Aortic valve calcium volume as measured by native versus contrast-enhanced computer tomography and the implications for the diagnosis of severe aortic stenosis in TAVR patients with low-gradient aortic stenosis - The Egyptian Heart Journal
Source : https://tehj.springeropen.com/articles/10.1186/s43044-022-00311-8
Background Most of TAVR centers evaluate the calcium score in contrast-enhanced (ce) CT. We compared in this study between different methodologies to measure calcium score. We studied also the difference...
Conclusions: Conclusions: The diagnosis of severe LGAS should not depend on a single parameter as calcium score. In these patients, calcium score should be measured in nc CT and not in ce CT.
Investigation on Imaging Features and Clinical Significance of Cardiac CT in Comprehensive Evaluation of Aortic Valve and Root before Percutaneous Aortic Valve Replacement
Source : https://www.hindawi.com/journals/bmri/2022/5838670/
Medical imaging feature analysis is the basis of medical image processing and analysis. The solution of this problem not only directly affects the successful application of computer graphics and image...
Conclusions: Through the comprehensive evaluation of the aortic valve and root before aortic valve replacement, the analysis of imaging characteristics, and the discussion of clinical significance, compared with the traditional median thoracotomy approach, it is safe and effective. It can reduce the surgical incision and reduce the surgical...
Yield of the electrophysiological study in patients with new-onset left bundle branch block after transcathether aortic valve replacement: The PR interval matters
Source : https://www.frontiersin.org/articles/10.3389/fcvm.2022.910693/full
BackgroundStudies suggest that performing an electrophysiological study (EPS) may be useful to identify patients with new-onset left bundle branch block (LBBB) post-TAVR at risk of atrioventricular block. However, tools to...
Conclusions: PR interval assessment may be useful to select patients with new-onset LBBB after TAVR who may benefit most from an EPS. In patients with PR ≤ 200 ms and ΔPR
Procedural Outcomes of a Self-Expanding Transcatheter Heart Valve in Small Annuli - PubMed
Source : https://pubmed.ncbi.nlm.nih.gov/36142960/
The ACURATE neo/neo2 S subgroup shows a convincing hemodynamic outcome according to low mean gradient even outside the previous IFUs without a relevant increase in the rate of PVL or...
Conclusions: The ACURATE neo/neo2 S subgroup shows a convincing hemodynamic outcome according to low mean gradient even outside the previous IFUs without a relevant increase in the rate of PVL or PPM. In addition to known factors such as annulus area and BMI, potential predictors for PPM are severe annulus calcification and implantation depth....
Role of endothelial CXCR4 in the development of aortic valve stenosis
Source : https://www.frontiersin.org/articles/10.3389/fcvm.2022.971321/full
BackgroundCXCL12/CXCR4 signaling is essential in cardiac development and repair, however, its contribution to aortic valve stenosis (AVS) remains unclear. In this study, we tested the role of endothelial CXCR4 on...
Conclusions: The data collected throughout this study suggest the deletion of CXCR4 in endothelial cells is linked to the development of aortic valve stenosis and left ventricular hypertrophy. The statistically significant parameters measured indicate that endothelial cell CXCR4 plays an important role in aortic valve development and function....