Objective To investigate the age-associated changes of electrophysiological properties of atrial muscle and the relationship between these changes and atrial fibrillation (AF). Methods According to their ages forty Wistar rats were divided into 4 age groups: young group, adult group, middle-aged group and old group (n=10 each group ). Hearts were isolated and perfused by Langendorff. MAP (monophasic action potential) of atrial muscle was recorded. MAPD (duration of MAP) and ERP (effective refractory period) at 400 ms of the stimulation cycle length, and MAPD at other different stimulation cycle lengths were measured in each group. Results At the stimulation cycle length of 400 ms, MAPD_(90) of right atrial muscle prolonged gradually from young group to old group (P

Objective To investigate the effects of gastric bypass on glycometabolism and improvement of islet β cell function and insulin resistance in patients with type 2 diabetes. Methods Eight patients with type 2 diabetes combined with gastric carcinoma who treated with gastric bypass were studied prospectively. Fasting and postprandial plasma glucose levels, fasting and postprandial insulin C-peptide levels, and body mass index (BMI) were measured right before the surgery and at intervals of 1 week, 2 weeks, 1 month and 3 months after the surgery. Glycosylated hemoglobin (HbA1c) levels were measured before and 3 months after the surgery. The outcome of the diabetes after 3 months of the surgery was also monitored. Results Fasting and postprandial plasma glucose levels decreased (P ＜ 0.05) and fasting and postprandial insulin C-peptide levels increased (P ＜ 0.05) after the surgery. HbA1c levels also decreased (P ＜ 0.05) after 3 months of the surgery. There was no significant change of BMI at all intervals after the surgery(P＞ 0.05). All of the 8 patients reached the total effective standard and 6 patients reached the clinical remission standard after 3 months of the surgery. Conclusions It suggests that gastric bypass can significantly lower plasma glucose levels in type 2 diabetes, which does not depend on the loss of weight. The control of plasma glucose by gastric bypass may be due to the improvement of islet β cell function and increasing secretion of endogenous insulin.

Objective To compare the prognosis of cognitive dysfunction in patients with cerebral hemorrhage and cerebral infarction by observing the effect of comprehensive rehabilitation intervention based on attention and working memory on the patients with cognitive dysfunction after cerebral hemorrhage and cerebral infarction.Methods A total of 44 patients with cognitive dysfunction after stroke admitted to the Rehabilitation Department of the First Hospital of Jilin University from September 2018 to January 2021 were selected，including 19 patients with cerebral infarction and 25 patients with cerebral hemorrhage，aged from 18 to 80 years，with the course of disease ranging from 2 weeks to 12 months. Both groups received cognitive training based on attention and working memory and conventional rehabilitation therapy，cognitive training 20 minutes a day,6 days/ week，for 4 weeks. Routine rehabilitation includes physical factor therapy，exercise therapy，occupational therapy，aerobic exercise，acupuncture，etc. Montreal Cognitive Assessment（MoCA） was used to assess Cognitive function in all patients before and after treatment.Results After treatment，MoCA scores of 2 groups were significantly higher than those before treatment，the difference was statistically significant（P<0.05）；The improvement of MoCA scores in cerebral hemorrhage group was higher than that in cerebral infarction group，and the difference was statistically significant（P<0.05）.Conclusion Comprehensive rehabilitation intervention based on attention and working memory can effectively improve the level of cognitive function in patients with intracerebral hemorrhage and cerebral infarction，and the prognosis of cognitive function after intracerebral hemorrhage may be better.

Objective To describe the clinical features,diagnosis and treatment of osteomyelitis caused by Burkholderia pseudomallei.Methods Three cases of osteomyelitis caused by B.pseudomallei were treated in Haikou People's Hospital affiliated to Xiangya Medical College of Central South University from April 2007 to April 2017.The clinical data were reviewed and analyzed retrospectively.Relevant reports of osteomyelitis due to B.pseudomallei in China and abroad from 2007 to 2017 were comprehensively reviewed.Results The clinical manifestations included hot feeling,redness,swelling,and pain at site of infection.The infection usually occurred in tibia,femur,and skull bone.There were usually multiple lesions,frequently involving spleen,soft tissue and joints.The main imaging finding was osteomyelitis.The diagnosis was confirmed by bacterial culture in all patients.Antimicrobial therapy combined with surgical intervention was the most common approach in the stage of intensive treatment.Ceftazidime,trimethoprim-sulfamethoxazole and carbapenems were the mostly used antibiotics.However,in the stage of bacterial eradication,trimethoprim-sulfamethoxazole and doxycycline were used.The duration of treatment was very long in both stages.The recurrence was low after standard treatment.Conclusions The osteomyelitis caused by B.pseudomallei lacks specific clinical manifestation.Imaging techniques can identify the site of infection,and bacterial culture helps confirm the diagnosis.Timely and effective antimicrobial therapy combined with surgical intervention can reduce mortality.Full course and standard anti-infective therapy may prevent recurrence.

This study summarizes the construction background, rules and regulations and institutional settings of the MOOC and Micro-course Club in the Second Hospital of Jilin University, discusses the means of teacher training for clinical teachers, and shows the application effect of the club. At the same time, the related problems encountered in the process of club construction are summarized and reflected. The construction of MOOC and micro-course clubs is conducive to improving the information-based teaching level of clinical teachers, and also provides new inspiration and ideas for the construction of medical clubs.

Intensive care unit acquired muscle weakness (ICU-AW) is a neuromuscular complication secondary to severe illness. The essence for this disease is skeletal muscle dysfunction. With the development of medical technology, the survival rate for severe patients has been significantly improved. The long term complications for the severe patients with ICU-AW are getting more and more common, and they seriously affect the quality of life and prognosis of patients. However, the current treatment is ineffective. Establishment of ICU-AW animal model is an important way to study the pathogenesis and intervention targets for this disease. There are many risk factors for this disease, and the principles for ICU-AW animal models are not the same at home and abroad, and the methods of preparation are different. The choice of a reasonable animal model is important for the reliability of the results.
Animals ; Critical Illness ; Disease Models, Animal ; Humans ; Intensive Care Units ; Muscle Weakness ; etiology ; mortality ; Muscle, Skeletal ; physiopathology ; Prognosis ; Quality of Life ; Reproducibility of Results ; Survival Rate