主动脉的

Results According to the experience, the enhancement threshold of aorta, portal vein and hepar were set at 70 HU. The onset and ending time of enhancement threshold were found.

结果根据经验确定主动脉、门静脉及肝实质的增强阈值为70HU，并找到增强阈值达到和结束的时间。

AIM: To observe the post-implantation morphological chan ges in valved aortic homograft conduit of neonate rabbit.

目的：观察新生动物的同种主动脉带瓣管道移植后的形态学变化。

Among them,the hypoplasia of left and/or right pulmonary arteries was found.

右心室和主动脉造影结合必要的选择性侧支血管造影仍是显示体肺侧支供血和肺动脉发育的重要方法。

Objective To explore the modified pulmonary to aortic flow time interval ratios in quantitative estimation of pulmonary arterial pressures.

目的 探讨改良的肺动脉/主动脉血流时间间期比定量估测肺动脉压的新方法。

METHODS: The models of abdominal aorta transplantation were made with micro-surgery in rats. The recipients were divided into three groups: allograft control group, atorvastatin-treated group and isograft control group. Vascular intimal thickness in all of the groups was observed by histological examination. The expression of proliferation cell nuclear antigenl and α-smooth muscle actin were determined by immunohistochemistry. The content of nitric oxide was measured by nitrate reductase chromatometry.

建立大鼠腹主动脉移植慢性排斥反应模型，分为3组：异系移植对照组、异系移植治疗组和同系移植组，60d后对移植动脉行病理组织学检测，观察移植动脉内膜增生程度；并行免疫组织化学染色，检测移植动脉增殖细胞核抗原和平滑肌肌动蛋白的表达情况，行硝酸还原酶比色法测定移植动脉组织NO的含量。

But in February of 1988, tests showed a leaking artery at the base of his brain.

但是在1988年的2月份，检查报告显示他大脑的一条主动脉在渗漏。

This paper included: the pathogenesis and resuscitation of commotio eordis ; traumatic pericardial rupture associated with heart luxation and/or diaphragmatocele in pericardial cavity; indication selection of emergency room thoracotomy for severe heart injury and traumatic aortic disruption treated with endovascular stent graft.

本文概括了心脏震荡伤发病机制与急救，钝性心包破裂合并心脏疝和／或心包内隔疝的诊断和治疗，严重心脏伤急诊室开胸术适应证的选择和外伤性胸主动脉破裂等介入性腔内支架血管植入术等内容。

Methods: The nursing method was analyzed retrospectively in the diagnosis of 108 suspected cases with acute thoracic aortic dissection by multiplane transesophageal echocardiography.

对108例临床拟诊急性胸主动脉夹层的患者行多平面经食道超声心动图检查的护理方法进行回顾性分析。

Methods:43 patients including 10 with mitral stenosis associated aortic regurgitation, 12 with mixed mitral valve lesions and 21 with mixed mitral valve lesions and combined with aortic regurgitation were studied.MVA determinded by (1) two -dimensional echocardiography with a cross-sectional area in the short-axis view (2DE),(2) pressure half-time using formula of 220/PHT,(3) color Doppler flow imaging with a jet cross-sectional area in the short-axis view with planimetry,(4) CDFI with a color jet width at the mitral valve orifice in the apical four-chamber view and long-axis view, assuming an elliptic mitral orifice, compared with the orifice area of excised mitral valve during mitral valve replacement.

材料与方法∶分别用二维超声(2DE)、压差减半时间、彩色多普勒二尖瓣口血流截面积和椭圆形面积法测定43例风湿性心脏病二尖瓣狭窄拟行人工瓣置换术患者的MVA，其中合并主动脉瓣反流 10例，合并二尖瓣反流 12例， 21例，并与手术标本的实测面积相比较。

Its predictive power in patients undergoing emergency surgery for acute type A aortic dissection is yet unknown.

它在急性A型主动脉夹层的急诊手术中的预测能力尚不清楚。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。