期前收缩

Methods The resistive index in fifty-three cases of hydronephrotic kidney were observed and compared before and after operation (3 months and 6 months). All patients were examined for intravenous urography and nephrogram.

采用多普勒超声检测53例梗阻性肾积水患者的动脉血流参数［收缩期最大峰值流速、舒张期最低流速、阻力指数］，并进行术前、术后3、6个月的随访观察，同时与静脉尿路造影和肾图对比。

Methods: The motion of parasternal papillary muscle anterior wall, inferior wall, posterior wall, and lateral wall were detected by 2DE at short axis view of left ventricle before PTCA, 3 d and 1-3 months after PTCA in 33 cases of patients with coronary heart disease, who received PTCA+stent at selected time. Peak systolic velocity of subendocardial, subepicardial and middle layer myocardium, transmural velocity difference of the same segments and Outer lateral mitral valve annulus were also detected at apical 4 chamber view by pulsed wave tissue Doppler imaging.

对33例择期行PTCA+支架术的冠心病患者用HP5500型超声诊断仪，于PTCA术前及术后3d、1-3个月对胸骨旁左心室乳头肌短轴切面的前间壁、下壁、后壁、侧壁行二维超声心动图(2DE)检测各节段的室壁运动情况，用脉冲组织多普勒成像检测上述各节段的内、外膜下及中层心肌的收缩期峰值速度，内外膜下心肌的收缩速度差及心尖四腔观二尖瓣外侧环的收缩期峰值速度。

Results Compared with normal myocardium, the peaks of strain and strain rate curve of ischemic myocardium in systole and EF reduced. The postsystolic shortening wave appeared before operation.

结果 术前缺血节段心肌应变和应变率曲线中应变值和收缩期峰应变率值均小于健康人相应心肌节段并可出现收缩后收缩波；术后经治疗的缺血心肌各指标较术前明显增加，PSS波消失，术后左室射血分数有增加。

Results: In non-LAD segments: there were no change of postsystolic strain E(subscript ps during ischemia and infarction compared with baseline, nor after adenosine is administered.

结果：非LAD节段：于缺血及梗死状态下收缩期后收缩的应变E(下标 ps较基础状态差异无显著性意义，应用腺苷后较用药前差异无显著性意义。

Results Compared with normal myocardium, the peaks of strain rate curve at systole, early diastole and late diastole of ischemic myocardium all reduced, the postsystolic shortening wave appeared before operation.

结果术前缺血心肌应变率曲线中收缩期、舒张早期和舒张晚期SR峰值均小于正常节段并可出现收缩后收缩波。

Results Compared with normal myocardium, the peaks of strain and strain rate curve of ischemic myocardium in systole and EF reduced. The postsystolic shortening wave appeared before operation. Each index increased and PSS wave disappeared after operation.

结果 术前缺血节段心肌应变和应变率曲线中应变值和收缩期峰应变率值均小于健康人相应心肌节段并可出现收缩后收缩波；术后经治疗的缺血心肌各指标较术前明显增加，PSS波消失，术后左室射血分数有增加。

Lactated Ringer's or 7.5% NaCl+6% dextran 70 was given for resuscitation 6h postburn.The volumes and rates of fluid infusion were controlled basically on the urinary output of 1.0ml*kg-1*h-1 and cardiac output of 70%～80% of preburn values.The volume load,+dp/dtmax,-dp/dtmax,CI,DO2 and VO2 were obtained to evaluate the effect of HSD resuscitation. Results The resuscitated volume of HSD was 30.56% less during first 24h postburn and 59.50% less at 4h after resuscitation than LR's.

采用犬35%TBSA Ⅲ度烧伤模型，伤后6 h分别用乳酸林格液及HSD进行复苏，并以每h尿量为1.0ml/kg及心输出量为伤前值的70%～80%来调整输液速度及输液量，观察HSD在复苏中容量负荷、左心室等容收缩期最大压力变化速率及左心室舒张期压力下降最大变化速率、心脏指数、氧供给(DO2)及氧消耗(VO2)等的变化。

The volumes and rates of fluid infusion were controlled basically on the urinary output of 1.0ml*kg-1*h-1 and cardiac output of 70%～80% of preburn values.The volume load,+dp/dtmax,-dp/dtmax,CI,DO2 and VO2 were obtained to evaluate the effect of HSD resuscitation. Results The resuscitated volume of HSD was 30.56% less during first 24h postburn and 59.50% less at 4h after resuscitation than LR's.

采用犬35%TBSA Ⅲ度烧伤模型，伤后6 h分别用乳酸林格液及HSD进行复苏，并以每h尿量为1.0ml/kg及心输出量为伤前值的70%～80%来调整输液速度及输液量，观察HSD在复苏中容量负荷、左心室等容收缩期最大压力变化速率及左心室舒张期压力下降最大变化速率、心脏指数、氧供给(DO2)及氧消耗(VO2)等的变化。

Reduce presystolic and systolic mitral and tricuspid regurgitation resulting to increase time available for forward flow.

2在收缩期及收缩期前减少二尖瓣返流，增加心室前向排血量。

Results The characters of ECG in PPB were: heart rate increased with the excessive pressure level; cardiac arrthymias, such as premature beat and conduction system block , occurred occasionally （totally 7.4%）.

结果加压呼吸训练中心电图变化特征为：心率随加压值的增高而增加，期前收缩、传导阻滞等心律失常偶有发生（共计7.4％）。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