Loukas Marios, Wartmann Christopher T, Tubbs R Shane, Apaydin Nihal, Louis Robert G, Black Brandie, Jordan Robert
Department of Anatomical Sciences, School of Medicine, St George's University, Grenada, West Indies.
Surg Radiol Anat. 2008 Jun;30(4):317-22. doi: 10.1007/s00276-008-0326-5. Epub 2008 Feb 19.
Left ventricular false tendons (LFTs) have been extensively described and recognized by gross anatomic studies. However, there is very little information available regarding right ventricular false tendons (RFTs). The aim of our study, therefore, was to explore and delineate the morphology, topography and morphometry of the RFTs, and provide a comprehensive picture of their anatomy across a broad range of specimens. We identified 35/100 heart specimens containing right ventricular RFTs and classified them into five types. In Type I (21, 47.7%) the RFTs, was located between the ventricular septum and the anterior papillary muscle; in Type II (11, 22.9%) between ventricular septum and the posterior papillary muscle; in Type III (7, 14.5%) between the anterior leaflet of the tricuspid valve and the right ventricular free wall; in Type IV (5, 10.4%) between the posterior papillary muscle and the ventricular free wall; and lastly, in Type V (4, 8.3%) between the anterior papillary muscle and ventricular free wall. The mean length of the RFTs was 18 +/- 7 mm with a mean diameter of 1.4 +/- 05 mm. Histologic examination with Masson trichrome and PAS revealed that 20 (41.6%) of the 48 RFTs carried conduction tissue fibers. The presence of conduction tissue fibers within the RFTs was limited to Types I, III, and IV. In Types II and V the RFTs resembled fibrous structures in contrast with Type I, II and IV, which were composed more of muscular fibers, including conduction tissue fibers. RFTs containing conduction tissue fibers were identified, which may implicate them in the appearance of arrhythmias.
左心室假腱索（LFTs）已被大体解剖学研究广泛描述和认识。然而，关于右心室假腱索（RFTs）的信息却非常少。因此，我们研究的目的是探索并描绘RFTs的形态、位置和形态测量，并在广泛的标本范围内提供其解剖结构的全貌。我们在100个心脏标本中识别出35个含有右心室RFTs，并将它们分为五种类型。在I型（21个，47.7%）中，RFTs位于室间隔和前乳头肌之间；在II型（11个，22.9%）中位于室间隔和后乳头肌之间；在III型（7个，14.5%）中位于三尖瓣前叶和右心室游离壁之间；在IV型（5个，10.4%）中位于后乳头肌和心室游离壁之间；最后，在V型（4个，8.3%）中位于前乳头肌和心室游离壁之间。RFTs的平均长度为18±7mm，平均直径为1.4±0.5mm。用Masson三色染色法和PAS进行组织学检查发现，48个RFTs中有20个（41.6%）含有传导组织纤维。RFTs中传导组织纤维的存在仅限于I型、III型和IV型。与I型、II型和IV型相比，II型和V型中的RFTs类似纤维结构，I型、II型和IV型更多地由肌纤维组成，包括传导组织纤维。已识别出含有传导组织纤维的RFTs，这可能表明它们与心律失常的出现有关。
