1.Chufeng Yisuntang Ameliorates PM2.5-induced Dry Eye via ROS/p38 MAPK Signaling Pathway
Yuan ZHONG ; Pan ZHAO ; Shi TAN ; Yu TANG ; Dongdong LI ; Lihao CHEN ; Jun PENG ; Qinghua PENG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):191-200
ObjectiveTo establish a mouse model of particulate matter 2.5 (PM2.5)-induced dry eye and investigate whether Chufeng Yisuntang can ameliorate the PM2.5-induced ocular surface damage by regulating the reactive oxygen species (ROS)/p38 mitogen-activated protein kinase (p38 MAPK) signaling pathway. MethodsSixty 8-week-old male C57BL/6J mice were used. Ten were randomly selected as the control group. The remaining 50 mice received topical instillation of 1 drop (0.1 mL) of 5 g·L-1 PM2.5 suspension in both eyes, four times daily. Successfully modeled mice were randomized into four groups (n=10): Model, p38 MAPK inhibitor, Chufeng Yisuntang, and combination (Chufeng Yisuntang at 7.3 g·kg-1 + p38 MAPK inhibitor SB203580 at 5 mg·kg-1). Chufeng Yisuntang was administered via gavage, and the inhibitor group via intraperitoneal injection. The control and model groups received equal volumes of distilled water by gavage. All treatments lasted for 4 weeks. General conditions were dynamically observed. Tear secretion, tear film break-up time, and corneal fluorescein staining were assessed. After intervention for 4 weeks, hematoxylin and eosin (HE) staining was used to examine the histopathological changes. Enzyme-linked immunosorbent assay (ELISA) was adopted to measure serum levels of ROS, malondialdehyde (MDA), superoxide dismutase (SOD) 1, and SOD2. Western blot and Real-time PCR were employed to determine the protein and gene levels, respectively, of p38 MAPK, B-cell lymphoma-2 (Bcl-2), Bcl-2-associated X protein (Bax), and cysteinyl aspartate-specific proteinase-3 (Caspase-3) in the corneal tissue. ResultsCompared with the control group, the model group exhibited reduced tear secretion volume and tear film breakup time, along with increased corneal fluorescein staining scores (P<0.01). Compared with the model group, the Chufeng Yisuntang group, p38 MAPK inhibitor group, and combination group demonstrated increased tear secretion volume and tear film breakup time, along with decreased corneal fluorescein staining scores (P<0.01). HE staining revealed that compared with the control group, the model group exhibited marked increases in corneal epithelial cell layers and epithelial thickness, along with reduced meibomian gland acini and intensely stained, densely packed nuclei around the acini. Compared with the model group, the Chufeng Yisuntang group, p38 MAPK inhibitor group, and combination group showed intact corneal structure, improved cell morphology, and reduced damage severity. ELISA revealed elevated ROS and MDA levels (P<0.01) and decreased SOD1 and SOD2 levels (P<0.01) in the model group compared with the control group. Compared with the model group, Chufeng Yisuntang, p38 MAPK inhibitor, and the combination lowered ROS and MDA levels (P<0.01), while raising SOD1 and SOD2 levels (P<0.05, P<0.01). Western blot revealed that compared with the control group, the model group exhibited increased protein levels of p38 MAPK, Bax, and Caspase-3 (P<0.01) and reduced protein level of Bcl-2 (P<0.01). Compared with the model group, Chufeng Yisuntang, p38 MAPK inhibitor, and the combination down-regulated the protein levels of p38 MAPK, Bax, and Caspase-3 (P<0.01), while up-regulating the protein level of Bcl-2 (P<0.01). Compared with the Chufeng Yisuntang group, the combination group exhibited decreased protein levels of p38 MAPK, Bax, and Caspase-3 (P<0.01) and increased protein level of Bcl-2 (P<0.01). Real-time PCR revealed that compared with the control group, the model group exhibited upregulated mRNA levels of p38 MAPK, Bax, and Caspase-3 (P<0.01), and downregulated mRNA level of Bcl-2 (P<0.01). Compared with the model group, Chufeng Yisuntang, p38 MAPK inhibitor, and the combination down-regulated the mRNA levels of p38 MAPK, Bax, and Caspase-3 (P<0.01), while up-regulating the mRNA level of Bcl-2 (P<0.05, P<0.01). Compared with the Chufeng Yisuntang group, the combination group exhibited decreased mRNA levels of p38 MAPK, Bax, and Caspase-3 expression (P<0.05, P<0.01) and increased mRNA level of Bcl-2 (P<0.01). ConclusionChufeng Yisuntang may partially protect against PM2.5-induced corneal injury by inhibiting the ROS/p38 MAPK pathway, enhancing antioxidant defense, and reducing epithelial apoptosis.
