目的 探究高原地区世居居民与常住居民的心脏结构和功能的差异性。方法 选择2022年6月—2023年8月在西藏林芝市人民医院体检的200例世居居民与常住居民作为研究对象,将世居居民和常住居民按照性别分为男女亚组,按照年龄段分为18~31岁、31~40、41~50岁亚组。比较各亚组心脏结构参数、左心功能参数、多普勒超声检测参数差异。结果 与高原常住居民男性和女性比较,世居居民男性和女性的左房内径、右房内径、右室内径、肺动脉内径、升主动脉内径、主动脉根径、室间隔厚度、左室后壁厚度、左室舒张末内径、左室收缩末内径、左室射血分数、二尖瓣 A 峰流速指标比较差异均无统计学意义（P>0.05）;而主动脉瓣口流速、肺动脉瓣口流速、二尖瓣 E 峰流速增加,两组间比较差异具有统计学意义（P<0.05）。18~31岁、31~40、41~50岁组世居居民和常住居民左房内径、右房内径、右室内径、肺动脉内径、升主动脉内径、主动脉根径、室间隔厚度、左室后壁厚度、左室舒张末内径、左室收缩末内径、左室射血分数、二尖瓣 A 峰流速指标等指标比较差异均无统计学意义（P>0.05）,但世居居民主动脉瓣口流速、肺动脉瓣口流速、二尖瓣 E 峰流速均高于常住居民,差异具有统计学意义（P<0.05）。结论 高原地区世居居民和常住居民心脏结构参数和左心功能参数无明显差异。但世居居民主动脉瓣口流速、肺动脉瓣口流速、二尖瓣 E 峰流速均高于常住居民。

Objective To explore the ethnic differences in heart structure and function between aborigines and long term residents in the plateau area. Methods A total of 200 aborigines and long term residents who underwent physical examination in our hospital from June 2022 to August 2023 were selected as the study subjects,and the aborigines and long term residents were divided into male and female subgroups,and subgroups aged 18-30 years,31-40 years and 41-50 years．The differences of cardiac structure parameters,left ventricular function parameters and Doppler parameters were compared among subgroups. Results The left atrial diameter,right atrial diameter,right ventricular diameter,pulmonary artery diameter,ascending aorta diameter,aortic root diameter,interventricular septal thickness,left ventricular posterior wall thickness,left ventricular end-diastolic diameter,left ventricular end-systolic diameter,left ventricular ejection fraction mitral valve A peak velocity were compared between Aborigines and plateau Long Term Residents,which were no significant difference（P>0.05）．However,the velocity of aortic valve orifice,pulmonary valve orifice and mitral valve E peak velocity increased,and the differences were statistically significant（P<0.05）．There were no significant differences in left atrial diameter,right atrial diameter,right ventricular diameter,pulmonary artery diameter,ascending aorta diameter,aortic root diameter,interventricular septal thickness,posterior left ventricular wall thickness,left ventricular end-diastolic diameter,left ventricular end-systolic diameter,left ventricular ejection fraction,left ventricular diameter,left ventricular diameter,and left ventricular ejection fraction mitral valve A peak velocity indexes in aborigines and long term residents between among aged 18-30 years,31-40 years,41-50 years（P>0.05）,but the differences of aortic valve orifice velocity,pulmonary valve orifice velocity and mitral valve E peak velocity were statistically significant（P<0.05）. Conclusions There were no significant difference in cardiac structure parameters and left heart function parameters between aborigines and long term residents in plateau area．However,the aortic orifice velocity,pulmonary orifice velocity and mitral E-peak velocity of aborigines were higher than those of long term residents．

目的 通过研究微泡超声空化增强微波消融对兔VX2肿瘤的热消融效应来探究其在肿瘤治疗中的价值。方法 24只肝脏移植瘤兔随机分为空白对照组、单纯超声空化治疗组、单纯微波消融治疗组、超声空化联合微波消融治疗组4组。利用增强超声显示每组治疗前后肿瘤的大小、形状和轮廓并通过温度针来检测治疗区域的局部温度。结果 联合治疗组血流灌注缺损最严重,微波消融组和联合治疗组缺损体积分别为1.53±0.20和1.68±0.43(P=0.117);微波消融组以及联合治疗组消融治疗时温度达平台时间分别为(21.7±5.0)s和(10.3±5.0)s(P<0.01),最高温度(℃)分别为100.9±5.0和134.1±6.0(P<0.01)。结论 MWA联合MEUS治疗肝癌可使治疗区局部温度急剧升高至峰值温度,有望提高肝癌治疗效果。

Objective To investigate the thermal ablation effect of microbubble ultrasound cavitation combined with microwave ablation on rabbit VX2 tumors. Methods Twenty-four rabbits with liver transplantation tumors were randomly divided into four groups: blank control group, ultrasound-only cavitation treatment group, microwave-only ablation treatment group, and ultrasound-cavitation combined with microwave ablation treatment group. Enhanced ultrasound was used to show the size, shape and contour of the tumor before and after treatment in each group, and the local temperature of the treatment area was detected by a temperature needle. Results The blood flow perfusion defect was the most severe in the combined treatment group. The defect volume of the microwave ablation group and the combined treatment group were 1.53±0.20 and 1.68±0.43 (P=0.117). The temperature reached the plateau time in the microwave ablation group and the combined treatment group. It was (21.7±5.0)s and (10.3±5.0)s (P<0.01), and the highest temperature (℃) was 100.9±5.0 and 134.1±6.0 (P<0.01). Conclusion MWA combined with MEUS for liver cancer can sharply increase the local temperature in the treatment area to the peak temperature, which is expected to improve the treatment effect of liver cancer.