冠心病患者窦性心率振荡的变化

目的观察冠心病患者窦性心率振荡(HRT)的变化。方法记录30例非冠心病人、30例冠心病非心肌梗塞患者及30例冠心病陈旧性心肌梗塞患者24 h动态心电图,计算振荡起始(TO)及振荡斜率(TS)分析HRT。结果对照组、冠心病组和心梗组TO分别为-0.076±-0.029、-0.042±-0.012、-0.018±-0.008(P<0.01),TS分别为31.55±4.17 ms/RR、20.30±2.84 ms/RR、8.70±2.16 ms/RR(P<0.01)。结论冠心病患者HRT趋于异常。

冠心病并室性早搏患者心率振荡的变化及意义

目的探讨冠心病并室性早搏患者心率振荡(HRT)的变化及意义。方法选择并发室性早搏的冠心病患者30例和无心脏病室性早搏患者各30例,行24 h动态心电图记录,计算其早期振荡(TO)和振荡斜率(TS)。结果冠心病患者TO明显高于对照组(P<0.001),TS明显低于对照组(P<0.01)。患者TO与左室射血分数(LVEF)负相关(r=-0.3473,P>0.05),与冠脉病变支数正相关(r=0.5669,P<0.01);TS与LVEF正相关(r=0.6406,P<0.001),与冠脉病变支数负相关(r=-0.6989,P<0.01)。结论冠心病患者HRT减低,HRT可用于冠心病患者病情程度的判断。

原发性高血压病患者126例脉压与窦性心律振荡的检测分析

目的探讨原发性高血压病患者脉压与窦性心律振荡（HRT）的关系，旨在了解脉压增大时患者自主神经功能受损的情况。方法选择驻马店市第一人民医院心内科126例原发性高血压病患者，分为脉压增大组（≥40mm Hg，1mm Hg=0．133kPa）和脉压正常组（〈40mm Hg），对两组的脉压及HRT情况进行检测分析。结果脉压增大组和正常组的HRT情况：振荡初始（TO）〈0及振荡斜率〉2．5ms／RR分别为33例、6例，TO≥0及TS≤2．5ms／RR的35例、52例。两组的HRT情况比较差异有统计学意义（χ^2=21．36，P〈0．01）。结论原发性高血压病患者脉压增大的情况下HRT存在异常，从而表明脉压增大患者存在明显的自主神经功能受损情况。

A Four-Element Sensor Array Consisting of Asymmetric Distributed-Feedback Fiber Lasers

A sensor array system formed by arranging four asymmetric distributed-feedback fiber lasers （DFB-FL） in ascending order according to their slope efficiencies was proposed. The output flatness could be effectively improved with the application of asymmetric DFB-FLs. The last element had almost the same output with the others although it obtained the smallest pump power. The relative intensity noise （RIN） and relaxation oscillation frequency of the sensor array were also analyzed. It is found that the relaxation oscillation frequency of a certain DFB-FL was relevant to its relative position in the array. And the RIN of a certain DFB-FL was always affected by the other elements in the array, which was not dependent on the order of their arrangement.