Objective:To investigate the differences in complications after transcatheter aortic valve replacement (TAVR) between patients with pure aortic regurgitation (PAR) and aortic valve stenosis (AS), and to explore the risk factors for the occurrence of major complications.Methods:Totally 124 patients who underwent TAVR at the First Affiliated Hospital of Wannan Medical College between October 2021 and January 2024 were retrospectively included. Patients were divided into the PAR group (64 cases) and AS group (60 cases) based on preoperative echocardiography findings. Preoperative clinical data, echocardiography, CT imaging data,and postoperative complications were collected. The differences between the two groups in postoperative complications and preoperative clinical data, imaging data were compared. Multivariate logistic regression analysis was used to assess the risk factors for major complications in the two groups, receiver operating characteristic (ROC) curve analysis was performed to evaluate the predictive efficacy of major risk factors for common postoperative complications in both groups.Results:The major complication in the PAR group was conduction disturbance (CD, 33 cases); the major complication in the AS group was perivalvular leakage (PVL, 41 cases). Comparison of preoperative data showed that in the PAR group, there were statistically significant differences in the shortest diameter of the membranous septum (MS) and the ratio of the shortest to longest MS diameter between patients with and without postoperative CD (both P<0.05). In the AS group, there were statistically significant differences in the long diameter of the aortic annulus, annular area, annular perimeter, and calcification score of the anchoring zone between patients with and without postoperative PVL (all P<0.05). Multivariate logistic regression analysis revealed that the shortest diameter of the MS was an independent risk factor for postoperative CD in PAR patients ( OR=0.628,95% CI 0.437-0.902, P=0.012), and the area under the ROC curve was 0.751 (95% CI 0.630-0.872, P=0.001). Meanwhile, the calcification score of the anchoring zone was an independent risk factor for postoperative PVL in AS patients ( OR=1.454,95% CI 1.055-2.003, P=0.022), and the area under the ROC curve was 0.740 (95% CI 0.601-0.879, P=0.003). Conclusions:After TAVR, complications differ between PAR and AS patients. CD is the major complication in PAR patients, with the shortest diameter of the MS being a risk factor. Conversely, PVL is the major complication in AS patients, with the calcification score of the anchoring zone identified as a risk factor.

Objective:To investigate the differences in complications after transcatheter aortic valve replacement (TAVR) between patients with pure aortic regurgitation (PAR) and aortic valve stenosis (AS), and to explore the risk factors for the occurrence of major complications.Methods:Totally 124 patients who underwent TAVR at the First Affiliated Hospital of Wannan Medical College between October 2021 and January 2024 were retrospectively included. Patients were divided into the PAR group (64 cases) and AS group (60 cases) based on preoperative echocardiography findings. Preoperative clinical data, echocardiography, CT imaging data,and postoperative complications were collected. The differences between the two groups in postoperative complications and preoperative clinical data, imaging data were compared. Multivariate logistic regression analysis was used to assess the risk factors for major complications in the two groups, receiver operating characteristic (ROC) curve analysis was performed to evaluate the predictive efficacy of major risk factors for common postoperative complications in both groups.Results:The major complication in the PAR group was conduction disturbance (CD, 33 cases); the major complication in the AS group was perivalvular leakage (PVL, 41 cases). Comparison of preoperative data showed that in the PAR group, there were statistically significant differences in the shortest diameter of the membranous septum (MS) and the ratio of the shortest to longest MS diameter between patients with and without postoperative CD (both P<0.05). In the AS group, there were statistically significant differences in the long diameter of the aortic annulus, annular area, annular perimeter, and calcification score of the anchoring zone between patients with and without postoperative PVL (all P<0.05). Multivariate logistic regression analysis revealed that the shortest diameter of the MS was an independent risk factor for postoperative CD in PAR patients ( OR=0.628,95% CI 0.437-0.902, P=0.012), and the area under the ROC curve was 0.751 (95% CI 0.630-0.872, P=0.001). Meanwhile, the calcification score of the anchoring zone was an independent risk factor for postoperative PVL in AS patients ( OR=1.454,95% CI 1.055-2.003, P=0.022), and the area under the ROC curve was 0.740 (95% CI 0.601-0.879, P=0.003). Conclusions:After TAVR, complications differ between PAR and AS patients. CD is the major complication in PAR patients, with the shortest diameter of the MS being a risk factor. Conversely, PVL is the major complication in AS patients, with the calcification score of the anchoring zone identified as a risk factor.

