Dilated cardiomyopathy(DCM)has a concealed onset with left or even whole heart enlargement as the main imaging manifestation.It is a common primary disease of heart failure and arrhythmia.With the continuous deepening of research in recent years,the intrinsic molecular mechanism of regulatory cell death(RCD)has gradually become clear.Researchers have found that the RCD mode plays a very important role in the occurrence and development of DCM.At present,the RCD modes involved in DCM mainly include apoptosis,necrotic apoptosis,pyroptosis,iron death,autophagy,and cuproptosis,and a certain correlation exists among them,which interact and regulate each other.This article provides an overview of the current research status on the mechanisms of the six RCD modes involved in DCM to provide a reference for future basic research and clinical applications.

Humans ; Atrial Fibrillation/surgery* ; Left Atrial Appendage Closure ; Heart Atria/surgery* ; Catheter Ablation/methods* ; Atrial Appendage/surgery* ; Treatment Outcome

Objective:To investigate the value of number of negative lymph nodes (NLNs) in predicting the prognosis of patients with esophageal cancer after neoadjuvant therapy and the construction of nomogram prodiction model.Methods:The retrospective cohort study was conducted. The clinicopathological data of 1 924 patients with esophageal cancer after neoadjuvant therapy uploaded to the Surveillance, Epidemiology, and End Results Database of the National Cancer Institute from 2004 to 2015 were collected. There were 1 624 males and 300 females, aged 63 (range, 23?85)years. All 1 924 patients were randomly divided into the training dataset of 1 348 cases and the validation dataset of 576 cases with a ratio of 7:3 based on random number method in the R software (3.6.2 version). The training dataset was used to constructed the nomogram predic-tion model, and the validation dataset was used to validate the performance of the nomogrram prediction model. The optimal cutoff values of number of NLNs and number of examined lymph nodes (ELNs) were 8, 14 and 10, 14, respectively, determined by the X-tile software (3.6.1 version), and then data of NLNs and ELNs were converted into classification variables. Observation indicators: (1) clinicopathological characteristics of patients in the training dataset and the validation dataset; (2) survival of patients in the training dataset and the validation dataset; (3) prognostic factors analysis of patients in the training dataset; (4) survival of patients in subgroup of the training dataset; (5) prognostic factors analysis in subgroup of the training dataset; (6) construction of nomogram prediction model and calibration curve. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribution were represented as M(range), and comparison between groups was conducted using the Mann-Whitney U test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi-square test. The Kaplan-Meier method was used to draw survival curve and Log-Rank test was used for survival analysis. The COX proportional hazard model was used for univariate and multivariate analyses. Based on the results of multivariate analysis, the nomogram prediction model was constructed. The prediction efficacy of nomogram prediction model was evaluated using the area under curve (AUC) of the receiver operating characteristic curve and the Harrell′s c index. Errors of the nomogram prediction model in predicting survival of patients for the training dataset and the validation dataset were evaluated using the calibration curve. Results:(1) Clinicopathological characteristics of patients in the training dataset and the validation dataset. There was no significant difference in clinicopatholo-gical characteristics between the 1 348 patients of the training dataset and the 576 patients of the validation dataset ( P>0.05). (2) Survival of patients in the training dataset and the validation dataset. All 1 924 patients were followed up for 50(range, 3?140)months, with 3-year and 5-year cumulative survival rate as 59.4% and 49.5%, respectively. The 3-year cumulative survival rate of patients with number of NLNs as <8, 8?14 and >14 in the training dataset was 46.7%, 62.0% and 66.0%, respectively, and the 5-year cumulative survival rate was 38.1%, 52.1% and 59.7%, respectively. There was a significant difference in the survival of these patients in the training dataset ( χ2=33.70, P<0.05). The 3-year cumulative survival rate of patients with number of NLNs as <8, 8?14 and >14 in the validation dataset was 51.1%, 54.9% and 71.2%, respectively, and the 5-year cumulative survival rate was 39.3%, 42.5% and 55.7%, respectively. There was a significant difference in the survival of these patients in the validation dataset ( χ2=14.49, P<0.05). The 3-year cumulative survival rate of patients with number of ELNs as <10, 10?14 and >14 in the training dataset was 53.9%, 60.0% and 62.7%, respectively, and the 5-year cumulative survival rate was 44.7%, 49.1% and 56.9%, respectively. There was a significant difference in the survival of these patients in the training dataset ( χ2=9.88, P<0.05). The 3-year cumulative survival rate of patients with number of ELNs as <10, 10?14 and >14 in the validation dataset was 56.2%, 47.9% and 69.3%, respectively, and the 5-year cumula-tive survival rate was 44.9%, 38.4% and 51.9%, respectively. There was a significant difference in the survival of these patients in the validation dataset ( χ2=9.30, P<0.05). (3) Prognostic factors analysis of patients in the training dataset. Results of multivariate analysis showed that gender, neoadjuvant pathological (yp) T staging, ypN staging (stage N1, stage N2, stage N3) and number of NLNs (8?14, >14) were independent influencing factors for the prognosis of patients with esophageal cancer after neoadjuvant therapy ( hazard ratio=0.65, 1.44, 1.96, 2.41, 4.12, 0.69, 0.56, 95% confidence interval as 0.49?0.87, 1.17?1.78, 1.59?2.42, 1.84?3.14, 2.89?5.88, 0.56?0.86, 0.45?0.70, P<0.05). (4) Survival of patients in subgroup of the training dataset. Of the patients with NLNs in the training dataset, the 3-year cumulative survival rate of patients with number of NLNs as <8, 8?14 and >14 was 61.1%, 71.6% and 76.8%, respectively, and the 5-year cumulative survival rate was 50.7%, 59.9% and 70.1%, respectively. There was a significant difference in the survival of these patients in the training dataset ( χ2=12.66, P<0.05). Of the patients with positive lymph nodes in the training dataset, the 3-year cumulative survival rate of patients with number of NLNs as <8, 8?14 and >14 was 26.1%, 42.9% and 44.7%, respectively, and the 5-year cumulative survival rate was 20.0%, 36.5% and 39.3%, respectively. There was a significant difference in the survival of these patients in the training dataset ( χ2=20.39, P<0.05). (5) Prognostic factors analysis in subgroup of the training dataset. Results of multivariate analysis in patients with NLNs in the training dataset showed that gender, ypT staging and number of NLNs (>14) were independent influencing factors for the prognosis of patients with esophageal cancer after neoadju-vant therapy ( hazard ratio=0.67, 1.44, 0.56, 95% confidence interval as 0.47?0.96, 1.09?1.90, 0.41?0.77, P<0.05). Results of multi-variate analysis in patients with positive lymph nodes in the training dataset showed that race as others, histological grade as G2, ypN staging as stage N3 and number of NLNs (8?14, >14) were independent influencing factors for the prognosis of patients with esophageal cancer after neoadjuvant therapy ( hazard ratio=2.73, 0.70, 2.08, 0.63, 0.59, 95% confidence interval as 1.43?5.21, 0.54?0.91, 1.44?3.02, 0.46?0.87, 0.44?0.78, P<0.05). (6) Construction of nomogram prediction model and calibration curve. Based on the multivariate analysis of prognosis in patients of the training dataset ,the nomogram prediction model for the prognosis of patients with esophageal cancer after neoadju-vant treatment was constructed based on the indicators of gender, ypT staging, ypN staging and number of NLNs. The AUC of nomogram prediction model in predicting the 3-, 5-year cumulative survival rate of patients in the training dataset and the validation dataset was 0.70, 0. 70 and 0.71, 0.71, respectively. The Harrell′s c index of nomogram prediction model of patients in the training dataset and the validation dataset was 0.66 and 0.63, respectively. Results of calibration curve showed that the predicted value of the nomogram prediction model of patients in the training dataset and the validation dataset was in good agreement with the actual observed value. Conclusion:The number of NLNs is an independent influencing factor for the prognosis of esophageal cancer patients after neoadjuvant therapy, and the nomogram prediction model based on number of NLNs can predict the prognosis of esophageal cancer patients after neoadjuvant therapy.

