Objective To evaluate the efficacy of radiofrequeney ablation on tachyrhythmia and cardiac acute injure.Methods Endomyocardin was signified and ablated using routine methods,the effects of radiofrequency ablation on cardiac autonomic nerve function,cardiac systolic function,radiofrequency electric injury and changes of troponin,SOD and endothelin level in pre-operation and post-operation were evaluated to study RFCA procedure caused cardiac acute injury.Results Thirty-eight patients with tachyarrhythmia underwant RFCA.The successful rate was 100%,and none had serious complications.Postoperative LF and HF were reduced significantly as compared with preoperation,Atrium and ventricle premature beats had no significant difference before and after RFCA.Cardiac systolic function had no significant changes before and after procedure,but troponin,SOD and endothelin levels were significantly higher in postoperation than those of preoperation.Conclusions RFCA is a principal therapy of tachyarrhythmia because its excellent therapeutic effect,less side effect and eradication,RFCA has acute cardiac injury,but the injury is slight.

BACKGROUND: A large amount of cell dies of apoptosis in secondary injury stage after spinal cord injury.OBJECTIVE: To probe into the influence of local intraspinal infusion with danshen injection on necrosis and apoptosis of spinal cell after acute spinal cord injury.DESIGN: Randomized controlled experiment was designed.SETTING: Clinical Medical Trial Center of People' s Hospital Affiliated to Yunyang Medical College.MATERIALS: Forty-four Chinese white rabbits of first grade were employed, aged varied from 4 to 5 months, of either sex, mass weighted varied from 2.0 to 2.5 kg.INTERVENTIONS: The experiment was performed in Clinical Medical Trial Center of People' s Hospital Affiliated to Yunyang Medical College from June 2002 to July 2003. Two groups were randomized, named danshen group and the control group, 22 rabbits for each. In both groups, modified Allen method was used to prepare the model of incomplete spinal cord injury. In danshen group, danshen injection was infused from subdural catheter for 4times at 0. 3 mL/kg per day of the total amount (once every 6 hours). In the control group, physiological saline of same dose was injected. The animals were sacrificed at the 8th, 24th and 72nd hours successively after injection for pathological and histomorphologic observation, peroxide dismutase and malondialdehyde determination and determination of positive cell count of B-cell lymphoma-2 (Bcl-2), the apoptosis-inhibition gene.MAIN OUTCOME MEASURES: Cell apoptotic index and cell apoptotic rate in the region of spinal cord injury.RESULTS: Forty-four rabbits entered result analysis for all. ① Results of cell apoptosis: Apoptotic index in danshen group was less remarkably than that in the control group(13.10 ± 1. 38, 20.39±2.96, 4.101, P ＜0.01); cell apoptotic rate was lower remarkably than the control group[ (9.67 ± 1.09)%,(14.68±2.81)%, t=4.072, P ＜0.01] and Bcl-2 expression was more than that in the control group[ (19. 12 ± 4.74) /mm2, ( 13.37 ± 3.68) /mm2,t = 2. 347, P ＜ 0.01 ]. ② POD content: The result in danshen group was higher thanthe control group[ (136.20 ± 13.64) NU/mL, (101.70 ± 15.24) NU/mL,t = 4. 132, P ＜ 0.01 ]. ③ Malondialdehyde content: The result in danshen group was lower than the control group[ (1.27 ± 0. 22) nmol/mL,(2.54±0.69) nmol/mL, t=4.309, P ＜0.01] . ④Degeneration and necrosis of neuron and neural fiber: The result in danshen group was milder than the control group.CONCLUSION: After local infusion with danshen(Radix Salviae Miltiorrhizae), cell apoptosis was decreased in local spinal cord injury and cell necrosis was inhibited and alleviated after acute spinal cord injury.

Objective: To perform an epidemiological survey of the first case with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in Pinghu City of Jiaxing City, Zhejiang Province on March 13, 2022, so as to provide insights into the management of coronavirus disease (COVID-19) epidemics. Methods: According to the requirements of the Protocol on Prevention and Control of COVID-19 (8th Edition), epidemiological investigations were performed among 39 cases with SARS-CoV-2 infections in Pinghu City from March 13 to 20, 2022. Cases' demographics, clinical symptoms, history of immunization and exposure were collected, and close contacts were identified. Pharyngeal swabs were sampled from infected cases for detection of SARS-CoV-2 nucleic acid and whole-genome sequencing, and the source of infection and transmission route were investigated. Results: The index case for this COVID-19 epidemic was an imported case from Shanghai Municipality, who infected 6 persons via aerosol transmission when playing in the badminton venue of Pinghu National Fitness Center on March 9; subsequently, one of these infected cases infected another 18 persons when playing in the badminton venue of Jiadian Village Resident's Fitness Center in Zhapu Township on March 12. Sixteen confirmed cases were reported, and all cases were mild; another 23 asymptomatic cases were diagnosed, with no death reported. This epidemic occurred from March 11 to 20, with 3 generations of spread and a median incubation period of 3 days. The SARS-CoV-2 infected cases had a median age of 33.5 (interquartile range, 12.0) years and included 36 cases with a history of COVID-19 vaccination. There were 16 cases with fever, cough, runny nose and sore throat, and 13 cases with imaging features of pneumonia. The effective reproductive number (Rt) of the COVID-19 epidemic was 7.73 at early stage, and was less than 1 since March 21. Whole-genome sequencing identified Omicron BA.2 variant among 33 cases, which had high homology with the index cases. Conclusion This epidemic was a cluster of COVID-19 caused by imported Omicron BA.2 variant infection from Shanghai Municipality, and the COVID-19 transmission was mainly caused by indoor aerosols.