Objective To investigate the prognostic value of acute beart block (AHB) after percutaneous transluminal septal myocardial ablation (PTSMA) in patients with hypertrophic obstructive cardiomyopathy (HOCM). Methods Ninety-four HOCM patients underwent PTSMA were included in this study. Twelve-lead electrocardiograms were obtained during and post PTSMA. Association between clinic events and incidence of post-PTSMA AHB was analyzed. Results AHB was induced in 26 patients by PTSMA and disappeared in 11 patients shortly post PTSMA, subacute intraventricular conduction disturbances was seen in 11 (42.3%), subacute I°AVB in 2(7.7% ) and subacute Ⅲ°AVB in another 2 (7.7%) patients. Among 68 patients without AHB during PTSMA, intraventricular conduction disturbances was evidenced in 14 patients (20.6% ), I°AVB in 2 (2.9% ) and Ⅲ°AVB in 1 patient (1.5%) after PTSMA. AHB patients with subacute heart block were associated with poor prognosis (conduction block duration was 42.00 h) while patients without AHB was associated with benign prognosis even with new onset of subacute heart block (conduction block duration was 7.33 h, P <0.01). Conclusion Patients with AHB during PTSMA are at higher risk for subacute heart block, especially intraventricolar conduction disturbances. AHB patients with subacute heart block were associated with poor prognosis and longer recovery time conducting system.

Objective To clarify the understanding of types of laboratories and manufacturers for GB 9706.1-2020 Medical electrical equipment-Part 1:General requirements for basic safety and essential performance by laboratory proficiency testing for creepage distance and electrical clearance test.Methods An operation guide was formed according to the testing program in GB 9706.1-2020,and the homogeneity and stability of the samples were evaluated according to CNAS-GL003:2018 Guidance on Evaluating the Homogenneity and Stability of Samples Used for Proficiency Testing.Robust statistic methods were used to assess the quantitative parameters of the test results of the participating laboratories according to the requirements in GB/T 28043-2019 Statistical methods for use in proficiency testing by interlaboratory comparison;the results reported by the expert laboratories were used as the specified values of the qualitative parameters.SPSS 25.0 statistical software was used for data analysis.Results All the results of the crreepage distance and electrical clearance tests met the requirements for homogeneity and stability.Of the 46 laboratories involved in,37 ones did have comprehensive satisfactory determinations while the remained 9 ones not.Conclusion Some laboratories don't behave well in understanding the standard,which have to be reformed accordingly to enhance their proficiencies.[Chinese Medical Equipment Journal,2024,45(10):54-59]

OBJECTIVETo investigate the incidence of late onset of hypogonadism (LOH) in males as well as the sensitivity, specificity and applicability of the androgen deficiency in aging males (ADAM) questionnaire and the aging males' symptoms (AMS) scale in Chinese males based on the community population data.

METHODSA total of 1 498 old and middle-aged healthy males attended the ADAM and AMS investigations, of whom 434 received the measurement of the concentration of serum reproductive hormones, the positive rate of LOH screening, the rate of androgen deficiency, the clinical incidence of LOH, and the sensitivity and specificity of ADAM and AMS by tT and fT cut-off. The symptom evaluation cut-off value of the AMS score was optimized using the ROC curve.

RESULTSAlthough 5 of the subjects had previously received irregular testosterone supplement, none of them was given or actively sought for androgen therapy at the time of the investigation. Among the 40 - 69 years old males, the mean positive rates of LOH screening by ADAM and AMS were 80.77% and 32.34%, and the mean androgen deficiency rates obtained by tT and fT cut-off were 14.02% and 43.69%. The mean clinical incidences of LOH in the ADMA- and AMS-positive subjects were 37.85% and 15.42%. According to the fT cut-off, the sensitivities of ADAM and AMS were 86.63% and 35.29%, and their specificities were 24.48% and 63.49%, respectively. The symptom evaluation cut-off value of the AMS score optimized by the ROC curve was 19.5.