Resection is one of the most important treatments for esophageal squamous cell carcinoma, and routine postoperative follow-up is an effective method for early detection and treatment of recurrent metastases, which can improve patients' quality of life and prognosis. This consensus aims to provide a reference for colleagues responsible for postoperative follow-up of esophageal squamous cell carcinoma patients in China, and further improve the standardization of the diagnosis and treatment of esophageal squamous cell carcinoma.

Esophageal cancer is one of the common malignant tumors in the worldwide and has regional characteristics in China. At present, the treatment of esophageal cancer is still a comprehensive diagnosis and treatment mode based on surgery. With the application of minimally invasive technique in surgery of esophageal cancer, the concept of surgical diagnosis and treatment for esophageal cancer is constantly updating. The application of robotic surgical system in esophageal surgery promotes the surgical quality of lymph node dissection and improves the technique of intraluminal anastomosis under total endoscopy. For locally advanced esophageal cancer, a diagnosis and treatment mode based on neoadjuvant therapy has been gradually accepted by most of doctors around China. Combined with the latest researches at home and abroad, the authors investigate the development of surgical techniques, the renewal of surgical concept and the changes on diagnosis and treatment, summarize the new advances in comprehensive surgical treatment for esophageal cancer, in order to provide the theoretical guidance for the standardized treatment of esophageal cancer.

