CAJ | 학술논문

目的了解特种部件接触人员老年期心脏结构及心功能情况,探讨辐射可能对心血管系统的影响及程度.方法应用西门子G60彩色多普勒仪对50例男性老年期(＞60岁)特种部件接触人员(接触组)与50名军分区干休所未接触特种部件的老干部(＞60岁)(对照组)进行心脏瓣膜组织结构指标、心室收缩及舒张功能敏感指标检查,同时进行常规心电图检查,并进行对比分析研究.结果与对照组比较,接触组射血分数、短轴缩小率的差异无统计学意义(t=1.52,t=1.68,P均＞0.05),心输出量、每搏排血量、每搏指数、心室舒张早期E峰速度/舒张晚期A峰速度(E/A)值均显著降低(t=11.81、t=7.11、t=7.34和t=7.88,P均＜0.001),左房、左室扩大(t=4.85,P＜0.01;t=6.61,P＜0.001).心电图显示,接触组窦性心率不齐和心肌供血不足显著高于对照组(x2=9.72和x2=5.19,P均＜0.05).结论长期小剂量慢性辐射对心血管系统可能有一定的影响,因此动态监测心脏结构及功能的变化有利于保护特种部件接触人员的安全与健康.
목적 료해특충부건접촉인원노년기심장결구급심공능정황,탐토복사가능대심혈관계통적영향급정도.방법 응용서문자G60채색다보륵의대50례남성노년기(＞60세)특충부건접촉인원(접촉조)여50명군분구간휴소미접촉특충부건적로간부(＞60세)(대조조)진행심장판막조직결구지표、심실수축급서장공능민감지표검사,동시진행상규심전도검사,병진행대비분석연구.결과 여대조조비교,접촉조사혈분수、단축축소솔적차이무통계학의의(t=1.52,t=1.68,P균＞0.05),심수출량、매박배혈량、매박지수、심실서장조기E봉속도/서장만기A봉속도(E/A)치균현저강저(t=11.81、t=7.11、t=7.34화t=7.88,P균＜0.001),좌방、좌실확대(t=4.85,P＜0.01;t=6.61,P＜0.001).심전도현시,접촉조두성심솔불제화심기공혈불족현저고우대조조(x2=9.72화x2=5.19,P균＜0.05).결론 장기소제량만성복사대심혈관계통가능유일정적영향,인차동태감측심장결구급공능적변화유리우보호특충부건접촉인원적안전여건강.
Objective To investigate the structural and functional changes of heart in elderly soldiers who was working with radiation producing equipments. The involvement of cardiovascular system in radiation and its intensity was investigated in this study. Methods Fifty elderly males (＞60 years old) who were exposed to radiation producing equipments (exposure group) and 50 elderly (＞60 years old) retired male commanders without radiation exposure history (control group) were enrolled in this study. Echocardiographic evaluation of cardiac structure and function was conducted with Siemens Sonline Gt0 ultrasound system. 12-lead electrocardiogram ( ECG ) and routine physical examination had also been done in both groups. Results Ejection fraction, minor axis reduced rate had no distinct difference between exposure group and control group (t=1.52 and t=1.68, P＞0.05). Cardiac output, cardiac stroke volume, stroke index, ventricular diastolic flow velocity E/A ratios in exposure group were lower than control group ( t= 11.81, t=7.11, t=7.34 and t=7.88, P＜0.001); left atrial and ventricular expansion is larger in exposure group ( t=4.85, P＜0.01; t=6.61, P＜0.001 ); also, higher rates of ECG abnormalities was found in exposure group (x2=9.72 and x2=5.19, P＜0.05 ). Conclusion Chronic low dose radiation may have effects on the cardiovascular system, so dynamic monitoring of changes in cardiac structure and function is worth on the safety and health for persons who may exposure to radiation and help to prevent early and long-term effects of radiation.