CONCLUSIONThe sensitivity and specificity of ADAM and AMS in the Chinese population are basically consistent with the results of most studies abroad, while the positive rate of LOH screening, the rate of androgen deficiency and the clinical incidence of LOH obviously higher in the former than those reported in other studies. Both ADAM and AMS are applicable to the Chinese population. The former is advantageous for its high sensitivity, time saving and easy operation, and therefore suitable for screening LOH, while the latter can be used for monitoring therapeutic efficacy.

Adult ; Aged ; Asian Continental Ancestry Group ; Humans ; Hypogonadism ; diagnosis ; Male ; Mass Screening ; methods ; Middle Aged ; Sensitivity and Specificity ; Surveys and Questionnaires

OBJECTIVETo investigate whether ginsenoside-Rb1 (Gs-Rb1) inhibits the apoptosis of hypoxia cardiomyocytes by up-regulating apelin-APJ system and whether the system is affected by hypoxia-induced factor 1α (Hif-1α).

METHODSNeonatal rat cardiomyocytes were randomly divided into 6 groups: a control group, a simple CoCl group, a simple Gs-Rb1 group, a CoCl and Gs-Rb1 hypoxia group, a CoCl and 3-(5'-hydroxymethyl-2'-furyl)-1-benzylindazole (YC-1) group, a CoCl and YC-1 group and a Gs-Rb1 group, in which YC-1 inhibits the synthesis and accelerates the degradation of Hif-1a. The concentration of CoCl, Gs-Rb1 and YC-1 was 500 μmol/L, 200 μmol/L and 5 μmol/L, respectively; the apoptosis ratio was analyzed with a flow cytometer; and apelin, APJ and Hif-1α were assayed with immunocytochemistry, Western blot assays and reverse transcription polymerase chain reaction (RT-PCR).

RESULTS(1) The anti-apoptosis effect of Gs-Rb1 on hypoxia cardiomyocytes was significantly inhibited by YC-1; (2) Hypoxia significantly up-graded the expression of mRNA and protein of apelin; this effect was further reinforced by Gs-Rb1 and significantly inhibited by YC-1; (3) Gs-Rb1 further strengthened the expression of APJ mRNA and APJ proteins once hypoxia occurred, which was significantly inhibited by YC-1; (4) Gs-Rb1 significantly increased the expression of Hif-1α, which was completely abolished by YC-1; (5) There was a negative relationship between AR and apelin (or APJ, including mRNA and protein), a positive correlation between apelin (or APJ) protein and Hif-1a protein, in hypoxia cardiomyocytes.

CONCLUSIONThe apelin-APJ system plays an important role in the anti-apoptosis effect of Gs-Rb1 on hypoxia neonatal cardiomyocytes, which was partly adjusted by Hif-1α.

Animals ; Animals, Newborn ; Apelin ; Apelin Receptors ; Cell Hypoxia ; drug effects ; Ginsenosides ; pharmacology ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Immunohistochemistry ; Intercellular Signaling Peptides and Proteins ; genetics ; metabolism ; Myocytes, Cardiac ; cytology ; drug effects ; metabolism ; RNA, Messenger ; genetics ; metabolism ; Rats, Wistar ; Receptors, G-Protein-Coupled ; metabolism

OBJECTIVETo evaluate the results of video-assisted thoracoscopic extended thymectomy for myasthenia gravis.

METHODSWe retrospectively reviewed data from 107 patients received thoracoscopic extended thymectomy from June 1995 to June 2004. All patients had confirmed diagnosis of myasthenia gravis by clinical manifestation and electromyogram. Thoracoscopic extended thymectomy as well as dissection of all fatty tissue anterior to the pericardium was performed.

RESULTSDuring a follow-up of 1-98 months, symptom was significantly improved in 83% of patients, including 34 patients experienced complete remission. There was no postoperative mortality.

CONCLUSIONFavorable results of video-assisted thoracoscopic extended thymectomy can be achieved in patients with myasthenia gravis. The technique is safe and minimally invasive.

