Objective To investigate about establishment the animal model of atrial fibrillation(AF) by high thyroxine and electrophysiological study of left atrium.Methods 49 rabbits were randomly divided into three groups, control group (10, injection of saline), withdrawal group (20, injection of levo-thyroxine 50μg/kg, change to inject isodose saline after two months), continuous dosing group (19, injection of levo-thyroxine 50μg/kg everyday).the data of left atrium effective refractory period(AERP), conduction velocity(CV), wavelength(WL) and AF induced ratio were collected after four months.Results The withdrawal group and continuous dosing group AERP200, AERP150 were more shorter than the control group after two months(P<0.05), The continuous dosing group AERP200, AERP150 was shorter significantly than withdrawal group and control group after four months ( P<0.01 ).The withdrawal group and continuous dosing group CV were slower than control group after two months ( P<0.05 ).The continuous dosing group CV was slower significantly than withdrawal group and control group after four months ( P<0.01 ).The withdrawal group and continuous dosing group WL were shorter than control group after two months(P<0.05), The continuous dosing group WL was shorter significantly than withdrawal group and control group after four months (P<0.01).The AF induced ratio in the continuous dosing group increased significantly(P<0.01). After four months, but the withdrawal group decreased, the control group did not induce AF.Conclusion It's feasible to establish the rabbit model of AF by high thyroxine, with left atrium electrophysiological changes, which provides animal model for further to study the pathogenesis of AF cause of hyperthyroidism.

Background and purpose:It has been demonstrated that radical prostatectomy for patients with oligometastatic prostate cancer may contribute to improving local control of prostate cancer and overall survival by several retrospective studies. Perioperative complications play an important role in determining whether radical prostatectomy is appropriate for patients with oligometastatic prostate cancer. This study aimed to discuss the recurrence rate and the sever-ity of perioperative complications, and the primary curative effect of radical prostatectomy on oligometastatic prostate can-cer patients.Methods:A total number of 247 patients who received radical prostatectomy were recruited in the study from Jul. 2015 to Jan. 2016, including 25 patients with oligometastatic prostate cancer and 222 patients with localized prostate cancer. Patients with perioperative complications in both groups were graded with the Clavien-Dindo grading system. The proportion of PSA decline and the rates and severity of perioperative complications were analyzed in both groups.Results:The cases of prostate specific antigen (PSA) decline in the oligometastatic group were 21 (84.0%), lower than the localized group with 212 cases (95.5%). There were 6 cases (24.0%) with postoperative complications in the oligometastatic group, including serious complications (Ⅲ or above) 1 case (4.0%), and 49 cases (22.1%) with postoperative complications in the localized group, including serious complications (Ⅲ or above) 7 cases (3.2%). The differences between the groups reached no statistical significance (P>0.05).Conclusion:Radical prostatectomy for patients with oligometastatic prostate cancer could be safe, effective, and appropriate, the risk of perioperative complications should not be one of the limiting factors.

Background and purpose:To perform whole mount technique in the diagnosis of the prostate cancer could provide orientation to the specimen. Whole mount technique has great value in pathologic diagnosis and morphological research. However, limited by the specimen-making technique, shortage of equipment and heavy workload, this technique has not been generally accepted in China. The aim of this study was to evaluate the signiifcance of whole mount technique in the diagnosis of the prostate cancer by comparing the clinical and pathological variables between whole mount patients and conventional ones after radical prostatectomy (RP).Methods:A total number of 229 patients’ whole mount RP specimens were recruited in the study from Dec. 2012 to Feb. 2014. The control group included 393 patients’ specimens which underwent conventional sampling from Jan. 2010 to Jun. 2012. We compared the clinical and pathological variables between the groups, including age, preoperative PSA level, methods of diagnosis, preliminary diagnostic Gleason score, clinical T stage, postoperative Gleason score, pathological T stage, positive surgical margin, extraprostatic extension, seminal vesicle invasion and pelvic lymph node metastasis.Results:Two groups shared similar preoperative parameters. Also there was no signiifcant difference between the whole mount and the conventional sampling groups in postoperative Gleason score, pathological T stage, extraprostatic extension and pelvic lymph node metastasis. However, positive surgical margin and seminal vesicle invasion rates were much higher in the whole mount group than the control one and both of the differences reached statistical signiifcance (26.2%vs 17.6%, 23.1%vs 17.0%;P=0.010, 0.025)Conclusion:After compared the clinical and pathological variables, we could conclude that whole mount technique has prevalence in the diagnosis of the positive surgical margin and seminal vesicle invasion compared with the conventional sampling technique. Thus, whole mount technique should be strongly recommended in the diagnosis of prostate cancer.