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Larti F, Geraiely B, Asli SH, Moghadam AS. Revisiting echocardiographic features of prosthetic heart valves: the necessity of correct differentiation of mono-leaflet vs. bileaflet mechanical heart valves in a case report. J Cardiothorac Surg 2024; 19:176. [PMID: 38576022 PMCID: PMC10996195 DOI: 10.1186/s13019-024-02633-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/11/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Mechanical heart valve replacement is a standard treatment for severe valvular disorders. The use of mono-leaflet valves has decreased recently. Recognizing the echocardiographic features of mono-leaflet and bileaflet valves is crucial for accurate complication diagnosis and proper management. CASE PRESENTATION A 65-year-old female with mono-leaflet mitral and bileaflet tricuspid valves underwent an echocardiographic assessment. This simple educational case provides a unique opportunity to compare the echocardiographic features of these valves within a single patient. CONCLUSION There is a crucial need for clinicians, particularly those in training, to differentiate between mono-leaflet and bileaflet mechanical heart valves adeptly. With mono-leaflet valves decreasing in prevalence, proficiency in recognizing the echocardiographic nuances of each type is imperative. Failure to do so may result in misdiagnoses and inappropriate management. This underscores the significance of continuous education and vigilance in echocardiographic assessments to ensure optimal patient care.
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Affiliation(s)
- Farnoosh Larti
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Keshavarz Boulevard, Tehran, Iran
| | - Babak Geraiely
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Keshavarz Boulevard, Tehran, Iran
| | - Samaneh Hasanpour Asli
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Keshavarz Boulevard, Tehran, Iran
| | - Arman Soltani Moghadam
- Department of Cardiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Keshavarz Boulevard, Tehran, Iran.
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Chen A, Azriff Basri A, Ismail NB, Arifin Ahmad K. Hemodynamic Effects of Subaortic Stenosis on Blood Flow Characteristics of a Mechanical Heart Valve Based on OpenFOAM Simulation. Bioengineering (Basel) 2023; 10:312. [PMID: 36978704 PMCID: PMC10045469 DOI: 10.3390/bioengineering10030312] [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: 01/19/2023] [Revised: 02/22/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Subaortic stenosis (SAS) is a common congenital heart disease that can cause significant morbidity and mortality if not treated promptly. Patients with heart valve disease are prone to complications after replacement surgery, and the existence of SAS can accelerates disease progression, so timely diagnosis and treatment are required. However, the effects of subaortic stenosis on mechanical heart valves (MHV) are unknown. This study aimed to investigate flow characteristics in the presence of subaortic stenosis and computationally quantify the effects on the hemodynamics of MHV. Through the numerical simulation method, the flow characteristics and related parameters in the presence of SAS can be more intuitively observed. Based on its structure, there are three types of SAS: Tunnel-type SAS (TSS); Fibromuscular annulus SAS (FSS); Discrete SAS (DSS). The first numerical simulation study on different types of SAS found that there are obvious differences among them. Among them, the tunnel-type SAS formed a separated vortex structure on the tunnel-type narrow surface, which exhibits higher wall shear force at a low obstacle percentage. However, discrete SAS showed obvious differences when there was a high percentage of obstacles, forming high peak flow, high wall shear stress, and a high-intensity complex vortex. The presence of all three types of SAS results in the formation of high-velocity jets and complex vortices in front of the MHV, leading to increased shear stress and stagnation time. These hemodynamic changes significantly increase the risk of MHV dysfunction and the development of complications. Despite differences between the three types of SAS, the resultant effects on MHV hemodynamics are consistent. Therefore, early surgical intervention is warranted in SAS patients with implanted MHV.