Adolescent ; Adult ; Aged ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Myasthenia Gravis ; surgery ; Retrospective Studies ; Thoracic Surgery, Video-Assisted ; Thymectomy ; methods ; Treatment Outcome

BACKGROUNDLupus hepatitis is yet to be characterized based on its clinical features and is often difficult to differentially diagnose from other liver diseases. We aimed to elucidate clinical, histopathological and immunopathological features of lupus hepatitis and to evaluate primarily the effectiveness of liver immunopathological manifestations on differential diagnosis of lupus hepatitis from other liver diseases.

METHODSA retrospective study was performed to analyze clinical features of lupus hepatitis in 47 patients out of 504 inpatients with systemic lupus erythematosus (SLE) in First Affiliated Hospital of Sun Yat-sen University, China from May 2006 to July 2009, and to evaluate the association between lupus hepatitis and SLE activity. Additionally, liver histopathological changes by hematoxylin and eosin (HE) staining and immunopathological changes by direct immunofluorescence test in 10 lupus hepatitis cases were analyzed and compared to those in 16 patients with other liver diseases in a prospective study.

RESULTSOf 504 SLE patients, 47 patients (9.3%) were diagnosed to have lupus hepatitis. The prevalence of lupus hepatitis in patients with active SLE was higher than that in those with inactive SLE (11.8% vs. 3.2%, P < 0.05). The incidence of hematological abnormalities in patients with lupus hepatitis was higher than that in those without lupus hepatitis (40.4% vs. 21.7%, P < 0.05), such as leucocytes count (2.92×10(9)/L vs. 5.48×10(9)/L), platelets count (151×10(9)/L vs. 190×10(9)/L), serum C3 and C4 (0.34 g/L vs. 0.53 g/L; 0.06 g/L vs. 0.09 g/L) (P < 0.05); 45 of 47 (95.7%) lupus hepatitis patients showed 1 upper limit of normal (ULN) < serum ALT level < 5 ULN. The liver histopathological features in patients with lupus hepatitis were miscellaneous and non-specific, similar to those in other liver diseases, but liver immunopathological features showed positive intense deposits of complement 1q in 7/10 patients with lupus hepatitis and negative complement 1q deposits in all patients with other liver diseases (Fisher's exact test, P = 0.011).

CONCLUSIONSLupus hepatitis was not infrequent in active SLE patients which would be one of the indices indicating SLE activity. Positive intense deposit of complement 1q in liver may be a characteristic immunopathological feature of lupus hepatitis, which provides a new way to differentially diagnose lupus hepatitis from other liver diseases.

Adolescent ; Adult ; Aged ; Child ; Cohort Studies ; Complement C1q ; analysis ; Female ; Hepatitis, Autoimmune ; etiology ; immunology ; pathology ; Humans ; Liver ; pathology ; Lupus Erythematosus, Systemic ; complications ; Male ; Middle Aged ; Retrospective Studies

OBJECTIVETo observe the effect of chronic lead contaminant on protein expression of protein kinase (PKC) and calmodulin (CaM) in hippocampus of baby-rats.

METHODSThe Wistar pregnant rats were randomly divided into 3 groups fed with distilled water and lead-contained water (0.2% and 1.0% lead acetate) respectively. The lead exposure period ranged from the 0 day of pregnancy to the offspring weaned. Then the baby-rats were fed with lead water the same as their mothers. Pups were killed at postnatal day 8 and 50 respectively. Atomic absorption spectrometry was used to determine lead content of rats' brain. Western-blotting was used to observe protein expression of PKC and CaM in hippocampus of baby-rats.

RESULTSThe brain lead content of test groups was much higher than that of the control group in the same growth period (P < 0.01). The content of brain lead in rats of postnatal day 50 was significantly higher than that of rats of postnatal day 8 (P < 0.01). Compared with control group, PKC and CaM protein expressions of chronic lead exposure baby-rats in the hippocampus were down trend (P < 0.05).

CONCLUSIONThe decrease of PKC and CaM protein expression level in hippocampus might be one of the molecular mechanisms of lead induced impairment of learning and memory.