Objective:To explore the effect of small private blended teaching combined with guided feedback in the training of specialist nurses in Operating Room.Methods:The cluster sampling was used to select 62 trainees who participated in the training of specialist nurses in Operating Room of the First Affiliated Hospital of Zhengzhou University in 2019 and 2020 as the research object. The trainees in 2019 and 2020 were divided into the control group ( n=32) and the experimental group ( n=30) . The experimental group adopted the small private online course (SPOC) teaching method combined with guided feedback, and the control group adopted the traditional teaching method. After the training, the two teaching methods were evaluated by theoretical assessment, operational assessment and self-designed questionnaires. Results:The theoretical knowledge, surgical safety verification, and surgical position placement scores of the specialist nurses in Operating Room of the experimental group were (89.90±3.92) , (91.37±3.57) , (92.03±2.98) , and the scores of the control group were (87.44±3.06) , (88.53±4.23) , (87.28±3.10) respectively, and the differences between the two groups were statistically significant ( P<0.05) . The students in the experimental group had a good evaluation of the effect of the SPOC teaching method combined with guided feedback, and their satisfaction was over 90%. Conclusions:The SPOC teaching method combined with guided feedback can improve the theoretical knowledge and operational ability of specialist nurses in Operating Room, and enhance the enthusiasm of students to learn, cultivate clinical thinking ability and humanistic care consciousness. The training effect is better than traditional teaching method, which is helpful to improve the teaching quality of specialized nursing in Operating Room.

Objective:To evaluate the clinical effect of applying peroneal artery perforator flap with super-draining techniques in repairing skin defects of extremities.Methods:The data of patients with limb wounds admitted to the 990th Hospital of the Joint Logistics Support Force of the People’s Liberation Army from March 2014 to August 2019 were analyzed retrospectively. All were repaired with peroneal artery perforator flaps with super-draining techniques.Cutaneous nerves and perforating vessels were anastomosed according to the routine ratio of 1∶2.The superficial vein and the recipient veinwere matched and marked according to the relative position the diameter and length.Then one to three superficial veins were anastomosed in sequence according to the vein mark number.Upper limb wounds were evaluated by the trial standard of upper limb function evaluation of the Hand Surgery Branch of the Chinese Medical Association.Patients with lower limb wounds were evaluated by the American Orthopaedic Foot and Ankle Surgery Association Ankle-Hindfoot Score System.All patients were evaluated according to the sensory function evaluation standard of the British Medical Research Association.Results:A total of 67 cases were included in this cohort. There were 54 males and 13 females, aged from 21 to 65 years, with an average of 44 years.Eight cases were anastomosed with three superficial veins, 38 cases were anastomosed with two flaps, and 21 cases were anastomosed with one flap.The donor sites were closed directly in 56 cases.Eleven cases received full-thickness skin grafting to cover the donor site.One case showed necrosis of the half flap for the arterial crisis. The wound was repaired by full-thickness skin grafting in further treatment. Three cases had hemorrhage under the free flap, which was healed secondarily after debridement. The remaining were healed well.All patients were followed for 6 to 44 months. There was no obvious swelling and blisters in the early postoperative period.The texture of the flap was the same as the surrounding area.In the later stage, the atrophy and scar were not obvious, without pigmentation. The sensation recovered quickly. The donor site healed without dysfunction.Sixteen patients with upper limb wounds were evaluated by the trial standard of upper limb function evaluation of the Chinese Medical Association Hand Surgery Branch. Twelve cases were excellent, 3 cases were good, and one case was fair. Fifty-one cases of lower limb wounds were evaluated by the American Orthopaedic Foot and Ankle Surgery Association Ankle-Hind Foot Score System. Thirty-eight cases were excellent, 11 cases were good, and two cases were fair. All patients were evaluated according to the sensory function evaluation standard of the British Medical Research Association. The two-point distance discrimination was 8-10 mm, with an average of 9.1 mm. The sensory function of the flaps reached S3+ in 48 cases and S3 in 19 cases.Conclusions:Application of super-draining technique in peroneal artery perforator flap surgery can effectively prevent blood congestion and reduce the necrosis risk of the free flap and complication rate. It can improve the survival quality of the flap and facilitate the recovery of the function of the receiving area.