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Affiliation(s)
- Aolin Chen
- Department of Mechanical Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Adi Azriff Basri
- Department of Aerospace Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Norzian Bin Ismail
- Department of Medicine, Faculty of Medicine and Health Sciences, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
| | - Kamarul Arifin Ahmad
- Department of Aerospace Engineering, Faculty of Engineering, University Putra Malaysia, Serdang 43400, Selangor, Malaysia
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Yousef S, Amabile A, Ram C, Singh S, Agarwal R, Milewski R, Assi R, Patel PA, Krane M, Geirsson A, Vallabhajosyula P. Direct relationship between transvalvular velocity and cardiac dysfunction, morbidity, and mortality in patients with aortic stenosis. J Card Surg 2022; 37:5052-5062. [PMID: 36378856 DOI: 10.1111/jocs.17199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 10/29/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Current guidelines recommend intervention in subjects with severe symptomatic aortic stenosis (AS), even though any degree of AS is associated with a higher risk of mortality. We investigated the association between the degree of AS, delineated by transvalvular flow velocity, and patient morbidity and mortality. METHODS Medically managed patients aged 40-95 years with maximum flow velocity (Vmax ) by echocardiography between 2013 and 2018 were stratified into five groups (A-E) based on the 75th, 90th, 97.5th, and the 99th percentiles of Vmax distribution. Patient characteristics, cardiac structural changes, and end-organ disease were compared using Kruskal-Wallis and Cochran-Armitage tests. Mortality over a median of 2.8 (1.52-4.8) years was compared using Kaplan-Meier curves and risk estimates were derived from the Cox model. RESULTS The Vmax was reported in 37,131 patients. There was a steady increase (from Group A towards E) in age, Caucasian race, structural cardiac changes, end-organ morbidities, and all-cause mortality. In reference to Group A, there as an increased risk of mortality in Groups B (hazard ratio [HR] = 1.3; confidence interval [CI]: 1.2-1.35; p < .0001), C (HR = 1.5; CI: 1.4-1.6; p < .0001), and D (HR = 1.8; CI: 1.6-2; p < .0001), with an exponential increase in Group E (HR = 2.5; CI: 2.2-2.8; p < .0001). CONCLUSIONS A direct, strong correlation exists between the degree of AS and cardiac structural changes and mortality. Patients with Vmax ≥ 97.5th percentile (≥3.2 m/s) might benefit from early intervention.
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Affiliation(s)
- Sameh Yousef
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Andrea Amabile
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Chirag Ram
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Saket Singh
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Ritu Agarwal
- Joint Data Analytics Team, Information Technology Service, Yale University, New Haven, Connecticut, USA
| | - Rita Milewski
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Roland Assi
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Prakash A Patel
- Division of Cardiac Anesthesiology, Yale School of Medicine, New Haven, Connecticut, USA
| | - Markus Krane
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
| | - Arnar Geirsson
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, Connecticut, USA
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4
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OUP accepted manuscript. Eur J Cardiothorac Surg 2022; 62:6547516. [DOI: 10.1093/ejcts/ezac133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/26/2022] [Accepted: 02/14/2022] [Indexed: 11/14/2022] Open
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5
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Sari M, Bayram Z, Ayturk M, Bayam E, Kalkan S, Guner A, Kalcik M, Gursoy MO, Gunduz S, Ozkan M. Characteristic localization patterns of thrombus on various brands of bileaflet mitral mechanical heart valves as assessed by three-dimensional transesophageal echocardiography and their relationship with thromboembolism. Int J Cardiovasc Imaging 2021; 37:2691-2705. [PMID: 33835319 DOI: 10.1007/s10554-021-02234-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 03/30/2021] [Indexed: 12/24/2022]
Abstract
Three-dimensional transesophageal echocardiography (3D-TEE) provides detailed images of prosthetic valve thrombosis (PVT). However, data regarding PVT localization patterns based on 3D-TEE and their association with clinical findings among various bileaflet mitral prosthetic valve brands is lacking. The locations of thrombi were classified into 4 groups according to hinge and annulus involvement based on 3D-TEE: ring-like PVT involving entire mitral annulus (type-1), PVT involving peri-hinge(s) region and extends through some part of the annulus (type-2), PVT involving mitral annulus without involving hinge(s) region (type-3), and PVT involving only (peri)hinge(s) area (type-4). This study was conducted in 265 patients (male: 71, mean age: 46.3 ± 12.7 years) with mitral PVT, including 150 St Jude Medical (SJM), 65 Carbomedics, 29 Medtronic ATS open-pivot, and 21 Sorin bileaflet mechanical valves. There was a significant difference in most common PVT localization patterns between different prosthetic valves (type-1 for Carbomedics and Sorin; type-2 for SJM and type-3 for ATS valves; p < 0.001). Additionally, PVT involving only (peri)hinge region(s) (type-4) was mostly observed in patients with SJM valves (18%). (Peri)hinge(s) area involvement was observed in the majority of study patients (78.1%). In patients who presented with thromboembolism, the most common PVT localization pattern was type-1 (53%). Increased age, low international normalized ratio on admission, PVT with a mobile part > 2 mm, type-1 and type-4 PVT were associated with thromboembolic events. In conclusion, thrombus can be displayed in distinct locations in several types of bileaflet mechanical valves due to different design, hinge and pivot mechanisms, which can be complicated with thromboembolic events.