2.Effect of transcutaneous electrical acupoint stimulation on chronic obstructive pulmonary disease: a meta-analysis
Ruixin CHE ; Yongtian TANG ; Shiqin PAN ; Yaqian TONG
Chinese Journal of Rehabilitation Theory and Practice 2026;32(4):426-436
ObjectiveTo investigate the effect of transcutaneous electrical acupoint stimulation (TEAS) on pulmonary function, exercise endurance and clinical symptoms in patients with chronic obstructive pulmonary disease (COPD). MethodsRandomized controlled trials on the effect of TEAS on COPD were systematically searched in CNKI, Wanfang Data, VIP Database, SinoMed, PubMed, Embase and Cochrane Library from inception to March, 2025. Two researchers independently screened the literature and extracted data. The methodological quality of the included researches was assessed using the Cochrane Handbook for Systematic Reviews of Interventions version 5.1.0 risk-of-bias tool and the PEDro scale. Statistical analysis was performed using RevMan 5.4. ResultsA total of eleven studies involving 542 patients were included. Scores of PEDro scale ranged from five to nine. TEAS significantly improved forced expiratory volume in one second (FEV1) (MD = 0.19, 95%CI 0.08 to 0.29, P < 0.001), FEV1/forced vital capacity (MD = 5.15, 95%CI 4.21 to 6.09, P < 0.001), FEV1% predicted (MD = 8.46, 95%CI 5.71 to 11.22, P < 0.001), peak expiratory flow (MD = 0.18, 95%CI 0.05 to 0.31, P = 0.006), and COPD Assessment Test (CAT) score (MD = -3.60, 95%CI -4.81 to -2.40, P < 0.001). Distance of 6-minute walk test increased significantly (MD = 25.97, 95%CI 7.88 to 44.05, P = 0.005), however, after sensitivity analysis, the magnitude of improvement was limited and did not reach the minimal clinically important difference threshold. Subgroup analysis showed that multi-acupoint intervention was more effective than single-acupoint intervention (MD = 0.29 vs. 0.12), and one to two weeks of intervention was the most effective (MD = 0.37). TEAS combined with conventional medication or exercise training showed synergistic benefits. ConclusionTEAS helps improve pulmonary function and clinical symptoms in patients with COPD. TEAS combined with conventional interventions may produce synergistically enhanced effects.