Objective:To evaluate the clinical effect of applying peroneal artery perforator flap with super-draining techniques in repairing skin defects of extremities.Methods:The data of patients with limb wounds admitted to the 990th Hospital of the Joint Logistics Support Force of the People’s Liberation Army from March 2014 to August 2019 were analyzed retrospectively. All were repaired with peroneal artery perforator flaps with super-draining techniques.Cutaneous nerves and perforating vessels were anastomosed according to the routine ratio of 1∶2.The superficial vein and the recipient veinwere matched and marked according to the relative position the diameter and length.Then one to three superficial veins were anastomosed in sequence according to the vein mark number.Upper limb wounds were evaluated by the trial standard of upper limb function evaluation of the Hand Surgery Branch of the Chinese Medical Association.Patients with lower limb wounds were evaluated by the American Orthopaedic Foot and Ankle Surgery Association Ankle-Hindfoot Score System.All patients were evaluated according to the sensory function evaluation standard of the British Medical Research Association.Results:A total of 67 cases were included in this cohort. There were 54 males and 13 females, aged from 21 to 65 years, with an average of 44 years.Eight cases were anastomosed with three superficial veins, 38 cases were anastomosed with two flaps, and 21 cases were anastomosed with one flap.The donor sites were closed directly in 56 cases.Eleven cases received full-thickness skin grafting to cover the donor site.One case showed necrosis of the half flap for the arterial crisis. The wound was repaired by full-thickness skin grafting in further treatment. Three cases had hemorrhage under the free flap, which was healed secondarily after debridement. The remaining were healed well.All patients were followed for 6 to 44 months. There was no obvious swelling and blisters in the early postoperative period.The texture of the flap was the same as the surrounding area.In the later stage, the atrophy and scar were not obvious, without pigmentation. The sensation recovered quickly. The donor site healed without dysfunction.Sixteen patients with upper limb wounds were evaluated by the trial standard of upper limb function evaluation of the Chinese Medical Association Hand Surgery Branch. Twelve cases were excellent, 3 cases were good, and one case was fair. Fifty-one cases of lower limb wounds were evaluated by the American Orthopaedic Foot and Ankle Surgery Association Ankle-Hind Foot Score System. Thirty-eight cases were excellent, 11 cases were good, and two cases were fair. All patients were evaluated according to the sensory function evaluation standard of the British Medical Research Association. The two-point distance discrimination was 8-10 mm, with an average of 9.1 mm. The sensory function of the flaps reached S3+ in 48 cases and S3 in 19 cases.Conclusions:Application of super-draining technique in peroneal artery perforator flap surgery can effectively prevent blood congestion and reduce the necrosis risk of the free flap and complication rate. It can improve the survival quality of the flap and facilitate the recovery of the function of the receiving area.

Objective: To understand the current situation and associated factors of myopia in junior middle school students, and to provide scientific basis for prevention and control of myopia in junior middle school students. Methods: A total of 5 393 junior middle school students were selected from middle schools in Guangdong, Guangxi, Guizhou, Liaoning, Shandong, Shanxi provinces. The visual acuity of middle school students was examined, and the data of general population, economy, sociology and natural environment were obtained through statistical yearbook of each province. The influencing factors of myopia of middle school students were analyzed by univariate and multivariate Logistic regression. Results: The results of single factor analysis showed that the myopia rate of junior high school students was different by gender, grades, parents average wage, sunshine duration, temperature, altitude, longitude and latitude(χ2=47.76，59.05，10.79，106.19，53.56，85.02，76.23，107.07，P<0.05). The results of multi factor analysis showed that gender, grade, average wage, temperature and latitude was positively associated with myopia vision; sunshine duration and longitude were negatively associated with the risk for myopia(OR=1.54，1.34，1.62，7.58，27.10，0.42，0.39，P<0.05). Conclusion The myopia of junior high school students is affected by a variety of factors, economic and social factors and natural environmental factors have an impact on the screening of sexual myopia in junior high school students. Economic and social factors and natural environmental factors should be taken into account in the formulation of myopia prevention and control measures.

Alzheimer′s disease is the most common neurodegenerative disease, which is characterized by the formation of neurofibrillary tangles and amyloid plaques in the brain, and the progressive loss of neurons. Epidemiological studies found that exposure to organophosphorus compounds increases the incidence of Alzheimer′s disease. Organophosphorus compounds accelerate the onset of Alzheimer′s disease pathology by inhibiting enzyme activity, promoting oxidative stress, and affecting axonal transport and nerve growth factor pathway. As a result, they cause cognitive dysfunction. Here we reviewed the current knowledge on the role of organophosphorus compounds in the pathogenesis of Alzheimer′s disease, in order to enhance our understanding of the environmental risk factors that contribute to the pathogenesis of Alzheimer′s disease, and to search for potential therapeutic targets for this disease.