心肌带空间走行的研究

An study on spatial orienfation of ventricular myocardial band

目的解剖并还原煮熟的兔心,研究心肌带结构的空间走行情况。方法正中开胸法制取10个兔心,煮熟后按心肌带标准方法解剖,在心肌带各段中由起点向终点放入标记(直径0·1mm的铜丝),之后按解剖时的逆顺序将心肌带还原为未解剖前状态,将已标记的还原心肌带固定于立方形塑料盒中,从3个方向X线照像。结果心肌带整体螺旋、缠绕为两个环,即基底环和尖端环:尖端环的两个段(降段和升段)在室间隔位置处反方向相交,其夹角约为90°;室间隔部位包括3层,即基底环的右室段、尖端环的降段和升段。结论正常心脏中心肌带降段和升段的夹角约为90°,室间隔部分由3层心肌构成。

Objective By dissected and decomposed the boiled rabbits＇ hearts to study the space courser of ventricular myocardial band of the normal heart architecture. Methods 10 rabbit hearts were boiled and dissected as described by Torrent-Guasp. All myocardial bands were decomposed and tagged, then recovered to the state when they hadn＇t been dissected, and then X-ray photos were taken. Results The myocardial band twists on itself extends from the origin of the pulmonary artery to the root of the aorta. This defines two turns in a helical fashion and delimitates two cavities, the fight and left re, articles. The reciprocal fiber angle within descending and ascending segments of the apical loop was about 90°. The interventricular septum is formed by three muscular strata： right segment, descending segment and ascending segment. Conclusion Our study shows that the reciprocal fiber angle within descending and ascending segments of the apical loop is about 90° and the interventricular septum is formed by three muscular strata.