Cardiovascular Engineering and Technology This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Novel Peripheral Perfusion Dynamics Indices for Detecting and Grading Arterial Stenosis
ConclusionsThe novel method and indices can identify and grade the emulated arterial stenosis with high accuracy and may assist in differentiating between focal arterial stenosis and widespread arterial hardening. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 20, 2023 Category: Cardiology Source Type: research

Impact of Cross-Limb Stent-Graft Configuration on Hemodynamics in Abdominal Aortic Aneurysm Interventional Therapy
ConclusionIn the clinical practice of CL deployment, it is crucial to carefully consider the stent-graft configuration and the patient specific to achieve optimal postoperative outcomes. This study provides valuable insights for guiding stent selection and treatment planning in patients with abdominal aortic aneurysm undergoing CL techniques, from a hemodynamic perspective. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 20, 2023 Category: Cardiology Source Type: research

On the Material Constitutive Behavior of the Aortic Root in Patients with Transcatheter Aortic Valve Implantation
ConclusionsOverall, this study demonstrates the feasibility and potential benefits of using non-invasive imaging techniques and computational modeling to estimate material properties in patients undergoing TAVI. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 20, 2023 Category: Cardiology Source Type: research

Virtual Planning and Patient-Specific Graft Design for Aortic Repairs
ConclusionThe results showed that the comprehensive repair outperforms the simple CoA repair and may be more advantageous in the long term in some patients. We demonstrated that the surgical planning and patient-specific flow simulations could potentially affect the selection and outcomes of aorta repairs. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 20, 2023 Category: Cardiology Source Type: research

In Vivo Material Properties of Human Common Carotid Arteries: Trends and Sex Differences
ConclusionAlthough both material models were able to model in vivo arterial behaviour, the structural model provided more realistic results in the supra-physiological domain. The phenomenological model predicted very high deformations for pressures above the systolic level. However, the phenomenological model has fewer parameters that were shown to be more robust. This is an advantage when only the physiological domain is of interest. The effect of stiffening with age, BMI and blood pressure was present for women, but not always for men. In general, sex had the biggest effect on the mechanical properties of CCAs. Stiffenin...
Source: Cardiovascular Engineering and Technology - November 16, 2023 Category: Cardiology Source Type: research

Evaluation of Wrist-Worn Photoplethysmography Trackers with an Electrocardiogram in Patients with Ischemic Heart Disease: A Validation Study
ConclusionsLow-cost trackers AMAZFIT Cor and Bip validity and reliability were within acceptable ranges, especially during low-intensity exercise among patients with ischemic heart disease recovering from cardiac procedures. Though using the tracker as part of the diagnosis tool still requires more supporting studies, it can potentially be used as a self-monitoring tool with precautions. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 16, 2023 Category: Cardiology Source Type: research

Systematic Analysis of PTFE Monocusp Leaflet Design in a Patient-Based 3D in-Vitro Model of Tetralogy of Fallot
ConclusionsBalancing gradient, regurgitation, and oversizing for growth, a set of leaflet designs have been selected for pre-clinical evaluation. Designs with leaflet widths 140 –160% in the 40% backwall model (110–120% in the 50% backwall), positioned at or 2 mm past the STJ, demonstrated the best results. The next stage ofex-vivo testing will additionally consider native RVOT distensibility, native leaflet interactions, and TAP characteristics. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 16, 2023 Category: Cardiology Source Type: research

Overcoming Uncertainties in Electrogram-Based Atrial Fibrillation Mapping: A Review
AbstractIn clinical rhythmology, intracardiac bipolar electrograms (EGMs) play a critical role in investigating the triggers and substrates inducing and perpetuating atrial fibrillation (AF). However, the interpretation of bipolar EGMs is ambiguous due to several aspects of electrodes, mapping algorithms and wave propagation dynamics, so it requires several variables to describe the effects of these uncertainties on EGM analysis. In this narrative review, we critically evaluate the potential impact of such uncertainties on the design of cardiac mapping tools on AF-related substrate characterization. Literature suggest unce...
Source: Cardiovascular Engineering and Technology - November 14, 2023 Category: Cardiology Source Type: research