Zn²⁺ is required for the activity of many mitochondrial proteins, which regulate mitochondrial dynamics, apoptosis and mitophagy. However, it is not understood how the proper mitochondrial Zn²⁺ level is achieved to maintain mitochondrial homeostasis. Using Caenorhabditis elegans, we reveal here that a pair of mitochondrion-localized transporters controls the mitochondrial level of Zn²⁺. We demonstrate that SLC-30A9/ZnT9 is a mitochondrial Zn²⁺ exporter. Loss of SLC-30A9 leads to mitochondrial Zn²⁺ accumulation, which damages mitochondria, impairs animal development and shortens the life span. We further identify SLC-25A25/SCaMC-2 as an important regulator of mitochondrial Zn²⁺ import. Loss of SLC-25A25 suppresses the abnormal mitochondrial Zn²⁺ accumulation and defective mitochondrial structure and functions caused by loss of SLC-30A9. Moreover, we reveal that the endoplasmic reticulum contains the Zn²⁺ pool from which mitochondrial Zn²⁺ is imported. These findings establish the molecular basis for controlling the correct mitochondrial Zn²⁺ levels for normal mitochondrial structure and functions.
Animals ; Caenorhabditis elegans/metabolism* ; Cation Transport Proteins/genetics* ; Homeostasis ; Mitochondria/metabolism* ; Zinc/metabolism*

Objective To investigate the effect of coenzyme complex on the cardiac and renal functions of patients with type 2 cardiorenal syndrome. Methods Sixty-two patients with type 2 cardiorenal syndrome were enrolled in from June 2013 to December 2014 in Zhujiang Hospital , Southern Medical University. These patients divided were into routine group (n = 31) and coenzyme complex (n = 31). The therapy scheme of coenzyme complex group was on the basis of routine group with coenzyme complex intravenous drip , 400 U/day for 2 weeks. The cardiac function was determined by New York Heart Function Assessment, and the cardiac ultrasound, the levels of BNP. The renal function was determined by serum creatinine and urine volume. Results Compared with routine group, the rates of NYHA Ⅲ and Ⅳ were reduced, the LVEF levels were increased and the levels of BNP were increased (P < 0.05). The serum creatinine was decreased and urine volume were increased in the coenzyme complex group (P<0.05). Conclusion Coenzyme complex could improve the cardiac and renal functions of the patients with type 2 cardiorenal syndrome.

To optimize the configuration of the conventional SE and FSE sequence parameters in low field MRI. With the combination of larger vision, relatively thinner slice thickness, small number of excitation (NEX = 1 or 2), the signal-to-noise ration and the spatial resolution on follow-up images are moderate, the scan time is significantly shorter along with fewer motion artifacts, the check success rate is improved.
Equipment Design ; Magnetic Resonance Imaging ; instrumentation ; methods

NAS preparation, a kind of Chinese herbal medicine found by the Yunnan Eco-agricultural Research Institute, has potential antiviral activity. In this paper, the inhibiting effect of NAS preparation on H9N2 subtype Avian influenza virus (AIV) was investigated in vivo. Chickens infected with H9N2 virus were treated with NAS preparation for 4 days. The virus was then detected by hemoagglutination (HA) test and reverse transcription polymerase chain reaction (RT-PCR). The results showed that no H9N2 virus could be detected at the 7th day when the chickens were treated with 0.2g/kg/d or 0.1g/kg/d of NAS preparation. However the virus could be detected in other chickens without NAS preparation treatment. This result suggested that NAS preparation may be a potential drug candidate to control infection of H9N2 subtype AIV in chickens.

To study the antiviral effect of Hypericum perforatum L. extract (HPE) on influenza A virus (IAV) (H1N1) in vitro and in vivo. Cytopathic effect (CPE) and neutral red (NR) dye uptake were used to examine the antiviral effect of HPE on Madin Darby Canine Kidney (MDCK) cells which were infected with IAV in vitro. HPE was effective against influenza A virus (IAV) in vitro, with a 50% effective concentration (EC50) of 40 μg/mL. The mean 50% cytotoxic concentration (CC50) in the MDCK used in these experiments was 1.5 mg/mL. Ribavirin was run in parallel with EC50 values of 5.0 μg/mL; the mean CC50 for ribavirin was 520 μg/mL. Oral gavage administrations of HPE or ribavirin to mice infected with the IAV were highly effective in preventing death, slowing the decline of arterial oxygen saturation, inhibiting lung consolidation and reducing lung virus titers. The minimum effective dose of HPE in these studies was 31.25 mg/kg/day, which was administered twice daily for 5 d beginning 4 h prior to virus exposure. Below a dosage of 2000 mg/kg/day, almost all treated mice survived, which suggests that HPE is of low toxicity. Ribavirin's minimum effective dose was 40 mg/kg/day with the LD50 determined to be 200 mg/kg/day. Delay of the initiation of either HPE or ribavirin therapy, using approximately 1/3 LD50 dose each time, could still be protective as late as 48 h after exposure to the IAV. While both agents appeared to have similar efficacy against IAV infections, HPE was considered to be less toxic and may warrant further evaluation as a possible therapy for influenza.