two leaflets move asymmetrically, and valve closing is delayed in time or incomplete, which increases the regurgitation volume. The peak energy loss coefficients due to panni are obtained from simulation data and compared with those predicted by a one-dimensional model. The comparison indicates that the one-dimensional model is applicable for the BMHV with and without pannus.
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Affiliation(s)
- Woojin Kim
- Department of Mechanical Engineering, Seoul National University, Seoul, Korea
| | - Haecheon Choi
- Department of Mechanical Engineering, Seoul National University, Seoul, Korea
- Institute of Advanced Machines and Design, Seoul National University, Seoul, Korea
- * E-mail:
| | - Jihoon Kweon
- Department of Cardiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Dong Hyun Yang
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Young-Hak Kim
- Department of Cardiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Koo HJ, Choe J, Kang DY, Ko E, Ahn JM, Park DW, Park SJ, Kim HJ, Kim JB, Choo SJ, Kang JW, Yang DH. Computed Tomography Features of Cuspal Thrombosis and Subvalvular Tissue Ingrowth after Transcatheter Aortic Valve Implantation. Am J Cardiol 2020; 125:597-606. [PMID: 31839148 DOI: 10.1016/j.amjcard.2019.11.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/30/2019] [Accepted: 11/01/2019] [Indexed: 01/17/2023]
Abstract
Post-transcatheter aortic valve implantation (TAVI) computed tomography (CT) findings have not been fully elucidated, except hypoattenuating leaflet thickening (HALT). The objective of this study was to describe cardiac CT findings after TAVI, and investigate factors associated with HALT. This retrospective study included patients who underwent TAVI and post-TAVI cardiac CT scans. On CT, abnormal findings such as hypoattenuating subvalvular thickening (HAST), thrombus within the sinus of Valsalva, HALT, and leaflet motion limitation were thoroughly reviewed. Clinical and CT findings were compared between patients with HALT and those without HALT. Logistic regression analysis was performed to determine factors associated with HALT. A total of 138 patients (64 male, mean 78.5 ± 5.2 years of age) with post-TAVI CT scans were included. The median duration from TAVI to CT was 17.5 days (interquartile range, 3 to 390.8 days). HAST and thrombus within the sinus of Valsalva were detected in 32 (23%) and 5 (4%) patients, respectively. HALT and leaflet motion limitations were found in 25 (18%) and 20 (14%) of patients, respectively. Pannus was diagnosed in 2 patients. TAVI device implant duration (odds ratio [OR], 1.5; p = 0.01), hypertension (OR, 0.2; p = 0.03), and HAST (OR, 4.9; p = 0.003) were associated with HALT. Implant durations were longer in patients with HAST, HALT, or leaflet motion limitation (p < 0.05, for all). In conclusion, HAST, HALT, thrombus within the sinus of Valsalva, and leaflet motion limitation are not uncommon after TAVI. Implant duration, hypertension, and HAST are associated with HALT.
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Kim J, Lee Y, Choi S, Ha H. Pulsatile flow pump based on an iterative controlled piston pump actuator as an in-vitro cardiovascular flow model. Med Eng Phys 2020; 77:118-124. [PMID: 31924498 DOI: 10.1016/j.medengphy.2019.10.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 10/02/2019] [Accepted: 10/20/2019] [Indexed: 10/25/2022]
Abstract
In-vitro cardiovascular experiments provide an effective means for characterizing structural or hemodynamic features of medical devices before they are tested on animals or used in clinical practice. In-vitro experiments simulate complicated cardiovascular systems with blood pumps, vessels and valves, but without human or animal subjects. Therefore, such experiments are free from ethical issues and present large cost savings in comparison to in-vivo experiments. In this study, we aimed to design a fully programmable pulsatile flow pump that can consistently and accurately reproduce a wide range of physiological flow waveforms without costly transient flowmeter in the system. An iterative control algorithm (ICA) was used to minimize the differences between the desired and produced flow waveforms. Our results confirm that the developed pulsatile pump can replicate flow waveforms accurately, with root mean square errors (RMSEs) of 0.64 L/min and 0.52 mL for the flow rate and stroke volume, respectively.
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Affiliation(s)
- Joonyeong Kim
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon 24341, South Korea
| | - Youngjin Lee
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon 24341, South Korea.
| | - Seongwook Choi
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon 24341, South Korea.
| | - Hoijn Ha
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon 24341, South Korea.
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Cui H, Zhang L, Wei S, Jiang S. Early clinical outcomes of simple pannus removal for mechanical aortic valve stenosis. J Cardiothorac Surg 2019; 14:203. [PMID: 31775823 PMCID: PMC6880563 DOI: 10.1186/s13019-019-1022-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 10/30/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND This study aimed to confirm the safety and feasibility of simple pannus removal in patients with mechanical aortic valve dysfunction for pannus overgrowth by evaluating its early clinical outcomes. METHODS From March 2015 to April 2019, 24 consecutive patients with mechanical aortic valve dysfunction due to subaortic pannus underwent reoperation. In 12 patients the repeat aortic valve replacement (AVR) was performed, and 12 received the simple pannus removal to preserve the previously implanted prosthesis. RESULTS There was only 1 in-hospital death in simple pannus removal group. Significant differences were obtained between procedures in cardiopulmonary bypass (CPB) and aortic cross-clamp time (128.7 vs 179.7 and 74.2 vs 132.7 mins, respectively, P < 0.05). The C-reactive protein (CRP) in simple pannus removal group was lower on the first day (0.13 ± 0.09 vs 0.31 ± 0.22 mg/dl, P < 0.05) and continued to be lower within 1 week after operation. There was no significant difference between procedures in aortic transvalvular peak velocity and transvalvular mean pressure gradient (TMPG) (2.6 ± 0.4 vs 2.5 ± 0.4 m/s and 13.2 ± 3.6 vs 11.6 ± 2.6 mmHg, respectively, P > 0.05) in echocardiography 1 week after operation. In addition, the aortic transvalvular peak velocity and TMPG in echocardiography 1 week after operation in pannus removal group between the repeat and initial surgery were not statistically significant (2.6 ± 0.4 vs. 2.5 ± 0.3 m/s, 13.2 ± 3.6 vs. 13.0 ± 3.5 mmHg, P > 0.05). CONCLUSIONS Simple pannus removal was a safe and effective procedure with satisfied early clinical outcomes for pannus overgrowth in mechanical aortic valve. However, further randomized and long-term follow-up studies were warranted to determine the clinical effects of the simple aortic pannus removal.
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Affiliation(s)
- Huimin Cui
- Department of Cardiovascular Surgery, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Lin Zhang
- Department of Cardiovascular Surgery, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Shixiong Wei
- Department of Cardiovascular Surgery, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China
| | - Shengli Jiang
- Department of Cardiovascular Surgery, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
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Ha H, Kvitting JP, Dyverfeldt P, Ebbers T. 4D Flow MRI quantification of blood flow patterns, turbulence and pressure drop in normal and stenotic prosthetic heart valves. Magn Reson Imaging 2019; 55:118-127. [PMID: 30266627 DOI: 10.1016/j.mri.2018.09.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/10/2018] [Accepted: 09/24/2018] [Indexed: 11/17/2022]
Affiliation(s)
- Hojin Ha
- Department of Mechanical and Biomedical Engineering, Kangwon National University, Chuncheon, Republic of Korea; Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
| | - John Peder Kvitting
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden; Department of Cardiothoracic Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Petter Dyverfeldt
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
| | - Tino Ebbers
- Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Center for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden
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