3.Advances in computational approaches to herbal prescription recommendation in traditional Chinese medicine: A review
Xin DONG ; Geyan PAN ; Juxian TANG ; Xuchen ZHANG ; Yutong HOU ; Peng ZHANG ; Xiaohan MAO ; Zhipeng KE ; Zongyao ZHAO ; Xuezhong ZHOU
Science of Traditional Chinese Medicine 2026;4(2):119-131
Intelligent prescription recommendation has become an important research direction in traditional Chinese medicine (TCM), offering new opportunities to support clinical decision-making and promote the modernization of TCM practice. With the rapid development of artificial intelligence (AI), a variety of computational approaches have been proposed to learn prescription patterns from clinical data and generate personalized treatment recommendations. However, despite increasing research activity, systematic and comprehensive reviews of AI-driven methods for TCM prescription recommendation remain limited. In this study, we present a comprehensive review of computational approaches for herbal prescription recommendation (HPR) in TCM. Existing methods are systematically categorized into several major paradigms, including traditional machine learning methods, topic model methods, sequential generative methods, deep learning and graph-based methods, and large language model–based frameworks. In addition to summarizing methodological developments, we also review commonly used public datasets and evaluation metrics in this field. Furthermore, representative models with publicly available implementations are experimentally evaluated on multiple benchmark datasets to provide a comparative analysis of their performance on the HPR task. Finally, we discuss the key challenges that hinder the practical deployment of intelligent prescription recommendation systems, including data heterogeneity, limited interpretability, and insufficient integration of TCM domain knowledge. Future research directions are outlined to facilitate the development of more reliable, interpretable, and clinically applicable AI-assisted HPR systems for TCM.
4.Effect of Folic Acid-modified Crebanine Polyethylene Glycol-polylactic Acid Hydroxyacetic Acid Copolymer Nanoparticles Combined with Ultrasonic Irradiation on Subcutaneous Tumor Growth of Liver Cancer in Mice
Rui PAN ; Junze TANG ; Hailiang ZHANG ; Kun YU ; Xiaoyu ZHAO ; Xin CHENG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(4):217-225
ObjectiveTo investigate the effect of folic acid-modified crebanine polyethylene glycol-polylactic acid hydroxyacetic acid copolymer(PEG-PLGA) nanoparticles(FA-Cre@PEG-PLGA NPs, hereinafter referred to as NPs) combined with ultrasonic irradiation on subcutaneous tumor of liver cancer in Kunming(KM) mice. MethodsEighty-four healthy male KM mice were utilized to establish a subcutaneous tumor model of mouse hepatocellular carcinoma with H22 cells, then mice were randomly divided into model group, placebo group, hydroxycamptothecin group(8 mg∙kg-1), low, medium and high dose crebanine raw material groups(2, 2.5, 3 mg∙kg-1, hereinafter referred to as the low, medium and high dose crebanine groups, respectively), low, medium and high dose NPs groups(2, 2.5, 3 mg∙kg-1), and low, medium and high dose NPs combined with ultrasonic irradiation groups(2, 2.5, 3 mg∙kg-1, hereinafter referred to as the low, medium and high dose combination groups, respectively). The corresponding doses of drugs were administered via tail vein injection, the model group received no treatment, while the placebo group was injected with an equivalent amount of normal saline. Dosing was conducted for a total of 10 times on alternate days. The body mass of the mice was monitored, and parameters such as body mass change rate, thymus index, spleen index, tumor volume, tumor weight, relative tumor growth rate(T/C), and tumor inhibition rate(TGI) were calculated. Pathological changes in liver and kidney tissues as well as the tumor were observed by hematoxylin-eosin(HE) staining. Additionally, the levels of aspartate aminotransferase(AST), alanine aminotransferase(ALT), blood urea nitrogen(BUN) and creatinine(CREA) in serum of mice were detected by biochemical method. Furthermore, the effect of ultrasound on the distribution of NPs in subcutaneous tumors of mouse hepatocellular carcinoma was observed by in vivo imaging technique. ResultsAmong different treatment methods, the combination of NPs and ultrasound irradiation had the best therapeutic effect. Compared with the model group, the body mass growth rates of mice in the medium and high combination groups decreased, while the thymus index and spleen index increased, but there was no statistically significant difference in serum AST, ALT, BUN and CREA levels, indicating that NPs combined with ultrasound irradiation had little effect on the normal physiological state of the body, oth groups had TGI>40% and T/C<60%, indicating a clear anti-tumor effect. Pathological analysis showed that compared with the NPs groups, the combination groups exhibited varying degrees of necrosis in tumor cells, accompanied by less damage to the liver and kidneys. In vivo imaging of small animals showed that compared with the high dose NPs group, the high dose combination group had stronger tumor targeting ability(P<0.01). ConclusionNPs combined with ultrasonic irradiation can not only effectively targeted the drug to the tumor site, inhibit the subcutaneous tumor growth of mouse liver cancer, but also decrease damage to liver and kidney tissues.
