Comparative analysis of aortic impedance and wave reflection in ferrets and dogs.
Comparative analysis of aortic impedance and wave reflection in ferrets and dogs.
复制标题
雪貂和狗主动脉阻抗和波反射的比较分析。
DOI：
10.1152/ajpheart.2002.282.1.h244
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Campbell
中科院分区：
文献类型：
--
作者：
R. Burattini;K. Campbell
我们的 T 管动脉模型的修改版本（由两条并行的、无损传输路径组成，终止于复杂且频率相关性质的集总负载）被应用于从狗和雪貂身上采集的升主动脉压以及升主动脉和降主动脉流量的实验测量。我们的目的是对主动脉压力和血流脉搏波成分进行定量评估，因为它们与动脉特性的分布有关，并且与大小和形状始终不同的哺乳动物中的波传播和反射有关。狗的头端 (d(h)) 和体端 (d(b)) 传输路径的估计有效长度（到有效反射点的距离）分别约为 12 和 30 厘米，雪貂分别为 6.5 和 13 厘米。这些估计动脉特性的长度和分布与身体大小的差异以及雪貂体内的心脏位置比狗体内的心脏位置更一致是一致的。在这两种动物中，升主动脉压力和血流波可以用来自两个不同有效反射位点的前向和反射分量来解释，尽管雪貂中较高的 d(h)/d(b) 比率决定了在 0 至 10 Hz 频率范围内升主动脉阻抗模量存在一个宽泛的、模糊的最小值，而不是像在狗中观察到的两个不同的最小值。
Our modified version of the T-tube arterial model (consisting of two parallel, loss-free transmission paths terminating in lumped loads of complex and frequency-dependent nature) was applied to experimental measurements of ascending aortic pressure and of ascending and descending aortic flows taken from dogs and ferrets. Our aim was to provide quantitative evaluation of the aortic pressure and flow pulse wave components as they relate to the distribution of arterial properties and relate to wave travel and reflection in mammalians of consistently different size and shape. Estimated effective lengths (distances to effective reflection sites) of the head-end (d(h)) and body-end (d(b)) transmission paths were approximately 12 and 30 cm, respectively, in the dog and 6.5 and 13 cm, respectively, in the ferret. These lengths and distributions of estimated arterial properties were consistent with the difference in the body size and with the more central location of the heart in the ferret's body than it is in the dog's body. In both animal species the ascending aortic pressure and flow waves could be interpreted in terms of forward and reflected components arising from the two distinct effective reflection sites, although the higher d(h)/d(b) ratio in the ferret determined the presence of one broad, indistinct minimum in the modulus of ascending aortic impedance in the frequency range from 0 to 10 Hz, rather than two distinct minima as observed in the dog.
通过终止于风桶的粘弹性 T 管模拟动脉系统的阻抗。
DOI：
10.1152/ajpheart.1989.256.4.h1087
发表时间：
1989
期刊：
The American journal of physiology
影响因子：
--
作者：
Liu,ZR;Shen,F;Yin,FC
通讯作者：
Yin,FC
动脉系统的脉搏反射部位和有效长度。
DOI：
10.1152/ajpheart.1989.256.6.h1684
发表时间：
1989
期刊：
The American journal of physiology
影响因子：
--
作者：
Campbell,KB;Lee,LC;Frasch,HF;Noordergraaf,A
通讯作者：
Noordergraaf,A
T 管模型参数的生理相关性，重点是动脉顺应性。
DOI：
10.1152/ajpheart.1995.269.1.h365
发表时间：
1995
期刊：
The American journal of physiology.
影响因子：
--
作者：
Shroff,SG;Berger,DS;Korcarz,C;Lang,RM;Marcus,RH;Miller,DE
通讯作者：
Miller,DE