Joel A, Eifrig T
Gegenbaurs Morphol Jahrb. 1983;129(4):419-24.
The maximal dipole moment of the heart of various species shows a proportionality to the heart weight. The present study investigates whether this relation is also valid for the postnatal period. The Nelson-lead-system separates the influence of the heart growth from that of the body growth. It allows to calculate the resultant dipole moment of the heart. Our experiments were applied to guinea pigs. The postnatal increase of the body weight and heart weight and the development of the dipole moment were obtained for the first 25 d of life. The results show a linear increase of the body weight with age. In contrast, the resultant dipole moment of the heart is almost constant during the first 14 d of life. Only after the 2nd week of life, the maximal dipole moment increases with further age. Evidently, during the first 14 d of the postnatal development other important factors than the growing heart mass influence the magnitude of the dipole moment.
不同物种心脏的最大偶极矩与心脏重量成正比。本研究调查这种关系在出生后阶段是否也成立。尼尔森导联系统将心脏生长的影响与身体生长的影响区分开来。它可以计算心脏的合成偶极矩。我们的实验应用于豚鼠。在出生后的前25天，获得了体重、心脏重量的增加以及偶极矩的发展情况。结果表明体重随年龄呈线性增加。相比之下，心脏的合成偶极矩在出生后的前14天几乎保持不变。仅在出生后第二周之后，最大偶极矩才随着年龄的增长而增加。显然，在出生后发育的前14天，除了不断增长的心脏质量外，其他重要因素也会影响偶极矩的大小。