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Affiliation(s)
- Munevver Sari
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey.
| | - Zubeyde Bayram
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey
| | - Mehmet Ayturk
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey
| | - Emrah Bayam
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey
| | - Semih Kalkan
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey
| | - Ahmet Guner
- Department of Cardiology, Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey
| | - Macit Kalcik
- Department of Cardiology, Faculty of Medicine, Hitit University, Çorum, Turkey
| | - Mustafa Ozan Gursoy
- Department of Cardiology, Izmir Ataturk Training and Research Hospital, Izmir, Turkey
| | - Sabahattin Gunduz
- Department of Cardiology, VM Medikal Park Pendik Hospital, Istanbul, Turkey
| | - Mehmet Ozkan
- Department of Cardiology, Kosuyolu Kartal Heart Training and Research Hospital, Denizer caddesi, Cevizli Kavsagi, Kartal, 34865, Istanbul, Turkey
- Faculty of Health Sciences, University of Ardahan, Ardahan, Turkey
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Dietrich M, Mankad R. Elevated Prosthetic Valve Gradients: What to Consider When Determining an Etiology. J Cardiothorac Vasc Anesth 2021; 35:2223-2227. [PMID: 33744112 DOI: 10.1053/j.jvca.2021.02.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 11/11/2022]
Abstract
DOPPLER echocardiography is a useful noninvasive tool for the assessment of cardiac hemodynamics. However, it is subject to limitations that can have important clinical implications, especially in the setting of valve prosthesis. Elevation in mean transvalvular gradient is a finding that has a variety of etiologies. One such etiology is the pressure-recovery (PR) phenomenon, a consequence of stream convergence and energy conversion across a narrowing, which is an artifact of Doppler echocardiographic calculations of valvular flow. The elevated gradient measured with Doppler echocardiography as a result of PR is not present on cardiac catheterization and does not represent true problematic valve hemodynamics. PR should be suspected with an elevated gradient on Doppler echocardiography with normal leaflet motion, especially in the setting of a small proximal aorta. Understanding and awareness of PR are important because PR can lead to overestimation of disease severity in the clinical setting.
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Farzaneh K, Mortazavi SH, Oraii A, Abbasi K, Salehi Omran A, Ahmadi Tafti SH, Bozorgi A, Kazemi Saeed A, Salarifar M, Sadeghian S. Safety of thrombolytic therapy in patients with prosthetic heart valve thrombosis who have high international normalized ratio levels. J Card Surg 2020; 35:2522-2528. [DOI: 10.1111/jocs.14777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Khadijeh Farzaneh
- Department of Cardiology, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | | | - Alireza Oraii
- Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | - Kyomars Abbasi
- Department of Cardiac Surgery, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | - Abbas Salehi Omran
- Department of Cardiac Surgery, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | | | - Ali Bozorgi
- Department of Cardiology, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | - Ali Kazemi Saeed
- Department of Cardiology, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | - Mojtaba Salarifar
- Department of Cardiology, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
| | - Saeed Sadeghian
- Department of Cardiology, Tehran Heart Center Tehran University of Medical Sciences Tehran Iran
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Abstract
Heart valve diseases are common disorders with five million annual diagnoses being made in the United States alone. All heart valve disorders alter cardiac hemodynamic performance; therefore, treatments aim to restore normal flow. This paper reviews the state-of-the-art clinical and engineering advancements in heart valve treatments with a focus on hemodynamics. We review engineering studies and clinical literature on the experience with devices for aortic valve treatment, as well as the latest advancements in mitral valve treatments and the pulmonic and tricuspid valves on the right side of the heart. Upcoming innovations will potentially revolutionize treatment of heart valve disorders. These advancements, and more gradual enhancements in the procedural techniques and imaging modalities, could improve the quality of life of patients suffering from valvular disease who currently cannot be treated.