Animals ; Calmodulin ; metabolism ; Female ; Hippocampus ; drug effects ; metabolism ; Lead ; toxicity ; Male ; Pregnancy ; Prenatal Exposure Delayed Effects ; Protein Kinase C ; metabolism ; Rats ; Rats, Wistar

OBJECTIVETo investigate the relationship between the mRNA expression levels of p53-mediating DNA damage and repair genes in the peripheral blood lymphocytes of workers and their exposures to benzene in their working environment.

METHODSThe mRNA expression levels of p53 and related genes were determined by SYBR Green I chimeric fluorescence quantitative real-time RT-PCR analysis in peripheral blood lymphocytes of 72 workers, who were classified into group A (46 direct exposure to benzene) and group B (26 indirect exposure to benzene) based on their positions, and 29 controls. The differences of gene expression levels were analyzed by software REST 2005. Meanwhile, the peripheral blood leukocytes, hemoglobin and platelet of workers and controls were counted. Benzene content was measured in the samples of toluene, used as raw material, and spraying agents and benzene, toluene and xylene concentrations in the air of workplaces were monitored.

RESULTSThere were no significant differences in the mRNA expression levels of p53, Ku80, Ape1 and Mdm-2 between group A or group B and control group (P > 0.05). The expression up-regulation of p21 mRNA was found, but without significant difference (P > 0.05). However, the mRNA expression levels of Rad51, Bcl-2, Bax, Xpa and Xpc in group A and Rad51 in group B were downregulated significantly (P < 0.05 or P < 0.01). Moreover, both the counts of white blood cell, hemoglobin and platelet in group A were (4.93 +/- 1.27) x 10(9)/L, (123.97 +/- 11.80) g/L and (124.02 +/- 41.22) x 10(9)/L respectively and platelet in group B (135.80 +/- 39.44) x 10(9)/L were significantly lower than in control group (P < 0.05 or P < 0.01).

CONCLUSIONThe mRNA expression levels of some p53-mediating DNA damage and repair genes are downregulated in the workers chronically exposed to low benzene concentration. The working environment impacts on health of group A workers are greater than the ones of group B.

Adult ; Benzene ; adverse effects ; DNA Damage ; DNA Repair ; Female ; Humans ; Lymphocytes ; drug effects ; metabolism ; Male ; Occupational Exposure ; adverse effects ; RNA, Messenger ; genetics ; Tumor Suppressor Protein p53 ; genetics ; metabolism ; Young Adult

OBJECTIVE: To explore the characteristics of autopsy cases of anaphylactic shock induced by cephalosporins and provide the evidences in forensic medicine. METHODS: Twenty cases of anaphylactic shock induced by cephalosporins were collected from April 2005 to August 2009 in judicial expertise center of China Medical University, and the characteristics of the cases were analyzed retrospectively. RESULTS: The age of decedents ranged from 40 to 60 years. Ninety percent of cases were from local medical centers and private clinics. The symptoms of the shock appeared 30 s-150 min after the administration of the drug, and death occurred 10 min-210 min after the appearance of the shock symptoms. In all cases, various degrees of eosinophil infiltration were observed in trachea and the lungs. Serum IgE detected by ELISA method was normal value in 14 cases. CONCLUSION In fatal anaphylactic cases, little specific findings are detected during postmortem and microscope examination. For this reason, the determination of cause of death in these cases requires comprehensive analysis combined with clinic information and excludes other diseases leading to the sudden death.
Adolescent ; Adult ; Anaphylaxis/pathology* ; Anti-Bacterial Agents/adverse effects* ; Autopsy ; Cause of Death ; Cephalosporins/adverse effects* ; Child ; Child, Preschool ; Drug Hypersensitivity/pathology* ; Edema/pathology* ; Female ; Forensic Pathology ; Humans ; Immunoglobulin E/blood* ; Infant ; Infusions, Intravenous ; Larynx/pathology* ; Lung/pathology* ; Male ; Middle Aged ; Retrospective Studies ; Trachea/pathology* ; Young Adult

Adult ; Aged ; Bevacizumab ; therapeutic use ; Brain Neoplasms ; drug therapy ; therapy ; Edema ; drug therapy ; etiology ; Female ; Humans ; Male ; Middle Aged ; Re-Irradiation ; adverse effects