左心室壁显微结构与心肌背向散射积分周期变化的关系  

Relationship Between Microstructure of Left Ventricle and Cyclic Variation of Myocardial Ultrasonic Backscatter Integration

作　　者：朱永胜[1] 钱蕴秋[1] 李军[1] 张军[1] 朱霆[1] 

机构地区：[1]第四军医大学西京医院超声诊断科,西安市710032

出　　处：《中国超声医学杂志》2002年第9期644-646,共3页Chinese Journal of Ultrasound in Medicine

摘　　要：目的 :探讨心肌组织超声背向散射积分呈周期变化的组织学基础。方法 :SD大鼠 6 0只 ,随机分为 2组 ,分别向冠状动脉注入高钾或高钙溶液使心脏停搏于舒张期或收缩期 ,对照研究心肌组织学结构与超声背向散射积分值的相关性。结果 :收缩期和舒张期单位面积心肌内的血管数目、血管平均内径、心肌纤维长度、心肌纤维宽度、结缔组织截面积等均有显著差别。结论Objective:To explore the histological mechanism of myocardial integrated backscatter varying cyclically.Methods:Sixty SD rats were divided randomly into 2 groups.Hyper calcium solution or hyper potassium solution were injected into the coronary artery to one group to make heart arrest at systole or at diastole.Correlation between myocardial historical structure and ultrasonic backscatter integration was analyzed.Results:Number of microvessels,mean vascular diameters,length and width of myocardial fibers in cross area of conjunctive tissues were all different between diastole and systole.Conclusions:Histologic structural difference between diastole and systole is the foundation of cyclic variation of ultrasonic backscatter integration.

关 键 词：左心室 壁显微结构 心肌 背向散射积分 周期变化 超声波诊断 

分 类 号：R540.45[医药卫生—心血管疾病]