Gulyaeva A S, Roshchevskaya I M
Laboratory of Comparative Cardiology, Komi Science Center of the Russian Academy of Sciences, Kommunisticheskaya, 24, 167982, Syktyvkar, Komi Republic, Russia.
Anat Histol Embryol. 2012 Oct;41(5):326-32. doi: 10.1111/j.1439-0264.2012.01139.x. Epub 2012 Feb 20.
The morphology of moderator bands in both heart ventricular cavities was examined on macro- and microscopic levels in 14 six-month-old Landrace pigs. One transverse moderator band, measuring 2.9 ± 0.6 mm in diameter, was located between the septum and the free wall of the right ventricular cavity. On cross-section, clumps of conductive cells were found at the periphery of the moderator band and in its central part around the blood vessels. Large amounts of muscle fibres were identified. The left ventricular cavity contained moderator bands in the form of thin cords, measuring 1.05 ± 0.09 mm in diameter and located mostly between the interventricular septum and the papillary muscles. Conductive tissue was represented by clumps of Purkinje cells, surrounded by myocardial fibres. The proportion of conductive cells and muscle fibres in the moderator bands was approximately the same. Owing to different amounts of conductive cells and muscle fibres in the bands, we assume that moderator bands in the right and left ventricles play different primary functional roles. Our results were compared with previous data on pigs and other ungulate animal species.
在14头6月龄长白猪身上，从宏观和微观层面检查了两个心室腔中节制索的形态。一条横向节制索位于右心室腔的室间隔和游离壁之间，直径为2.9±0.6毫米。在横切面上，在节制索的周边及其围绕血管的中央部分发现了成簇的传导细胞。还识别出大量肌纤维。左心室腔中有细索状的节制索，直径为1.05±0.09毫米，主要位于室间隔和乳头肌之间。传导组织由成簇的浦肯野细胞组成，周围是心肌纤维。节制索中传导细胞和肌纤维的比例大致相同。由于节制索中传导细胞和肌纤维的数量不同，我们推测左右心室中的节制索发挥着不同的主要功能作用。我们的结果与之前关于猪和其他有蹄类动物物种的数据进行了比较。