5.The influencing factors of hyperacusis in normal hearing population and the construction of a nomo-gram prediction model
Yao CHENG ; Qingchun PAN ; Bei LI ; Yuanling WANG ; Jing ZHANG ; Xiaoming TANG
Journal of Audiology and Speech Pathology 2025;33(5):448-454
Objective To investigate the influencing factors of auditory hypersensitivity in normal hearing population and build a risk nomogram model according to the results,so as to provide scientific basis for early identi-fication of high risk population and formulation of prevention strategy.Methods A total of 410 volunteers with nor-mal pure tone hearing were recruited from March to July 2024.The hyperacusis questionnaire(HQ)was used to as-sess the audiroty hypersensitivity of the subjects.The participants were divided into a training set(n=287)and a validation set(n=123)according to a ratio of 7∶3.Binary Logistic model was used to construct risk model and no-mogram.Receiver operating characteristic(ROC)curve,Hosmer-Lemeshow calibration curve,clinical decision curve(DCA)and clinical impact curve were used to verify the differentiation,accuracy and clinical applicability of the model,respectively.Results Among 410 participants,54(13.17%)had hyperacusis including 38(13.24%)in the training set amd 16(13.01)in the validation set.LASSO regression and Logistic regression analysis showed that tinnitus(OR=3.784,95%CI=1.627-8.804),HADS-A(OR=3.860,95%CI=1.503-9.913),HADS-D(OR=3.118,95%CI=1.249-7.785),migraine(OR=2.821,95%CI=1.147-6.937)and noise exposure histo-ry(OR=3.799,95%CI=1.715-8.416)were the influential factors for hyperacusis in participants with normal hearing.Conclusion The incidence of hyperacusis in normal hearing population is 13.17%.Tinnitus,HADS-A,HADS-D,migraine and noise exposure history are related to the occurrence of hyperacusis in normal hearing popula-tion.The risk prediction nomogram model based on the above factors has good differentiation and calibration degree.It can effectively predict the risk of hyperacusis in normal hearing people,and has certain clinical practicability.
6.Analysis of potential profile categories and influencing factors of cancer related worries in postoperative patients with early lung cancer
Yingzi YANG ; Xuefeng TANG ; Chen SHEN ; Xiaoting PAN ; Xinxin CHEN ; Yumei LI
Chinese Journal of Practical Nursing 2025;41(4):297-304
Objective:To explore the potential profile characteristics of cancer-related worries in patients after surgery for early-stage lung cancer, and the influencing factors of different categories, provide reference for patients to formulate individualized rehabilitation programs and psychological intervention measures.Methods:A cross-sectional survey method was used to conveniently select patients who received outpatient follow-up after lung cancer surgery at Shanghai Pulmonary Hospital Affiliated to Tongji University from October 2022 to October 2023 as the survey subjects. The general information questionnaire, the Chinese version of Brief Cancer-related Worry Inventory, the Chinese version of the MD Anderson Symptom Inventory, Brief Illness Perception Questionnaire, 10-item Connor Davidson Resilience Scale and Medical Coping Modes Questionnaire were examined. Latent profile analysis was performed on the cancer-related worry scores of lung cancer surgery patients, and its influencing factors were explored by binary Logistic regression analysis.Results:A total of 302 patients after lung cancer surgery were included, including 111 males and 191 females, aged 18-83(52.73 ± 13.07) years, and the Chinese version of the Brief Cancer-related Worry Inventory scored 380.00 (130.00, 720.00) points. The cancer-related worry of patients after lung cancer surgery could be divided into two potential profile categories: "high worry type" (138 patients accounted for 45.70%) and "low worry type" (164 patients accounted for 54.30%). Symptom burden ( OR=1.055, 95% CI 1.039-1.072), illness perception ( OR=1.190, 95% CI 1.127-1.256), resilience ( OR=0.933, 95% CI 0.886-0.983), and coping modes of confrontation ( OR=0.857, 95% CI 0.757-0.971) and acceptance-resignation ( OR=1.247, 95% CI 1.050-1.481) were influencing factors for grouping cancer related worry profiles (all P<0.05). Conclusions:There was significant heterogeneity in the level of cancer-related worries among patients after surgery for early-stage lung cancer. It is recommended that medical staff provide targeted continuity care measures based on the characteristics of worries of different categories of patients to improve patients' postoperative mental health and quality of life.
