窦房的

The basal pacemaking activity of SAN cells was highly dependent on the calcium influx. Elevation of 〓 concentration (4mmol/L) in the perfusate partially antagonized the inhibitory effects of Dip on APA,〓, VDD and RPF.

窦房结细胞的起搏活动在很大程度上依赖于〓内流，提高灌流液中〓浓度（4mmol／L）可部分拮抗Dip对APA、〓、VDD和RPF的抑制作用，使其降低这些参数的作用减弱。

By superfusion of ET-1,the hypoxia-induced decrease in RPF was remarkably potentiated and the occurrence of pacemaker arrest was shifted to an earlier time. The h3,poxia-induced effects could be effectively attenuated after pretreatment with BQ-123,implying the role of endogenous ET-1 release in hypoxia-induced effects.

ET-1可显著加重缺氧所致的RPF降低，使起搏细胞停跳时间前移；而以ET*受体阻断剂BQ-123预处理窦房结标本后，则能有效地缓解缺氧对起搏细胞的效应，提示内源性ET-1的释放在缺氧效应中的作用。

Skull radiographs may show the typical "tram track" calcifications in apposing gyri.

颅骨平片可以显示典型的轨道样钙化，CT可以显示邻近的板障增厚，同侧的副鼻窦及乳突窦房过度气化

The Second Affiliated Hospital, Medical School of Xian Jiaotong University, Xian 710004, ChinaABSTRACT: Objective To observe the acute homodynamic changes of biventricular pacing in patients with sick sinus syndrome and investigate the Ca2+ changes during absolute refractory period electrical stimulation by applying computer simulation.

目的 观察双心室起搏对病态窦房结综合征(sick sinus syndrome， SSS)患者的急性血液动力学变化及心脏绝对不应期电刺激对心功能的影响，通过计算机仿真研究，探讨绝对不应期电刺激的离子流作用机制。

The control of the heartbeat starts with a small clump of muscle cells in the upper right chamber, called the sinoatrial node.

控制心跳开始与一小丛的肌肉细胞在右上角的会议厅内，所谓的窦房结。

A part of the body, such as the mass of muscle fibers of the sinoatrial node, that sets the pace or rhythm of physiological activity.

起搏点身体的一部分，如窦房结的肌肉组织纤维团，用来确定生理活动的速度或节奏

But the signal transduction of IP is very complicated and redundant, only a little has been known about its protective mechanism and the study of effect of IP on the sinoatrial node is rarely seen.

但IP 的信号转导途径非常复杂，IP 的保护机制至今尚未阐明，有关IP 对窦房结的影响研究也十分有限。

In the previous study, we have found that ischemia/reperfusion could cause structural and functional damages to sinoatrial node cells in vivoand in vitro, leading to electrophysiological disturbance by affecting the regular rhythm and frequency.

本实验室在前期的研究中发现，缺血/再灌注可引起在体及离体窦房结细胞结构和功能的改变，影响其电信号发放的节律和频率，导致电生理活动的紊乱。

Though both dog and sheep were the suitable animal models of RV, IVS and SAN for human, neither dog nor sheep were suitable to animal models of LV, AVN and PHD for human.

狗、羊适合作为人右心室、室间隔与窦房结研究的制模动物，不适合作为人左心室、房室结及心脏后壁优势分布研究的制模动物。

30 Dogs and 180 rats were divided into 6 groups randomly and respectively,then irradiated by pulse microwave with 5 different power densities ranged from 1.004 mW/cm~2 to 0.974 kW/cm~2 in different group.12 months after irradiation,animal temperature,heart rate,electrocardiogram and serum myocardial enzyme spectrum were tested to study the changes of heart function,and the pathologic histological changes of myocardium were observed with paraffin slice dyed by HE,Pollak and PTAH respectively,and ultrastructu...

30只犬，180只大鼠，各随机分为6组，分别以5个功率密度(从1.004 mW/cm2至0.974 kW/cm2)脉冲微波辐照，在辐照后即刻(0 h)至12个月的不同时相点，分别检测其体温、心率、心电图、心肌酶谱等指标，以研究心脏功能的变化；分别取左右房室肌、窦房结、血管等作石蜡切片，并HE、Pollak、PTAH染色，以研究其病理组织学变化；取大鼠心室肌作超薄切片，电镜观测其超微结构的改变。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。