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Affiliation(s)
- Gil Marom
- School of Mechanical Engineering, Tel Aviv University, Tel Aviv Israel
- To whom correspondence should be addressed. E-mail:
| | - Shmuel Einav
- Department of Biomedical Engineering, Tel Aviv University, Tel Aviv, Israel
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9
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Gonzalez BA, Pour Issa E, Mankame OV, Bustillos J, Cuellar A, Rodriguez AJ, Scholl F, Bibevski S, Hernandez L, Brehier V, Casares M, Rivas-Wagner K, Morales P, Lopez J, Wagner J, Bibevski J, Agarwal A, George F, Ramaswamy S. Porcine Small Intestinal Submucosa Mitral Valve Material Responses Support Acute Somatic Growth. Tissue Eng Part A 2020; 26:475-489. [PMID: 31802695 DOI: 10.1089/ten.tea.2019.0220] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Background: Conceptually, a tissue engineered heart valve would be especially appealing in the pediatric setting since small size and somatic growth constraints would be alleviated. In this study, we utilized porcine small intestinal submucosa (PSIS) for valve replacement. Of note, we evaluated the material responses of PSIS and subsequently its acute function and somatic growth potential in the mitral position. Methods and Results: Material and mechanical assessment demonstrated that both fatigued 2ply (∼65 μm) and 4ply (∼110 μm) PSIS specimens exhibited similar failure mechanisms, but at an accelerated rate in the former. Specifically, the fatigued 2ply PSIS samples underwent noticeable fiber pullout and recruitment on the bioscaffold surface, leading to higher yield strength (p < 0.05) and yield strain (p < 0.05) compared to its fatigued 4ply counterparts. Consequently, 2ply PSIS mitral valve constructs were subsequently implanted in juvenile baboons (n = 3). Valve function was longitudinally monitored for 90 days postvalve implantation and was found to be robust in all animals. Histology at 90 days in one of the animals revealed the presence of residual porcine cells, fibrin matrix, and host baboon immune cells but an absence of tissue regeneration. Conclusions: Our findings suggest that the altered structural responses of PSIS, postfatigue, rather than de novo tissue formation, are primarily responsible for the valve's ability to accommodate somatic growth during the acute phase (90 days) following mitral valve replacement. Impact Statement Tissue engineered heart valves (TEHVs) offer the potential of supporting somatic growth. In this study, we investigated a porcine small intestinal submucosa bioscaffold for pediatric mitral heart valve replacement. The novelty of the study lies in identifying material responses under mechanical loading conditions and its effectiveness in being able to function as a TEHV. In addition, the ability of the scaffold valve to support acute somatic growth was evaluated in the Baboon model. The current study contributes toward finding a solution for critical valve diseases in children, whose current prognosis for survival is poor.
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Affiliation(s)
- Brittany A Gonzalez
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
| | - Elnaz Pour Issa
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
| | - Omkar V Mankame
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
| | - Jenniffer Bustillos
- Department of Mechanical and Material Engineering, Florida International University, Miami, Florida, USA
| | - Antonio Cuellar
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
| | - Andres J Rodriguez
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
| | - Frank Scholl
- Joe DiMaggio Children's Hospital, Memorial Regional Hospital, Hollywood, Florida, USA
| | - Steven Bibevski
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA.,Joe DiMaggio Children's Hospital, Memorial Regional Hospital, Hollywood, Florida, USA
| | - Lazaro Hernandez
- Joe DiMaggio Children's Hospital, Memorial Regional Hospital, Hollywood, Florida, USA
| | - Vincent Brehier
- Joe DiMaggio Children's Hospital, Memorial Regional Hospital, Hollywood, Florida, USA
| | - Mike Casares
- Joe DiMaggio Children's Hospital, Memorial Regional Hospital, Hollywood, Florida, USA
| | | | - Pablo Morales
- Mannheimer Foundation, Inc., Homestead, Florida, USA
| | - Jesus Lopez
- Mannheimer Foundation, Inc., Homestead, Florida, USA
| | - Joseph Wagner
- Mannheimer Foundation, Inc., Homestead, Florida, USA
| | | | - Arvind Agarwal
- Department of Mechanical and Material Engineering, Florida International University, Miami, Florida, USA
| | - Florence George
- Department of Mathematics and Statistics, Florida International University, Miami, Florida, USA
| | - Sharan Ramaswamy
- Department of Biomedical Engineering and Florida International University, Miami, Florida, USA
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Exergy Analysis of the Heart with a Stenosis in the Arterial Valve. ENTROPY 2019; 21:e21060563. [PMID: 33267277 PMCID: PMC7515053 DOI: 10.3390/e21060563] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 05/20/2019] [Accepted: 06/01/2019] [Indexed: 11/24/2022]
Abstract
In the past decade, several articles have proposed the use of an exergy perspective to analyze physiological systems of the human body under different physical conditions. Such a perspective focuses on the exergy transformations and the efficiency of the biological processes. This may aid the medical field in assessments of a patient’s physical health by means of an index (exergy efficiency) based on the quality of the energy conversion in a given process within the human heart. As a follow-up, a model was developed to describe the evolution of the transvalvular pressure gradient in the aortic valve as a function of stenosis severity. This model was created using physiological data from 40 patients available in the literature, as well as 32 operating points from different bileaflet aortic valve prosthesis. A linear regression results in values around 14.0 kPa for the pressure gradient in the most severe case, evolving from 1.0 kPa for a healthy scenario. The thermodynamic model assesses the irreversibilities associated with energy conversion processes related to metabolism: exergy destroyed at the valves, exergy increased in the flow, and the power of the heart. Results indicate that destroyed exergy reaches values of 10 W (almost 10% of total basal metabolic rate of the whole body). Exergy efficiency is 15% for a healthy heart, decreasing as a function of the severity of the stenosis to values lower than 5%.
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