7.Mechanism of action of Qingjie Huagong decoction reducing inflammatory response of acute pancreatitis based on PI3K/AKT/NF-κB signaling pathway
Xiao-dong ZHU ; Min-chao FENG ; Kun-rong LIU ; Ying BAN ; Pan SU ; Chuan-feng XUAN ; Xiao-yi HUANG ; De-wen LI ; Xi-ping TANG ; Guo-zhong CHEN
Chinese Pharmacological Bulletin 2025;41(5):978-984
Aim To explore the therapeutic effect and mechanism of Qingjie Huagong decoction in modulating PI3K/AKT/NF-κB signaling pathway in inflammatory response of acute pancreatitis(AP)mice.Methods Twenty-four mice were randomly divided into Blank group,Model group,Ustekin group,and Qingjie Hua-gong decoction group,with six mice in each group.The AP model was prepared by using rain frogin.Serum α-AMS,PNLP,IL-1β,IL-6,IL-8,IL-18,and TNF-α lev-els were detected by ELISA;the pancreatic pathology was detected by HE staining;the expressions of PI3K,AKT,and NF-κB-related proteins and mRNAs were de-tected by immunohistochemistry,Western blot,and RT-qPCR.Results Compared with the blank group,the model group showed obvious pathological damage to the pancreas,with significantly higher serum α-AMS,PN-LP,IL-1β,IL-6,IL-8,IL-18,and TNF-α levels(P<0.01),and significantly higher levels of PI3K,AKT,and NF-κB-related proteins and mRNA expression(P<0.01).Compared with the model group,both the Qingjie Huagong decoction group and the ustekin group improved the histopathological changes in the pancreas of AP mice,decreased the serum α-AMS,PNLP,IL-1β,IL-6,IL-8,IL-18,and TNF-α levels,and down-reg-ulated the expression levels of pancreatic PI3K,AKT,NF-κB-related proteins and mRNA(P<0.05 or P<0.01).Conclusion Qingjie Huagong decoction may inhibit the inflammatory response and protect pancreat-ic tissues by regulating the expression of PI3K/AKT/NF-κB signaling pathway.
