Understanding the healing and remodelling processes induced by myocardial infarction (MI) of the heart is important, and the mechanical properties of the myocardium post-MI can be indicative for effective treatments aimed at avoiding eventual heart failure. MI remodelling is a multiscale feedback process between the mechanical loading and cellular adaptation. In this paper, we use an agent-based model to describe collagen remodelling by fibroblasts regulated by chemical and mechanical cues after acute MI, and upscale into a finite element 3D left ventricular model. We model the dispersed collagen fibre structure using the angular integration method and have incorporated a collagen fibre tension-compression switch in the left ventricle (LV) model. This enables us to study the scar healing (collagen deposition, degradation, and reorientation) of a rat heart post-MI. Our results, in terms of collagen accumulation and alignment, compare well with published experimental data. In addition, we show that different shapes of the MI region can affect the collagen remodelling, and in particular, the mechanical cue plays an important role in the healing process.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6492033 | PMC |
| http://dx.doi.org/10.1002/cnm.3155 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hemodynamic analysis of left ventricular unloading with Impella versus IABP during VA-ECMO.
Acta Bioeng Biomech
June 2024
1Department of Biomedical Engineering, Hefei University of Technology, Hefei, People's Republic of China.
: The utilization of intra-aortic balloon pump (IABP) and Impella has been suggested as means of left ventricular unloading in veno-arterial extracorporeal membrane oxygenation (VA-ECMO) patients. This study aimed to assess the local hemodynamic alterations in VA-ECMO patients through simulation analyses. : In this study, a 0D-3D multiscale model was developed, wherein resistance conditions were employed to define the flow-pressure relationship.
View Article and Find Full Text PDFMinimally Invasive Puncture and Drainage Surgery for the Treatment of Thalamic Hemorrhage Guided by a 3D-printed Guide Plate.
J Craniofac Surg
January 2025
School of Medical Imaging, Hangzhou Medical College, Hangzhou, China.
Thalamic hemorrhage is a type of intracerebral hemorrhage with high disability and mortality rates. Because of its deep bleeding location, irregular shape of the hematoma, and compression of the third ventricle, it is not suitable for craniotomy. This paper reports a case of a 63-year-old male patient who sought medical attention for left-sided basal ganglia and thalamus hemorrhage that broke into the ventricles.
View Article and Find Full Text PDFDiagnostic Utility of Relative Apical Sparing Index in Cardiac Amyloidosis Subtypes: A Comparative Study of Immunoglobulin Light Chain and Transthyretin Amyloid Cardiomyopathy.
Echocardiography
February 2025
Cardiovascular Department, Tokushima University Hospital, Tokushima, Japan.
Background: Speckles tracking echocardiography imaging enables clinicians to detect subtle systolic dysfunction. The aim of the present study was to elucidate the differences in speckle tracking echocardiographic findings between immunoglobulin light chain amyloid cardiomyopathy (AL-CM) and transthyretin amyloid cardiomyopathy (TTR-CM).
Methods: The patients with a confirmed diagnosis of cardiac amyloidosis through cardiac biopsy from March 2013 to October 2022 were included.
Evaluation of Right and Left Ventricular Deformation Analysis in İdiopathic Right Bundle Branch Block by Speckle Tracking Echocardiography.
Echocardiography
February 2025
Cardiology Department, Gazi University Hospital, Yenimahalle, Ankara, Turkey.
Background: Idiopathic right bundle branch block (RBBB) is often seen as harmless and common. However, many studies show it might be linked to negative health outcomes. So, it is crucial to fully understand how RBBB affects the heart's ventricles.
View Article and Find Full Text PDFA case report of a rare cardiac anomaly associated with Ellis-van Creveld syndrome: common atrium, partial atrioventricular septal defect, and hypoplastic left ventricle.
Eur Heart J Case Rep
January 2025
Department of Pediatric Cardiology, Osaka Women's and Children's Hospital, Izumi, Osaka 594-1101, Japan.
Background: A partial atrioventricular septal defect (AVSD) with a hypoplastic left ventricle and common atrium is a rare combination of cardiac anomalies that can be associated with Ellis-van Creveld (EVC) syndrome.
Case Summary: A female neonate with EVC syndrome was diagnosed with an unbalanced AVSD and hypoplastic left ventricle. Pulmonary artery banding and ductus ligation were performed at 23 days after birth.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!