Dynamic Coronary Blood Flow Velocity and Wall Shear Stress Estimation Using Ultrasound in an Ex Vivo Porcine Heart
ConclusionWhen implemented in a forward-viewing intravascular ultrasound device, the presented approach will enable dynamic estimation of WSS, an indicator of plaque vulnerability in coronary arteries. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 14, 2023 Category: Cardiology Source Type: research

The Measurement of Bovine Pericardium Density and Its Implications on Leaflet Stress Distribution in Bioprosthetic Heart Valves
ConclusionLeaflet stress distribution and motion in BHVs are influenced by density variations. Establishing an accurate density value for BHV leaflets is imperative for enhancing the computational models, which can ultimately contribute to improved BHV design and outcomes. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 6, 2023 Category: Cardiology Source Type: research

Process Analysis and Parameter Selection of Cardiomyocyte Electroporation Based on the Finite Element Method
ConclusionThis study simulated the electroporation process of cardiomyocyte, and provides a basis for the selection of parameters for the application of PFA for application toward arrhythmias. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - November 2, 2023 Category: Cardiology Source Type: research

Comparison of Machine Learning Algorithms Using Manual/Automated Features on 12-Lead Signal Electrocardiogram Classification: A Large Cohort Study on Students Aged Between 6 to 18 Years Old
ConclusionThis study demonstrated that the manual measurement of 12-Lead ECG features had better performance than the automated measurement (MEANS algorithm), but some classifiers had promising results in discriminating between normal and abnormal cases. Further studies can help us evaluate the applicability and efficacy of machine-learning approaches for distinguishing abnormal ECGs in community-based investigations in both adults and children. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - October 17, 2023 Category: Cardiology Source Type: research

The Investigation of Bio-impedance Analysis at a Wrist Phantom with Two Pulsatile Arteries
ConclusionThis work is the first simulation and phantom investigation into two synchronously pulsatile arteries under BIA in the distal forearm, providing a better insight and understanding in the morphology of measured impedance signals. Future research can accordingly select either a small spacing 4-spot electrode configuration for a single artery sensing or a band electrode configuration for overall pulsatile arteries sensing. A more accurate estimation of blood volume change and pulse wave analysis (PWA) could help to develop cuffless blood pressure measurement (BPM). (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - October 17, 2023 Category: Cardiology Source Type: research

4D Flow Patterns and Relative Pressure Distribution in a Left Ventricle Model by Shake-the-Box and Proper Orthogonal Decomposition Analysis
ConclusionsThis work demonstrated Shake-the-Box is a promising technique to accurately reconstruct the left ventricle flow field in vitro. The good spatial and temporal resolutions of the velocity measurements enabled a 4D reconstruction of the pressure field in the left ventricle. The application of POD analysis showed its potential in reducing the complexity of the high-resolution left ventricle flow measurements. For future work, image analysis, multi-modality flow assessments, and the development of new flow-derived biomarkers can benefit from fast and data-reducing POD analysis. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - October 2, 2023 Category: Cardiology Source Type: research

Comparative Study of Automated Algorithms for Brain Arteriovenous Malformation Nidus Extent Identification Using 3DRA
ConclusionsThe mathematical morphology-based approach showed higher robustness through inter-case variability. The skeleton-based approach leverages the skeleton topomorphology characteristics, while being highly sensitive to anatomical variations and the skeletonisation method employed. Overall, nidus extent identification algorithms are also limited by the quality of the raw volume, as the consequent imprecise vessel segmentation will hinder their results. Performance of the available alternatives remains subpar. This analysis allows for a better understanding of the current limitations. (Source: Cardiovascular Engineering and Technology)
Source: Cardiovascular Engineering and Technology - October 2, 2023 Category: Cardiology Source Type: research