8.Incidence rates and high-risk factors of different typies of patient-ventilator asynchrony under assisted mechanical ventilation
Qimin CHEN ; Jiaoyangzi LIU ; Jia YUAN ; Dehua HE ; Ming LIU ; Caixue PAN ; Ying LIU ; Yan TANG ; Xu LIU ; Xianjun CHEN ; Chuan XIAO ; Shuwen LI ; Wei LI ; Daixiu GAO ; Feng SHEN
The Journal of Practical Medicine 2025;41(10):1509-1516
Objective To investigate the incidence and types of patient-ventilator asynchrony(PVA)in mechanically ventilated patients within the intensive care unit(ICU),and to identify associated high-risk factors,thereby providing a basis for reducing PVA,enhancing mechanical ventilation efficiency,and refining ventilation strategies.Methods A prospective observational study was conducted among patients admitted to the general ICU of the Affiliated Hospital of Guizhou Medical University from October to December 2024 who were receiving mechanical ventilation.Inclusion criteria were as follows:age ≥18 years and mechanical ventilation duration ≥12 hours.Exclusion criteria included complete controlled mechanical ventilation,palliative care or do-not-resuscitate status,and lack of informed consent.Senior respiratory therapists performed daily bedside observations of ventilator waveforms for 10~15 minutes between 08:00 and 12:00.PVA was diagnosed based on pressure-time and flow-time waveforms,with the types of PVA being recorded.Demographic and clinical data,including age,sex,body mass index(BMI),primary diagnosis,comorbidities,APACHEⅡ score at ICU admission,blood gas analysis,ventila-tion mode and parameters,analgesia and sedation status,duration of mechanical ventilation,and length of ICU stay,were collected.The incidence and types of PVA during the observation period were analyzed.Univariate and multivariate logistic regression analyses were performed to identify high-risk factors for PVA.Clinical outcomes were compared between patients with and without PVA.Results A total of 105 patients and 453 episodes of assisted mechanical ventilation waveforms were analyzed.Among these,60.95%(64/105)experienced at least one episode of PVA.Of the 453 ventilation waveforms assessed,35.76%(162/453)demonstrated PVA.The types of PVA,ranked by incidence,were as follows:cycling mismatch(12.58%,57/453),double triggering(11.92%,54/453),ineffective triggering(9.49%,43/453),flow starvation(5.30%,24/453),and exhalation flow limitation(1.77%,8/453).The incidence of PVA varied significantly across different ventilation modes:45.7%in volume-assist/control ventilation(V-A/C),38.1%in pressure-assist/control ventilation(P-A/C),42.9%in synchronized intermittent mandatory ventilation(SIMV),and 16.7%in pressure support ventilation(PSV)(P<0.001).Multi-variate logistic regression analysis revealed that the mechanical ventilation mode[reference:PSV;V-A/C:OR=4.687,95%CI:2.140~10.263,P<0.001;P-A/C:OR=2.922,95%CI:1.489~5.734,P=0.002;SIMV:OR=4.682,95%CI:1.758~12.466,P=0.002]and actual respiratory rate(OR=1.07,95%CI:1.016~1.127,P=0.011)were significant high-risk factors for PVA.Patients with PVA had a significantly longer duration of mechanical ventilation[8.21(5.35,13.91)days vs.3.00(1.96,5.71)days,P<0.001]compared to those without PVA.Conclusions PVA is commonly observed in ICU patients receiving assisted invasive mechanical ventilation,with cycling mismatch,double triggering,and ineffective triggering being the most prevalent types.The incidence of PVA tends to be lower when using the PSV mode.Clinically,real-time monitoring of patient-ventilator synchrony via ventilator waveforms,along with the optimization of ventilator modes and parameters,should be employed to minimize the occurrence of PVA and enhance the efficiency of mechanical ventilation.
