诊断超声对成人心电幅值的影响

Wave amplitude change of ECG of normal adults under diagnostic ultrasound

目的：探讨诊断剂量超声对人体心理的影响。方法：用０．２Ｗ／ｃｍ２连续超声辐射成人心室区，检测和对比辐照前，辐照中及辐照后的心电幅值变化。结果：辐照９０ｓ时，肢体导联Ｒ、Ｓ波辐值较辐射前明显增大（Ｐ＜０．０１），Ｐ、Ｔ波幅值变化不明显（Ｐ＞０．０５），停止辐照后，Ｒ、Ｓ波幅逐渐恢复到辐照前的水平。结论：诊断剂量超声辐照可使成人心电幅值暂时性增大，故应尽量缩短心超检查时间。

Objective:To study the diagnostic ultrasound influencing on electrocardiogram(ECG) of normal adults.Methods:Normal younths were radiated with a ultrasonic intersity of 0.2 W/cm 2 on the ventricular area.The ECGs of every individual including before radiation,on radiation and after radiation were recorded,measured and compared respectively.Results:Compared with the before radiation,the peaks of the R and S waves of limb lead in any body were obviously enlarged at the time of 90 s( P <0.01).The waves of P and T of the same lead had not markedly changed( P >0.05).After ultrasomic radiation was stopped,the enlarged R and S wavcs could gradually recocer to the level before radiation. Concluslon:Diagnostic dosage ultrasound may result in the temporary change of wave amplitude of ECG.So the examinating time of heart ultrasound should be shortened as far as possible.