Risk factors and predictive model for moderate to severe perivalvular leakage following transcatheter aortic valve replacement.

Objective: To identify the risk factors associated with moderate to severe perivalvular leakage (PVL) after transcatheter aortic valve replacement (TAVR) and to construct a prediction model for this risk.

Methods: A retrospective analysis was conducted on 128 patients with severe aortic stenosis who had received TAVR in The Second Hospital of Hebei Medical University from January 2019 to January 2024. The length of the aortic regurgitation bundle and annular circumference ratio were measured by transesophageal echocardiography immediately after the valve implantation.

Modular probe integrating with quantum dots based versatile platform for sensitive and label-free biomarker detection.

Multiplexed analysis of biomarkers in a single sample tube is essential for accurate diagnosis and therapy of diseases. However, the existing detection platforms suffer from many drawbacks, such as low specificity, limited applicable sceneries, and complicated operation. Hence, it is highly important to develop a versatile biomarker detection platform that can be used for disease diagnosis and pathophysiological research.

Retrospective analysis of Advanced Heart Failure and/or Cardiogenic Shock in Patients with Aortic Valve Stenosis Treated by Transcatheter Aortic Valve Replacement and a Nomogram Model Construction.

Objective: Currently, there is little information about the risk of sudden cardiac death and its predictors in aortic valve stenosis patients after transcatheter aortic valve replacement (TAVR). Therefore, we conducted a large sample cohort study on TAVR patients to evaluate the predictive factors and incidence of heart failure death caused by advanced heart failure (AHF) and sudden cardiac death. Furthermore, a nomogram model to predict its risk was constructed.

Effects of Astragalus polysaccharides on memory impairment in a diabetic rat model.

Objective: Astragalus polysaccharides (APS) are active constituents of Astragalus membranaceus. In this study, we aimed to investigate the effects of APS on memory impairment in a diabetic rat model and their mechanisms.

Methods: A diabetic model was established in 50 male Wistar rats with streptozotocin intra-peritoneal injection.