9.Clinical study on laparoscopic total mesorectal excision for the treatment of colorectal cancer
Guangming PAN ; Quan CAO ; Haifeng YANG ; Bangcheng WANG ; Daiqing TANG
Chinese Journal of Primary Medicine and Pharmacy 2025;32(3):331-335
Objective:To investigate the clinical effects and advantages of laparoscopic total mesorectal excision in the treatment of colorectal cancer.Methods:A total of 82 patients with colorectal cancer who received treatment at the Second Affiliated Hospital of Guizhou Medical University from January 2020 to January 2023 were selected for a prospective study. They were randomly assigned to two groups using a random number table, with 41 cases in each group. The control group underwent conventional laparotomy, while the observation group received laparoscopic total mesorectal excision. Clinical efficacy, clinical indicators, and immune function indicators were compared between the two groups.Results:The operation time for patients in the observation group was (1.98 ± 0.31) hours, the length of hospital stay was (8.32 ± 2.38) days, the recovery time for bowel function was (2.15 ± 0.34) days, and the intraoperative blood loss was (112.35 ± 12.66) mL, all of which were shorter and lower than those in the control group [(2.46 ± 0.32) hours, (14.52 ± 2.42) days, (3.25 ± 0.15) days, and (167.78 ± 12.35) mL, t = 6.90, 11.70, 18.95, 20.07, all P < 0.001). The short-term response rate in the observation group was higher than that in the control group ( χ2 = 4.10, P < 0.05). The immune function indicators in the observation group, including the CD4 +/CD8 + ratio (1.78 ± 0.54), immunoglobulin A [(3.87 ± 0.73) g/L], and immunoglobulin G [(11.83 ± 2.88) g/L], were all better than those in the control group [(1.36 ± 0.53), (1.78 ± 0.63) g/L, (6.37 ± 2.45) g/L, t = 3.55, 13.88, 9.25, all P < 0.001]. The incidence of complications in the observation group was 2.44% (1/41), which was significantly lower than that in the control group [19.51% (8/41), χ2 = 4.49, P < 0.05]. Conclusions:Laparoscopic total mesorectal excision for patients with colorectal cancer has significant advantages, including faster recovery, less bleeding, and fewer complications, making it more superior to conventional laparotomy.
10.Feasibility Exploration of Zero-ray Radiofrequency Catheter Ablation of Atrial Fibrillation Guided by Transthoracic Echocardiography Combined With Three-dimensional Mapping System
Tianjie FENG ; Guangzhi ZHAO ; Jing DONG ; Cheng WANG ; Fengwen ZHANG ; Shouzheng WANG ; Jun LIU ; Guodong NIU ; Min TANG ; Fujian DUAN ; Xiangbin PAN
Chinese Circulation Journal 2025;40(4):374-379
Objectives:To explore the feasibility of zero-ray radiofrequency catheter ablation for paroxymal atrial fibrillation under the guidance of transthoracic echocardiography combined with three-dimensional mapping system.Methods:This is a single-center prospective observational study.A total of 12 patients with paroxysmal atrial fibrillation who underwent radiofrequency catheter ablation in Fuwai Hospital,Chinese Academy of Medical Sciences from June 1,2024 to September 30,2024 were included.All patients underwent successful percutaneous puncture,atrial septal puncture under the guidance of transthoracic echocardiography,and all patients underwent left atrial modeling and discharge ablation under the guidance of transthoracic echocardiography combined with three-dimensional mapping system.The disappearance of pulmonary vein potential was confirmed after the ablation operation and as the ablation endpoint and successful ablation marker.The operation results and 1-month and 3-month follow-up results of the patients were observed.Results:There were 12 patients with paroxysmal atrial fibrillation,9 males and 3 females,aged(56.8±11.2)years,with a history of paroxysmal atrial fibrillation(4.2±2.3)years.The mean left atrial diameter was(36.5±2.5)mm,the left ventricular end-diastolic diameter was(47.8±4.1)mm,and the left ventricular ejection fraction was 55%-65%.The mean overall operation time was(102.25±14.51)min,the ultrasound operation time was(29.58±6.23)min,and the catheter operation time was(33.08±4.10)min.All patients completed circumferential pulmonary vein isolation without intraoperative complications.The hospitalization time was 2-6 days.At the 1-month follow-up after ablation,all patients showed sinus rhythm on 24-hour ambulatory electrocardiogram,and 2 patients had occasional atrial premature contractions without recurrence of atrial fibrillation.At the 3-month follow-up,two patients had occasional premature atrial contractions,and no recurrence of atrial fibrillation was recorded on the electrocardiogram of all patients.Conclusions:It is feasible to complete radiofrequency catheter ablation of paroxysmal atrial fibrillation under the guidance of transthoracic echocardiography combined with three-dimensional mapping system.

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